This study analyzed the function of different glutathione S-transferase(GST)isoforms and detoxification metabolism responses in Manila clam,Ruditapes philippinarum,exposed to 4 kinds of polycyclic aromatic hydrocarbon...This study analyzed the function of different glutathione S-transferase(GST)isoforms and detoxification metabolism responses in Manila clam,Ruditapes philippinarum,exposed to 4 kinds of polycyclic aromatic hydrocarbons(PAHs)single,and their mixtures for 15 days under laboratory conditions.13 kinds of GSTs in R.philippinarum were classified,and the results of tissue distribution indicated that 12 kinds of GSTs(except GST sigma 3)expressed most in digestive glands.We detected the m RNA expression levels of aryl hydrocarbon receptor signaling pathway,and detoxification system in digestive glands of clams exposed to benzo[a]pyrene(Ba P),chrysene(CHR),benzo[a]anthracene(Ba A),benzo[b]fluoranthene(Bb F),and Ba P+CHR+Ba A+Bb F,respectively.Among these genes,we selected GST-sigma,GST-omega and GST-pi as potential indicators to Ba P;GST-sigma,GST-A and GST-rho to CHR;GST-pi,GST-sigma,GST-A,GST-rho and GST-microsomal to Ba A;GST-theta and GST-mu to Bb F;while GST-pi and GST-mu to the mixture of Ba P,CHR,Ba A and Bb F.Additionally,the bioaccumulation of PAHs in tissues increased remarkably over time,and showed an obvious doseeffect.Under the same concentration,the bioaccumulation in single exposure group was higher than that in mixture group,and the bioaccumulation of PAHs in tissues with different concentrations of stress was irregular.The results revealed the metabolic differences and bioaccumulation rules in clams exposed to four kinds of PAHs,and provided more valuable information for the PAHs risk assessment.展开更多
In order to make rail transit smart stations serve passengers better,the potential of smart stations should be optimized to reduce time cost,and relieve traffic congestion.In this paper,the construction of smart stati...In order to make rail transit smart stations serve passengers better,the potential of smart stations should be optimized to reduce time cost,and relieve traffic congestion.In this paper,the construction of smart stations based on the management experience of a subway station and the benefits of smart stations were analyzed and discussed.The construction of smart stations,as well as the key technologies for the construction of smart stations,will aid in the automation and intelligent management of subway stations.展开更多
Objective To investigate the clinical characteristics of 2 cases with adult-onset leukoencephalopathy with axonal spheroids and pigmented glia(ALSP),analyze the genetic features of colony-stimulating factor 1 receptor...Objective To investigate the clinical characteristics of 2 cases with adult-onset leukoencephalopathy with axonal spheroids and pigmented glia(ALSP),analyze the genetic features of colony-stimulating factor 1 receptor(CSFlR)gene mutations in patients,and to perform functional validation.Methods Clinical and imaging data from 2 ALSPpatients diagnosed at the Second Affiliated Hospital of Fujian Medical University between 2020 and 2021 were collected.Whole-exome sequencing was used to identify potential pathogenic mutations.The function of mutated genes was validated through protein function prediction software and in vitro assays.展开更多
Functional canonical correlation analysis is a key method in multivariate statistics for identifying optimal linear correlations between two functional datasets.However,some functions within these datasets may exhibit...Functional canonical correlation analysis is a key method in multivariate statistics for identifying optimal linear correlations between two functional datasets.However,some functions within these datasets may exhibit anomalies such as sudden changes or fluctuations that deviate from the overall trend,resulting to inaccurate results.To address this,we propose an improved method:Sparse functional canonical correlation analysis based on the L2,1-norm.This approach reduces outliers by optimizing the selection of orthogonal basis functions,thereby enhancing the accuracy and reliability of the analysis.Numerical experiments show that the L2,1-norm-based method significantly outperforms traditional methods.展开更多
Background:Sex determination is a fundamental aspect of forensic anthropology.Anthropometric analyses,particularly of the lower limb,have emerged as valuable tools,offering insights into population-specific for sex cl...Background:Sex determination is a fundamental aspect of forensic anthropology.Anthropometric analyses,particularly of the lower limb,have emerged as valuable tools,offering insights into population-specific for sex classification.While numerous studies have investigated sex dimorphism utilizing various morphometric parameters,limited attention has been directed toward lower limb anthropometry in Nigerian populations.Objective:The objective is to investigate the lower limb anthropometric variables for sex determination among young adults in the Nigerian population.Methodology:A cross-sectional study was conducted with a total of 360 young adults(180 males and 180 females)aged 17-34 years old by random sampling.The anthropometric variables such as femur length,tibia length,foot length,foot width,and foot index were measured.Correlation and discriminant function analysis were performed to ascertain the most discriminative variables for sex classification.Results:The femoral height,knee height,foot length,and foot width among males scored higher mean values than females.Strong positive correlation is seen between femoral height and knee height in males(r=0.851,P<0.05)and females(r=0.781,P<0.05).Foot length shows the highest potential in discriminating sex with percentage accuracy of 72.8%after cross-validation in univariate analysis.However,following multivariate discriminant function analysis,age,knee height,foot length,and foot width were chosen as the significant variables and increased percentage accuracy to 78%after cross-validation.Conclusion:Femoral height,knee height,foot length,and foot width are anthropometric parameters suitable for assessing sexual dimorphism among young adults in the Nigerian population.展开更多
The biosynthesis of anthocyanin in plants is regulated by temperature,light,jasmonic acid(JA),among others.JASMONATE ZIM-DOMAIN(JAZ)proteins are critical repressors of the jasmonic acid(JA)pathway,the role of JAZ prot...The biosynthesis of anthocyanin in plants is regulated by temperature,light,jasmonic acid(JA),among others.JASMONATE ZIM-DOMAIN(JAZ)proteins are critical repressors of the jasmonic acid(JA)pathway,the role of JAZ proteins on anthocyanin biosynthesis under high-temperature or dark conditions remains unexplored.Here,we identified 16 SmJAZ genes in eggplant and characterized their evolutionary relationships,gene structures,and hightemperature(HT)and darkness stress-responsive expression patterns.Both the HT and darkness treatments significantly inhibit anthocyanin biosynthesis in eggplant peel.Correlation analysis revealed that the SmJAZ9 expression strongly correlated with anthocyanin biosynthesis-related genes under HT and darkness conditions.Transient expression assay in eggplant peels demonstrated that nuclear-localized SmJAZ9 is a positive regulator,enhancing anthocyanin biosynthesis via interaction with the transcription factor SmMYB113,thereby promoting SmCHS and SmDFR transcription.Additionally,SmJAZ9 interacted with SmMYC2 but not SmCOI1,suggesting a JA signaling-independent regulatory mechanism under HT and darkness conditions.This study revealed a novel JAZ-mediated regulatory module integrating JA signaling,environmental stress responses,and anthocyanin biosynthesis,providing potential targets for improving eggplant fruit quality.展开更多
The width of rice leaves determines the size of the photosynthetic area.Optimizing rice leaf width can improve the photosynthetic rate,thereby increasing rice yield.In this study,a genome-wide association study(GWAS)w...The width of rice leaves determines the size of the photosynthetic area.Optimizing rice leaf width can improve the photosynthetic rate,thereby increasing rice yield.In this study,a genome-wide association study(GWAS)was conducted by 225 rice germplasm resources to explore the genetic basis of rice flag leaf width(FLW).We identified nine QTLs associated with FLW(qFLWs),with phenotypic contribution rates ranging from 3.17%to 14.37%.Near-isogenic lines(NILs)were developed for fine-mapping of qFLW11,and the function of FLW11 was further verified.We narrowed down q FLW11 to an 87-kb interval,which contains five genes.展开更多
Recent industrial activities have increased cadmium(Cd)contamination in soils,negatively affecting crop growth and agricultural development.Chrysanthemum indicum represents a significant wild species within the Chrysa...Recent industrial activities have increased cadmium(Cd)contamination in soils,negatively affecting crop growth and agricultural development.Chrysanthemum indicum represents a significant wild species within the Chrysanthemum genus.Its distinctive resistance and adaptability serve as valuable references for the enhancement of ornamental chrysanthemum breeding programs.However,the role of bZIP family of Cd stress in C.indicum remains unclear.This study conducted a genome-wide identification and expression analysis of bZIP genes in C.indicum,identifying 65 CibZIP genes distributed across nine chromosomes.Phylogenetic analysis grouped them into 12 subgroups,supported by conserved motifs,gene,and protein structure analyses.Tandem and segmental duplications were found to be key drivers of CibZIP gene family expansion,with Ka/Ks analysis indicating purifying selection of duplicated genes.Promoter analysis revealed cis-acting elements involved in plant development and stress response.Transcriptomic data showed that CibZIP genes are highly expressed in different tissues and play significant roles in Cd stress tolerance.RT-qPCR analysis further confirmed that specific CibZIP genes,especially CibZIP29,are upregulated in response to Cd stress.Overexpression of CibZIP29 in transgenic Arabidopsis enhanced Cd tolerance,providing new insights into the molecular mechanisms underlying Cd stress response in C.indicum.These findings contribute to understanding the role of CibZIP genes in Cd tolerance and will support future research on Cd stress mechanisms in Chrysanthemum.展开更多
The MeFER4 gene in cassava(Manihot esculenta Crantz)encodes a ferritin-like protein involved in stress responses,particularly under drought and oxidative stress.This study explores the role of MeFER4 in regulating oxi...The MeFER4 gene in cassava(Manihot esculenta Crantz)encodes a ferritin-like protein involved in stress responses,particularly under drought and oxidative stress.This study explores the role of MeFER4 in regulating oxidative stress in transgenic Arabidopsis.Overexpression of MeFER4 enhanced sensitivity to various stresses,including drought,oxidative,salt,and osmotic stress,with increased levels of reactive oxygen species(ROS)and altered expression of ROSrelated genes in Arabidopsis.Furthermore,interactions between MeFER4 and antioxidant enzymes(APX1 and APX3),suggest its role in managing ROS homeostasis.These findings highlight MeFER4 as a key regulator of oxidative stress responses,offering the potential for improving stress tolerance in crops.展开更多
The Shaanxi-Gansu-Ningxia(SGN)border region,as a typical transitional zone between the East Asian monsoon and the westerlies,features a fragile ecological environment.In this study,the spatiotemporal evolution and mul...The Shaanxi-Gansu-Ningxia(SGN)border region,as a typical transitional zone between the East Asian monsoon and the westerlies,features a fragile ecological environment.In this study,the spatiotemporal evolution and multiscale driving mechanisms of surface winds in this ecologically fragile transition zone were investigated by integrating trend analysis,empirical orthogonal function(EOF)decomposition,and geographic detector method.The results indicated that from 1980 to 2022,the annual mean surface wind speeds in the SGN border region significantly increased,with a linear growth rate of 0.003 m/(s•a).However,the anomaly series revealed a clear interdecadal transition:surface wind speed anomalies were predominantly negative from 1980 to 1999 and shifted to persistently positive and increasing anomalies after 2000.Consistent strengthening was observed in summer,autumn,and winter,with the most pronounced increase occurring in autumn.The spatial distribution generally followed a pattern of higher values in the northwest and lower values in the southeast.Spring presented the strongest surface wind speeds and the most extensive areas with high values.EOF analysis revealed two dominant spatial modes:the first mode(variance contribution>73.40%)reflected regionally consistent changes,and its temporal coefficients increased continuously,corresponding to the overall strengthening trend of surface wind speed;and the second mode exhibited an east‑west dipole oscillation pattern,dominated by interannual fluctuations.The geographic detector results revealed that fractional vegetation cover(FVC),temperature,and topographic elevation were key factors influencing the spatial differentiation of surface wind speeds,with all the factors exhibiting enhanced interactive effects—especially the synergistic effect between vegetation cover and temperature.Background circulation analysis indicated that enhanced westerlies and decreased geopotential height in the mid‑to upper‑troposphere provided favourable dynamic conditions for increased surface wind speeds.This study advances the understanding of surface wind speed changes in climate transition zones,providing a scientific basis for regional wind energy planning,ecological protection,and wind erosion control.展开更多
This study presents an analysis of the spectral characteristics of remote sensing reflectance(Rrs)in northwestern South China Sea based on the in situ optical and water quality data for August 2018.Rrswas initially di...This study presents an analysis of the spectral characteristics of remote sensing reflectance(Rrs)in northwestern South China Sea based on the in situ optical and water quality data for August 2018.Rrswas initially divided into four classes,classes A to D,using the max-classification algorithm,and the spectral properties of whole Rrs were characterized using the empirical orthogonal function(EOF)analysis.Subsequently,the dominant factors in each EOF mode were determined.The results indicated that more than 95%of the variances of Rrs are partly driven by the back-scattering characteristics of the suspended matter.The initial two EOF modes were well correlated with the total suspended matter and back-scattering coefficient.Furthermore,the first EOF modes of the four classes of Rrs(A-D Rrs-EOF1)significantly contributed to the total variances of each Rrs class.In addition,the correlation coefficients between the amplitude factors of class A-D Rrs-EOF1 and the variances of the relevant water quality and optical parameters were better than those of the unclassified ones.The spectral shape of class ARrs-EOF1 was governed by the absorption characteristic of chlorophyll a and colored dissolved organic matter(CDOM).The spectral shape of class B Rrs-EOF1 was governed by the absorption characteristic of CDOM since it exhibited a high correlation with the absorption coefficient of CDOM(ag(λ)),whereas the spectral shape of class C Rrs-EOF1 was governed by the back-scattering characteristics but not affected by the suspended matter.The spectral shape of class D Rrs-EOF1 exhibited a relatively good correlation with all the water quality parameters,which played a significant role in deciding its spectral shape.展开更多
Stable genetic transformation of peach[Prunus persica(L.)Batsch]still faces many technical challenges,and existing transient expression methods are limited by tissue type or developmental stage,making it difficult to ...Stable genetic transformation of peach[Prunus persica(L.)Batsch]still faces many technical challenges,and existing transient expression methods are limited by tissue type or developmental stage,making it difficult to conduct functional analysis of genes regulating shoot growth.To overcome this dilemma,we developed a three-step method for efficient analysis of gene functions during peach seedling growth and development.This method resulted in transformation frequencies ranging from 48 to 87%,depending on the gene.From transformation of germinating seeds to phenotyping of young saplings took just 1.5 months and can be carried out any time of year.To test the applicability of this method,the function of three tree architecture-related genes,namely PpPDS,PpMAX4,and PpWEEP,and two lateral root-related genes,PpIAA14–1 and−2,were confirmed.Since functional redundancy can challenge gene functional analyses,tests were undertaken with the growth-repressor DELLA,which has three homologous genes,PpDGYLA(DG),PpDELLA1(D1),and−2(D2),in peach that are functionally redundant.Silencing using a triple-target vector(TRV2-DG-D1-D2)resulted in transgenic plants taller than those carrying just TRV2-DG or TRV2.Simultaneously silencing the three DELLA genes also attenuated the stature of two dwarf genotypes,‘FHSXT’and‘HSX’,which normally accumulate DELLA proteins.Our study provides a method for the functional analysis of genes in peach and can be used for the study of root,stem,and leaf development.We believe this method can be replicated in other woody plants.展开更多
Production of multiple flowers in inflorescences allows the reproductive phenotypes of individual plants to include systematic among-flower variation,which could be adaptive.Systematic trait variation within infloresc...Production of multiple flowers in inflorescences allows the reproductive phenotypes of individual plants to include systematic among-flower variation,which could be adaptive.Systematic trait variation within inflorescences could arise from resource competition among flowers,or be a developmentally determined feature of flower position,regardless of resource dynamics.The latter,architectural effect typically manifests as continuous floral variation within inflorescences.For architectural effects to be adaptive,floral trait variation among individuals must covary with reproductive performance and be heritable.However,heritability and phenotypic selection on gradients of variation cannot be estimated readily with traditional statistical approaches,instead,we advocate and illustrate the application of two functional data analysis techniques with observations of Delphinium g/aucum(Ranunculaceae).To demonstrate the parameters-as-data approach we quantify heritability of variation in anthesis rate,as represented by the regression coefficient relating daily anthesis rate to inflorescence age.SNP-based estimates detected significant heritability(h2=0.245)for declining anthesis rate within inflorescences.Functional regression was used to assess phenotypic selection on anthesis rate and a floral trait(lower sepal length).The approach used spline curves that characterize within-inflorescence variation as functional predictors of a plant's fruit set.Selection on anthesis rate varied with inflorescence age and the duration of an individual's anthesis period.Lower sepal length experienced positive selection for basa]and distal flowers,but negative selection for central flowers.These results illustrate the utility and power of functional-data analyses for studying architectural effects and specifically demonstrate that these effects are subject to natural selection and hence adaptive.展开更多
Transcription factors with basic helix–loop–helix(bHLH)structures regulate plant growth,epidermal structure development,metabolic processes,and responses to stress extensively.Sea lavender(Limonium bicolor)is a recr...Transcription factors with basic helix–loop–helix(bHLH)structures regulate plant growth,epidermal structure development,metabolic processes,and responses to stress extensively.Sea lavender(Limonium bicolor)is a recretohalophyte with unique salt glands in the epidermis that make it highly resistant to salt stress,contributing to the improvement of saline lands.However,the features of the bHLH transcription factor family in L.bicolor are largely unknown.Here,we systematically analyzed the characteristics,localization,and phylogenetic relationships of 187 identified bHLH family genes throughout the L.bicolor genome,as well as their cis-regulatory promoter elements,expression patterns,and key roles in salt gland development or salt tolerance by genetic analysis.Nine verified L.bicolor bHLH genes are expressed and the encoded proteins function in the nucleus,among which the proteins encoded by Lb2G14060 and Lb1G07934 also localize to salt glands.Analysis of CRISPR-Cas9-generated knockout mutants and overexpression lines indicated that the protein encoded by Lb1G07934 is involved in the formation of salt glands,salt secretion,and salt resistance,indicating that bHLH genes strongly influence epidermal structure development and stress responses.The current study lays the foundation for further investigation of the effects and functional mechanisms of bHLH genes in L.bicolor and paves the way for selecting salt-tolerance genes that will enhance salt resistance in crops and for the improvement of saline soils.展开更多
Crop yield prediction is essential for effective agricultural management.We introduce a methodology for modeling the relationship between environmental parameters and crop yield in longitudinal crop cultivation,exempl...Crop yield prediction is essential for effective agricultural management.We introduce a methodology for modeling the relationship between environmental parameters and crop yield in longitudinal crop cultivation,exemplified by strawberry and tomato production based on year-round cultivation.Employing functional data analysis(FDA),we developed a model to assess the impact of these factors on crop yield,particularly in the face of environmental fluctuation.Specifically,we demonstrated that a varying-coefficient functional regression model(VCFRM)is utilized to analyze time-series data,enabling to visualize seasonal shifts and the dynamic interplay between environmental conditions such as solar radiation and temperature and crop yield.The interpretability of our FDA-based model yields insights for optimizing growth parameters,thereby augmenting resource efficiency and sustainability.Our results demonstrate the feasibility of VCFRM-based yield modeling,offering strategies for stable,efficient crop production,pivotal in addressing the challenges of climate adaptability in plant factory-based horticulture.展开更多
AIM: TO investigate the protein profile of human hepatocarcinoma cell line SMMC-7721, to analyze the specific functions of abundant expressed proteins in the processes of hepatocarcinoma genesis, growth and metastasi...AIM: TO investigate the protein profile of human hepatocarcinoma cell line SMMC-7721, to analyze the specific functions of abundant expressed proteins in the processes of hepatocarcinoma genesis, growth and metastasis, to identify the hepatocarcinoma-specific biomarkers for the early prediction in diagnosis, and to explore the new drug targets for liver cancer therapy. METHODS: Total proteins from human hepatocarcinoma cell line SMMC-7721 were separated by two-dimensional electrophoresis (2DE). The silver-stained gel was analyzed by 2DE software Image Master 2D Elite. Interesting protein spots were identified by peptide mass fingerprinting based on matrix-assisted laser desorption/ ionization time-of-flight mass spectrometry (MALDI-TOF-MS) and database searching. RESULTS: We obtained protein profile of human hepatocarcinoma cell line SMMC-7721. Among the twenty-one successfully identified proteins, mitofilin, endoplasmic reticulum protein ERp29, ubiquinol-cytochrome C reductase complex core protein I, peroxisomal enoyl CoA hydratase, peroxiredoxin-4 and probable 3-oxoacid CoA transferase 1 precursor were the six novel proteins identified in human hepatocarcinoma cells or tissues. Specific functions of the identified heat-shock proteins were analyzed in detail, and the results suggested that these proteins might promote tumorigenesis via inhibiting cell death induced by several cancer-related stresses or via inhibiting apoptosis at multiple points in the apoptotic signal pathway. Other identified chaperones and cancer-related proteins were also analyzed.CONCLUSION: Based on the protein profile of SMMC-7721 cells, functional analysis suggests that the identified chaperones and cancer-related proteins have their own pathways to contribute to the tumorigenesis, tumor growth and metastasis of liver cancer. Furthermore, proteomic analysis is indicated to be feasible in the cancer study.展开更多
Despite controversy regarding the clinical value of semen analysis, male fertility investigation still relies on a standardized analysis of the semen parameters. This is especially true for infertility clinics in both...Despite controversy regarding the clinical value of semen analysis, male fertility investigation still relies on a standardized analysis of the semen parameters. This is especially true for infertility clinics in both developing and developed countries. Other optional tests or sophisticated technologies have not been widely applied. The current review addresses important changes in the analysis of semen as described in the new World Health Organization (WHO) manual for semen analysis. The most important change in the manual is the use of evidence-based publications as references to determine cutoff values for normality. Apart from the above mentioned changes, the initial evaluation and handling methods remain, in most instances, the same as in previous editions. Furthermore, the review evaluates the importance of quality control in andrology with emphasis on the evaluation of sperm morphology. WHO sperm morphology training programmes for Sub-Saharan countries were initiated at Tygerberg Hospital in 1995. The external qualitY control programme has ensured that the majority of participants have maintained their morphological reading skills acquired during initial training. This review reports on current sperm functional tests, such as the induced acrosome reaction, and sperm-zona pellucida binding assays, as well as the impact of sperm quality in terms of DNA integrity, and the relationship of sperm function tests to sperm morphology.展开更多
Ginkgo biloba is known for its abundance of secondary metabolites,such as terpenoids.However,the identification and functional analysis of key genes in the terpenoid biosynthetic pathway are limited.Geranylgeranyl pyr...Ginkgo biloba is known for its abundance of secondary metabolites,such as terpenoids.However,the identification and functional analysis of key genes in the terpenoid biosynthetic pathway are limited.Geranylgeranyl pyrophosphate synthase(GGPPS)is a crucial enzyme involved in the production of terpenoids.In this study,we successfully cloned the GbGGPPS1 gene from G.biloba.The length of GbGGPPS1 was 1,176 bp,encoding 391 amino acids.The GbGGPPS1 protein contains the GGPPS protein domain,including the FARM and SAR motifs.Phylogenetic analysis revealed that GbGGPPS1 is closely related to gymnosperms.Furthermore,the expression of GbGGPPS1 was higher in leaves,stems,and ovules compared to the roots.Additionally,overexpression of GbGGPPS1 in Arabidopsis increased chlorophyll content and accelerated flowering process,indicating its role as a terpenoid synthase gene and plant development.Notably,the expression of GbGGPPS1 can be induced by salt stress,and overexpression of GbGGPPS1 in Arabidopsis exhibited enhanced seed germination under salt treatment.These results indicate that GbGGPPS1 plays an important role in plant growth,development,and salt stress resistance.展开更多
Reliability allocation of computerized numerical controlled(CNC)lathes is very important in industry.Traditional allocation methods only focus on high-failure rate components rather than moderate failure rate componen...Reliability allocation of computerized numerical controlled(CNC)lathes is very important in industry.Traditional allocation methods only focus on high-failure rate components rather than moderate failure rate components,which is not applicable in some conditions.Aiming at solving the problem of CNC lathes reliability allocating,a comprehensive reliability allocation method based on cubic transformed functions of failure modes and effects analysis(FMEA)is presented.Firstly,conventional reliability allocation methods are introduced.Then the limitations of direct combination of comprehensive allocation method with the exponential transformed FMEA method are investigated.Subsequently,a cubic transformed function is established in order to overcome these limitations.Properties of the new transformed functions are discussed by considering the failure severity and the failure occurrence.Designers can choose appropriate transform amplitudes according to their requirements.Finally,a CNC lathe and a spindle system are used as an example to verify the new allocation method.Seven criteria are considered to compare the results of the new method with traditional methods.The allocation results indicate that the new method is more flexible than traditional methods.By employing the new cubic transformed function,the method covers a wider range of problems in CNC reliability allocation without losing the advantages of traditional methods.展开更多
The SKP1 gene is an important component of the SCF(SKP1-Cullin1-F-box)complex and serves as a bridge connecting the F-box and Cullin1genes(F-box-SKP1-Cullin1).The pattern of S-RNase being ubiquitously labelled by the ...The SKP1 gene is an important component of the SCF(SKP1-Cullin1-F-box)complex and serves as a bridge connecting the F-box and Cullin1genes(F-box-SKP1-Cullin1).The pattern of S-RNase being ubiquitously labelled by the SCF complex and degraded by the 26S protease accounts for the bulk of the available self-incompatibility studies.In this study,15 ClSKP1s from the‘Xiangshui'lemon genome and ubiquitome exist in the same SKP1 conserved domain(CD)as SKP1s in other species.The q PCR results showed that SKP1-6 and SKP1-14 have tissue expression patterns specific for expression in pollen.In addition,SKP1-6 and SKP1-14 in the stigma,style and ovary were significantly upregulated after self-pollination compared to those after cross-pollination.A subcellular location showed that SKP1-6 and SKP1-14 were located in the nucleus.In addition,yeast two-hybrid(Y2H)assays,bimolecular fluorescence complementation(BiFC)and luciferase complementation imaging(LCI)assays showed that SKP1-6 interacted with F-box1,F-box33,F-box34,F-box17,F-box19,Cullin1-2 and 26S proteasome subunit 4 homolog A(26S PS4HA).SKP1-14 interacted with F-box17,F-box19,F-box35,Cullin1-2 and 26S PS4HA.The interaction of Cullin1-2 and the F-box with SKP1 as a bridge was verified by a yeast three-hybrid experiment.The ability of S3-RNase to inhibit pollen and pollen tube growth and development was assessed using in vitro pollen co-culture experiments with recombinant S3-RNase proteins.Overall,this study provides important experimental evidence and theoretical basis for understanding the mechanism of self-incompatibility in plants by revealing the key role of the SCF complex in‘Xiangshui'lemon,which is bridged by ClSKP1-6,in self-incompatibility.The results of this study are of great significance for the future indepth exploration of the molecular mechanism of the SCF complex and its wide application in the self-incompatibility of plants.展开更多
基金supported by the Key Technology Research and Development Program of Shandong Province(No.2018GHY115007)。
摘要This study analyzed the function of different glutathione S-transferase(GST)isoforms and detoxification metabolism responses in Manila clam,Ruditapes philippinarum,exposed to 4 kinds of polycyclic aromatic hydrocarbons(PAHs)single,and their mixtures for 15 days under laboratory conditions.13 kinds of GSTs in R.philippinarum were classified,and the results of tissue distribution indicated that 12 kinds of GSTs(except GST sigma 3)expressed most in digestive glands.We detected the m RNA expression levels of aryl hydrocarbon receptor signaling pathway,and detoxification system in digestive glands of clams exposed to benzo[a]pyrene(Ba P),chrysene(CHR),benzo[a]anthracene(Ba A),benzo[b]fluoranthene(Bb F),and Ba P+CHR+Ba A+Bb F,respectively.Among these genes,we selected GST-sigma,GST-omega and GST-pi as potential indicators to Ba P;GST-sigma,GST-A and GST-rho to CHR;GST-pi,GST-sigma,GST-A,GST-rho and GST-microsomal to Ba A;GST-theta and GST-mu to Bb F;while GST-pi and GST-mu to the mixture of Ba P,CHR,Ba A and Bb F.Additionally,the bioaccumulation of PAHs in tissues increased remarkably over time,and showed an obvious doseeffect.Under the same concentration,the bioaccumulation in single exposure group was higher than that in mixture group,and the bioaccumulation of PAHs in tissues with different concentrations of stress was irregular.The results revealed the metabolic differences and bioaccumulation rules in clams exposed to four kinds of PAHs,and provided more valuable information for the PAHs risk assessment.
摘要In order to make rail transit smart stations serve passengers better,the potential of smart stations should be optimized to reduce time cost,and relieve traffic congestion.In this paper,the construction of smart stations based on the management experience of a subway station and the benefits of smart stations were analyzed and discussed.The construction of smart stations,as well as the key technologies for the construction of smart stations,will aid in the automation and intelligent management of subway stations.
摘要Objective To investigate the clinical characteristics of 2 cases with adult-onset leukoencephalopathy with axonal spheroids and pigmented glia(ALSP),analyze the genetic features of colony-stimulating factor 1 receptor(CSFlR)gene mutations in patients,and to perform functional validation.Methods Clinical and imaging data from 2 ALSPpatients diagnosed at the Second Affiliated Hospital of Fujian Medical University between 2020 and 2021 were collected.Whole-exome sequencing was used to identify potential pathogenic mutations.The function of mutated genes was validated through protein function prediction software and in vitro assays.
基金The National Natural Science Foundation of China “Optimization models and algorithms for interpretable learning machines on complex data”(12461058)Xinjiang Key Laboratory of Applied Mathematics (XJDX1401)。
摘要Functional canonical correlation analysis is a key method in multivariate statistics for identifying optimal linear correlations between two functional datasets.However,some functions within these datasets may exhibit anomalies such as sudden changes or fluctuations that deviate from the overall trend,resulting to inaccurate results.To address this,we propose an improved method:Sparse functional canonical correlation analysis based on the L2,1-norm.This approach reduces outliers by optimizing the selection of orthogonal basis functions,thereby enhancing the accuracy and reliability of the analysis.Numerical experiments show that the L2,1-norm-based method significantly outperforms traditional methods.
摘要Background:Sex determination is a fundamental aspect of forensic anthropology.Anthropometric analyses,particularly of the lower limb,have emerged as valuable tools,offering insights into population-specific for sex classification.While numerous studies have investigated sex dimorphism utilizing various morphometric parameters,limited attention has been directed toward lower limb anthropometry in Nigerian populations.Objective:The objective is to investigate the lower limb anthropometric variables for sex determination among young adults in the Nigerian population.Methodology:A cross-sectional study was conducted with a total of 360 young adults(180 males and 180 females)aged 17-34 years old by random sampling.The anthropometric variables such as femur length,tibia length,foot length,foot width,and foot index were measured.Correlation and discriminant function analysis were performed to ascertain the most discriminative variables for sex classification.Results:The femoral height,knee height,foot length,and foot width among males scored higher mean values than females.Strong positive correlation is seen between femoral height and knee height in males(r=0.851,P<0.05)and females(r=0.781,P<0.05).Foot length shows the highest potential in discriminating sex with percentage accuracy of 72.8%after cross-validation in univariate analysis.However,following multivariate discriminant function analysis,age,knee height,foot length,and foot width were chosen as the significant variables and increased percentage accuracy to 78%after cross-validation.Conclusion:Femoral height,knee height,foot length,and foot width are anthropometric parameters suitable for assessing sexual dimorphism among young adults in the Nigerian population.
基金supported by the National Key Research and Development Program(2023YFD2300702)the National Natural Sciences Foundations of China(Grant No.32172556)+3 种基金the Shandong Provincial Key Research and Development Program(2021LZGC018)the Special Fund of Vegetable Industrial Techonolgy System of Shandong Province(SDAIT-05-11)the Tai'an Agricultural Breeding Program(2023NYLZ02)the Grand Science and Technology Special Project of Zhejiang Province(2021C02065).
摘要The biosynthesis of anthocyanin in plants is regulated by temperature,light,jasmonic acid(JA),among others.JASMONATE ZIM-DOMAIN(JAZ)proteins are critical repressors of the jasmonic acid(JA)pathway,the role of JAZ proteins on anthocyanin biosynthesis under high-temperature or dark conditions remains unexplored.Here,we identified 16 SmJAZ genes in eggplant and characterized their evolutionary relationships,gene structures,and hightemperature(HT)and darkness stress-responsive expression patterns.Both the HT and darkness treatments significantly inhibit anthocyanin biosynthesis in eggplant peel.Correlation analysis revealed that the SmJAZ9 expression strongly correlated with anthocyanin biosynthesis-related genes under HT and darkness conditions.Transient expression assay in eggplant peels demonstrated that nuclear-localized SmJAZ9 is a positive regulator,enhancing anthocyanin biosynthesis via interaction with the transcription factor SmMYB113,thereby promoting SmCHS and SmDFR transcription.Additionally,SmJAZ9 interacted with SmMYC2 but not SmCOI1,suggesting a JA signaling-independent regulatory mechanism under HT and darkness conditions.This study revealed a novel JAZ-mediated regulatory module integrating JA signaling,environmental stress responses,and anthocyanin biosynthesis,providing potential targets for improving eggplant fruit quality.
基金supported by the Zhejiang Provincial Natural Science Foundation,China(Grant No.LD24C130001)the National Natural Science Foundation of China(Grant Nos.W2412006 and 32372125)+3 种基金the Hainan Provincial Natural Science Foundation,China(Grant Nos.GHYF2025029 and YBXM2422)the Innovation Platform for Academicians of Hainan Province,China(Grant No.YSPTZX202502)the National Modern Agricultural Industry Technology System Project,China(Grant No.CARS-01-18)the Special Support Program of Chinese Academy of Agricultural Sciences(Grant Nos.NKYCLJ-C-2021-015 and CAAS-ZDRW202401)。
摘要The width of rice leaves determines the size of the photosynthetic area.Optimizing rice leaf width can improve the photosynthetic rate,thereby increasing rice yield.In this study,a genome-wide association study(GWAS)was conducted by 225 rice germplasm resources to explore the genetic basis of rice flag leaf width(FLW).We identified nine QTLs associated with FLW(qFLWs),with phenotypic contribution rates ranging from 3.17%to 14.37%.Near-isogenic lines(NILs)were developed for fine-mapping of qFLW11,and the function of FLW11 was further verified.We narrowed down q FLW11 to an 87-kb interval,which contains five genes.
基金funded by the Science and Technology Development Fund Program of Nanjing Medical University(NMUB20230301).
摘要Recent industrial activities have increased cadmium(Cd)contamination in soils,negatively affecting crop growth and agricultural development.Chrysanthemum indicum represents a significant wild species within the Chrysanthemum genus.Its distinctive resistance and adaptability serve as valuable references for the enhancement of ornamental chrysanthemum breeding programs.However,the role of bZIP family of Cd stress in C.indicum remains unclear.This study conducted a genome-wide identification and expression analysis of bZIP genes in C.indicum,identifying 65 CibZIP genes distributed across nine chromosomes.Phylogenetic analysis grouped them into 12 subgroups,supported by conserved motifs,gene,and protein structure analyses.Tandem and segmental duplications were found to be key drivers of CibZIP gene family expansion,with Ka/Ks analysis indicating purifying selection of duplicated genes.Promoter analysis revealed cis-acting elements involved in plant development and stress response.Transcriptomic data showed that CibZIP genes are highly expressed in different tissues and play significant roles in Cd stress tolerance.RT-qPCR analysis further confirmed that specific CibZIP genes,especially CibZIP29,are upregulated in response to Cd stress.Overexpression of CibZIP29 in transgenic Arabidopsis enhanced Cd tolerance,providing new insights into the molecular mechanisms underlying Cd stress response in C.indicum.These findings contribute to understanding the role of CibZIP genes in Cd tolerance and will support future research on Cd stress mechanisms in Chrysanthemum.
基金supported by the Hainan Provincial Natural Science Foundation of China(324MS122)the National Natural Science Foundation of China(32360458)+1 种基金the startup funds for the Hainan University E-class Talents(XJ2300007513)the China Agriculture Research System(CARS-11-HNCYH),both of which made this research possible.
摘要The MeFER4 gene in cassava(Manihot esculenta Crantz)encodes a ferritin-like protein involved in stress responses,particularly under drought and oxidative stress.This study explores the role of MeFER4 in regulating oxidative stress in transgenic Arabidopsis.Overexpression of MeFER4 enhanced sensitivity to various stresses,including drought,oxidative,salt,and osmotic stress,with increased levels of reactive oxygen species(ROS)and altered expression of ROSrelated genes in Arabidopsis.Furthermore,interactions between MeFER4 and antioxidant enzymes(APX1 and APX3),suggest its role in managing ROS homeostasis.These findings highlight MeFER4 as a key regulator of oxidative stress responses,offering the potential for improving stress tolerance in crops.
基金funded by Key Research and Development Plan of Ningxia Hui Autonomous Region (2023BEG02054)
摘要The Shaanxi-Gansu-Ningxia(SGN)border region,as a typical transitional zone between the East Asian monsoon and the westerlies,features a fragile ecological environment.In this study,the spatiotemporal evolution and multiscale driving mechanisms of surface winds in this ecologically fragile transition zone were investigated by integrating trend analysis,empirical orthogonal function(EOF)decomposition,and geographic detector method.The results indicated that from 1980 to 2022,the annual mean surface wind speeds in the SGN border region significantly increased,with a linear growth rate of 0.003 m/(s•a).However,the anomaly series revealed a clear interdecadal transition:surface wind speed anomalies were predominantly negative from 1980 to 1999 and shifted to persistently positive and increasing anomalies after 2000.Consistent strengthening was observed in summer,autumn,and winter,with the most pronounced increase occurring in autumn.The spatial distribution generally followed a pattern of higher values in the northwest and lower values in the southeast.Spring presented the strongest surface wind speeds and the most extensive areas with high values.EOF analysis revealed two dominant spatial modes:the first mode(variance contribution>73.40%)reflected regionally consistent changes,and its temporal coefficients increased continuously,corresponding to the overall strengthening trend of surface wind speed;and the second mode exhibited an east‑west dipole oscillation pattern,dominated by interannual fluctuations.The geographic detector results revealed that fractional vegetation cover(FVC),temperature,and topographic elevation were key factors influencing the spatial differentiation of surface wind speeds,with all the factors exhibiting enhanced interactive effects—especially the synergistic effect between vegetation cover and temperature.Background circulation analysis indicated that enhanced westerlies and decreased geopotential height in the mid‑to upper‑troposphere provided favourable dynamic conditions for increased surface wind speeds.This study advances the understanding of surface wind speed changes in climate transition zones,providing a scientific basis for regional wind energy planning,ecological protection,and wind erosion control.
基金The Key Projects of the Guangdong Education Department under contract No.2019KZDXM019the Fund of Southern Marine Science and Engineering Guangdong Laboratory(Zhanjiang)under contract No.ZJW-2019-08+2 种基金High-Level Marine Discipline Team Project of Guangdong Ocean University under contract No.002026002009the Guangdong Graduate Academic Forum Project under contract No.230420003the"First Class"discipline construction platform project in 2019 of Guangdong Ocean University under contract No.231419026。
摘要This study presents an analysis of the spectral characteristics of remote sensing reflectance(Rrs)in northwestern South China Sea based on the in situ optical and water quality data for August 2018.Rrswas initially divided into four classes,classes A to D,using the max-classification algorithm,and the spectral properties of whole Rrs were characterized using the empirical orthogonal function(EOF)analysis.Subsequently,the dominant factors in each EOF mode were determined.The results indicated that more than 95%of the variances of Rrs are partly driven by the back-scattering characteristics of the suspended matter.The initial two EOF modes were well correlated with the total suspended matter and back-scattering coefficient.Furthermore,the first EOF modes of the four classes of Rrs(A-D Rrs-EOF1)significantly contributed to the total variances of each Rrs class.In addition,the correlation coefficients between the amplitude factors of class A-D Rrs-EOF1 and the variances of the relevant water quality and optical parameters were better than those of the unclassified ones.The spectral shape of class ARrs-EOF1 was governed by the absorption characteristic of chlorophyll a and colored dissolved organic matter(CDOM).The spectral shape of class B Rrs-EOF1 was governed by the absorption characteristic of CDOM since it exhibited a high correlation with the absorption coefficient of CDOM(ag(λ)),whereas the spectral shape of class C Rrs-EOF1 was governed by the back-scattering characteristics but not affected by the suspended matter.The spectral shape of class D Rrs-EOF1 exhibited a relatively good correlation with all the water quality parameters,which played a significant role in deciding its spectral shape.
基金supported by the Joint Funds of the National Natural Science Foundation of China(U1804114)the National Key Research and Development Program of China(2019YFD1000104)the Mod-ern Agricultural Industry Technology Project of Henan Province(HARS-22-09-G1).
摘要Stable genetic transformation of peach[Prunus persica(L.)Batsch]still faces many technical challenges,and existing transient expression methods are limited by tissue type or developmental stage,making it difficult to conduct functional analysis of genes regulating shoot growth.To overcome this dilemma,we developed a three-step method for efficient analysis of gene functions during peach seedling growth and development.This method resulted in transformation frequencies ranging from 48 to 87%,depending on the gene.From transformation of germinating seeds to phenotyping of young saplings took just 1.5 months and can be carried out any time of year.To test the applicability of this method,the function of three tree architecture-related genes,namely PpPDS,PpMAX4,and PpWEEP,and two lateral root-related genes,PpIAA14–1 and−2,were confirmed.Since functional redundancy can challenge gene functional analyses,tests were undertaken with the growth-repressor DELLA,which has three homologous genes,PpDGYLA(DG),PpDELLA1(D1),and−2(D2),in peach that are functionally redundant.Silencing using a triple-target vector(TRV2-DG-D1-D2)resulted in transgenic plants taller than those carrying just TRV2-DG or TRV2.Simultaneously silencing the three DELLA genes also attenuated the stature of two dwarf genotypes,‘FHSXT’and‘HSX’,which normally accumulate DELLA proteins.Our study provides a method for the functional analysis of genes in peach and can be used for the study of root,stem,and leaf development.We believe this method can be replicated in other woody plants.
基金funded by the Natural Sciences and Engineering Research Council of Canada(RGPIN/107375-2012)a URGC Seed Grant from University of Calgary(LDH).
摘要Production of multiple flowers in inflorescences allows the reproductive phenotypes of individual plants to include systematic among-flower variation,which could be adaptive.Systematic trait variation within inflorescences could arise from resource competition among flowers,or be a developmentally determined feature of flower position,regardless of resource dynamics.The latter,architectural effect typically manifests as continuous floral variation within inflorescences.For architectural effects to be adaptive,floral trait variation among individuals must covary with reproductive performance and be heritable.However,heritability and phenotypic selection on gradients of variation cannot be estimated readily with traditional statistical approaches,instead,we advocate and illustrate the application of two functional data analysis techniques with observations of Delphinium g/aucum(Ranunculaceae).To demonstrate the parameters-as-data approach we quantify heritability of variation in anthesis rate,as represented by the regression coefficient relating daily anthesis rate to inflorescence age.SNP-based estimates detected significant heritability(h2=0.245)for declining anthesis rate within inflorescences.Functional regression was used to assess phenotypic selection on anthesis rate and a floral trait(lower sepal length).The approach used spline curves that characterize within-inflorescence variation as functional predictors of a plant's fruit set.Selection on anthesis rate varied with inflorescence age and the duration of an individual's anthesis period.Lower sepal length experienced positive selection for basa]and distal flowers,but negative selection for central flowers.These results illustrate the utility and power of functional-data analyses for studying architectural effects and specifically demonstrate that these effects are subject to natural selection and hence adaptive.
基金The National Natural Science Research Foundation of China(NSFC,projects 32370304 and 32170301)the MOE Layout Foundation of Humanities and Social Sciences(21YJAZH108)supported this study。
摘要Transcription factors with basic helix–loop–helix(bHLH)structures regulate plant growth,epidermal structure development,metabolic processes,and responses to stress extensively.Sea lavender(Limonium bicolor)is a recretohalophyte with unique salt glands in the epidermis that make it highly resistant to salt stress,contributing to the improvement of saline lands.However,the features of the bHLH transcription factor family in L.bicolor are largely unknown.Here,we systematically analyzed the characteristics,localization,and phylogenetic relationships of 187 identified bHLH family genes throughout the L.bicolor genome,as well as their cis-regulatory promoter elements,expression patterns,and key roles in salt gland development or salt tolerance by genetic analysis.Nine verified L.bicolor bHLH genes are expressed and the encoded proteins function in the nucleus,among which the proteins encoded by Lb2G14060 and Lb1G07934 also localize to salt glands.Analysis of CRISPR-Cas9-generated knockout mutants and overexpression lines indicated that the protein encoded by Lb1G07934 is involved in the formation of salt glands,salt secretion,and salt resistance,indicating that bHLH genes strongly influence epidermal structure development and stress responses.The current study lays the foundation for further investigation of the effects and functional mechanisms of bHLH genes in L.bicolor and paves the way for selecting salt-tolerance genes that will enhance salt resistance in crops and for the improvement of saline soils.
基金supported by PRESTO(grant no.JPMJPR16O6 to H.M.)of the Japan ScienceTechnology Agency and KAKENHI(grant no.19 K11858 to H.M.)of the Japan Society for the Promotion of Science+1 种基金supported by CREST(grant no.JPMJCR16O4 to K.M.)of the Japan ScienceTechnology Agency and by Cabinet Office,Government of Japan,Moonshot Research and Development Pro-gram for Agriculture,Forestry and Fisheries(funding agency:Bio-oriented Technology Research Advancement Institution,No.JPJ009237 to K.M.).
摘要Crop yield prediction is essential for effective agricultural management.We introduce a methodology for modeling the relationship between environmental parameters and crop yield in longitudinal crop cultivation,exemplified by strawberry and tomato production based on year-round cultivation.Employing functional data analysis(FDA),we developed a model to assess the impact of these factors on crop yield,particularly in the face of environmental fluctuation.Specifically,we demonstrated that a varying-coefficient functional regression model(VCFRM)is utilized to analyze time-series data,enabling to visualize seasonal shifts and the dynamic interplay between environmental conditions such as solar radiation and temperature and crop yield.The interpretability of our FDA-based model yields insights for optimizing growth parameters,thereby augmenting resource efficiency and sustainability.Our results demonstrate the feasibility of VCFRM-based yield modeling,offering strategies for stable,efficient crop production,pivotal in addressing the challenges of climate adaptability in plant factory-based horticulture.
基金Supported by the National Natural Science Foundation of China, No. 30370403the Key Project of Chinese Ministry of Education, No. 705046the Doctoral Foundation of Xi’an Jiaotong University, grants No. DFXJTU2005-05
摘要AIM: TO investigate the protein profile of human hepatocarcinoma cell line SMMC-7721, to analyze the specific functions of abundant expressed proteins in the processes of hepatocarcinoma genesis, growth and metastasis, to identify the hepatocarcinoma-specific biomarkers for the early prediction in diagnosis, and to explore the new drug targets for liver cancer therapy. METHODS: Total proteins from human hepatocarcinoma cell line SMMC-7721 were separated by two-dimensional electrophoresis (2DE). The silver-stained gel was analyzed by 2DE software Image Master 2D Elite. Interesting protein spots were identified by peptide mass fingerprinting based on matrix-assisted laser desorption/ ionization time-of-flight mass spectrometry (MALDI-TOF-MS) and database searching. RESULTS: We obtained protein profile of human hepatocarcinoma cell line SMMC-7721. Among the twenty-one successfully identified proteins, mitofilin, endoplasmic reticulum protein ERp29, ubiquinol-cytochrome C reductase complex core protein I, peroxisomal enoyl CoA hydratase, peroxiredoxin-4 and probable 3-oxoacid CoA transferase 1 precursor were the six novel proteins identified in human hepatocarcinoma cells or tissues. Specific functions of the identified heat-shock proteins were analyzed in detail, and the results suggested that these proteins might promote tumorigenesis via inhibiting cell death induced by several cancer-related stresses or via inhibiting apoptosis at multiple points in the apoptotic signal pathway. Other identified chaperones and cancer-related proteins were also analyzed.CONCLUSION: Based on the protein profile of SMMC-7721 cells, functional analysis suggests that the identified chaperones and cancer-related proteins have their own pathways to contribute to the tumorigenesis, tumor growth and metastasis of liver cancer. Furthermore, proteomic analysis is indicated to be feasible in the cancer study.
摘要Despite controversy regarding the clinical value of semen analysis, male fertility investigation still relies on a standardized analysis of the semen parameters. This is especially true for infertility clinics in both developing and developed countries. Other optional tests or sophisticated technologies have not been widely applied. The current review addresses important changes in the analysis of semen as described in the new World Health Organization (WHO) manual for semen analysis. The most important change in the manual is the use of evidence-based publications as references to determine cutoff values for normality. Apart from the above mentioned changes, the initial evaluation and handling methods remain, in most instances, the same as in previous editions. Furthermore, the review evaluates the importance of quality control in andrology with emphasis on the evaluation of sperm morphology. WHO sperm morphology training programmes for Sub-Saharan countries were initiated at Tygerberg Hospital in 1995. The external qualitY control programme has ensured that the majority of participants have maintained their morphological reading skills acquired during initial training. This review reports on current sperm functional tests, such as the induced acrosome reaction, and sperm-zona pellucida binding assays, as well as the impact of sperm quality in terms of DNA integrity, and the relationship of sperm function tests to sperm morphology.
基金supported by National Natural Science Foundation of China(Nos 31971686,32171838 and 32101558)Natural Science Foundation of Jiangsu Province(No.BK20210801).
摘要Ginkgo biloba is known for its abundance of secondary metabolites,such as terpenoids.However,the identification and functional analysis of key genes in the terpenoid biosynthetic pathway are limited.Geranylgeranyl pyrophosphate synthase(GGPPS)is a crucial enzyme involved in the production of terpenoids.In this study,we successfully cloned the GbGGPPS1 gene from G.biloba.The length of GbGGPPS1 was 1,176 bp,encoding 391 amino acids.The GbGGPPS1 protein contains the GGPPS protein domain,including the FARM and SAR motifs.Phylogenetic analysis revealed that GbGGPPS1 is closely related to gymnosperms.Furthermore,the expression of GbGGPPS1 was higher in leaves,stems,and ovules compared to the roots.Additionally,overexpression of GbGGPPS1 in Arabidopsis increased chlorophyll content and accelerated flowering process,indicating its role as a terpenoid synthase gene and plant development.Notably,the expression of GbGGPPS1 can be induced by salt stress,and overexpression of GbGGPPS1 in Arabidopsis exhibited enhanced seed germination under salt treatment.These results indicate that GbGGPPS1 plays an important role in plant growth,development,and salt stress resistance.
基金Supported by National Natural Science Foundation of China(Grant Nos.51135003,51205050,U1234208)Key National Science&Technology Special Project on"High-Grade CNC Machine Tools and Basic Manufacturing Equipments"(Grant No.2013ZX04011011)+1 种基金Research Fund for the Doctoral Program of Higher Education of China(Grant No.20110042120020)Fundamental Research Funds for the Central
摘要Reliability allocation of computerized numerical controlled(CNC)lathes is very important in industry.Traditional allocation methods only focus on high-failure rate components rather than moderate failure rate components,which is not applicable in some conditions.Aiming at solving the problem of CNC lathes reliability allocating,a comprehensive reliability allocation method based on cubic transformed functions of failure modes and effects analysis(FMEA)is presented.Firstly,conventional reliability allocation methods are introduced.Then the limitations of direct combination of comprehensive allocation method with the exponential transformed FMEA method are investigated.Subsequently,a cubic transformed function is established in order to overcome these limitations.Properties of the new transformed functions are discussed by considering the failure severity and the failure occurrence.Designers can choose appropriate transform amplitudes according to their requirements.Finally,a CNC lathe and a spindle system are used as an example to verify the new allocation method.Seven criteria are considered to compare the results of the new method with traditional methods.The allocation results indicate that the new method is more flexible than traditional methods.By employing the new cubic transformed function,the method covers a wider range of problems in CNC reliability allocation without losing the advantages of traditional methods.
基金supported by grants from the National Natural Science Foundation of China(Grant No.31960585)Science and Technology Major Project of Guangxi(Grant No.Guike AA22068092)+1 种基金Guangxi Science and Technology Vanguard Special Action Project(Grant No.202204)State Key Laboratory for Conservation and Utilization of Subtropical Agro-bioresources(Grant Nos.SKLCUSA-a201906,SKLCU-SA-c201901)。
摘要The SKP1 gene is an important component of the SCF(SKP1-Cullin1-F-box)complex and serves as a bridge connecting the F-box and Cullin1genes(F-box-SKP1-Cullin1).The pattern of S-RNase being ubiquitously labelled by the SCF complex and degraded by the 26S protease accounts for the bulk of the available self-incompatibility studies.In this study,15 ClSKP1s from the‘Xiangshui'lemon genome and ubiquitome exist in the same SKP1 conserved domain(CD)as SKP1s in other species.The q PCR results showed that SKP1-6 and SKP1-14 have tissue expression patterns specific for expression in pollen.In addition,SKP1-6 and SKP1-14 in the stigma,style and ovary were significantly upregulated after self-pollination compared to those after cross-pollination.A subcellular location showed that SKP1-6 and SKP1-14 were located in the nucleus.In addition,yeast two-hybrid(Y2H)assays,bimolecular fluorescence complementation(BiFC)and luciferase complementation imaging(LCI)assays showed that SKP1-6 interacted with F-box1,F-box33,F-box34,F-box17,F-box19,Cullin1-2 and 26S proteasome subunit 4 homolog A(26S PS4HA).SKP1-14 interacted with F-box17,F-box19,F-box35,Cullin1-2 and 26S PS4HA.The interaction of Cullin1-2 and the F-box with SKP1 as a bridge was verified by a yeast three-hybrid experiment.The ability of S3-RNase to inhibit pollen and pollen tube growth and development was assessed using in vitro pollen co-culture experiments with recombinant S3-RNase proteins.Overall,this study provides important experimental evidence and theoretical basis for understanding the mechanism of self-incompatibility in plants by revealing the key role of the SCF complex in‘Xiangshui'lemon,which is bridged by ClSKP1-6,in self-incompatibility.The results of this study are of great significance for the future indepth exploration of the molecular mechanism of the SCF complex and its wide application in the self-incompatibility of plants.