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The miR159a-DUO1 module regulates pollen development by modulating auxin biosynthesis and starch metabolism in citrus

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Journal of Integrative Plant Biology 2024年第7期66卷 1351-1369页

作者： Yanhui Xu Wenxiu Tian Minqiang Yin Zhenmei Cai Li Zhang Deyi Yuan Hualin Yi Juxun Wu National key laboratory for Germplasm Innovation&Utilization of Horticultural Crops Huazhong Agricultural UniversityWuhan 430070China key laboratory of cultivation and protection for non‐wood forest Trees of the ministry of education and key laboratory of non‐wood forest Products of the forestry ministry Central South University of Forestry and TechnologyChangsha 410004China

Achieving seedlessness in citrus varieties is one of the important objectives of citrus *** sterility associated with abnormal pollen development is an important factor in ***,our understanding of the regulatory mechanism underlying the seedlessness phenotype in citrus is still ***,we determined that the miR159a-DUO1 module played an important role in regulating pollen development in citrus,which further indirectly modulated seed development and fruit *** the overexpression of csi-miR159a and the knocking out of DUO1 in Hong Kong kumquat(Fortunella hindsii)resulted in small and seedless fruit ***,pollen was severely aborted in both transgenic lines,with arrested pollen mitotic I and abnormal pollen starch *** additional cross-pollination experiments,DUO1 was proven to be the key target gene for miR159a to regulate male sterility in *** on DNA affinity purification sequencing(DAP-seq),RNA-seq,and verified interaction assays,YUC2/YUC6,SS4 and STP8 were identified as downstream target genes of DUO1,those were all positively regulated by *** transgenic *** lines,the miR159a-DUO1 module down-regulated the expression of YUC2/YUC6,which decreased indoleacetic acid(IAA)levels and modulated auxin signaling to repress pollen mitotic *** miR159a-DUO1 module reduced the expression of the starch synthesis gene SS4 and sugar transport gene STP8 to disrupt starch metabolism in ***,this work reveals a new mechanism by which the miR159a-DUO1 module regulates pollen development and elucidates the molecular regulatory network underlying male sterility in citrus.

关键词： auxin citrus male sterility miRNA pollen development seedlessness starch metabolism

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Ploidy and fruit trait variation in oil-tea Camellia:Implications for ploidy breeding

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Journal of Integrative Agriculture 2024年第8期23卷 2662-2673页

作者： Yanmin Li Liangjing Yin Xianyu He Cenlong Hu Ronghua Wu Qian Long Shixin Xiao Deyi Yuan key laboratory of cultivation and protection for non-wood forest Trees of ministry of education/key laboratory of non-wood forest Products of State forestry Administration Central South University of Forestry and TechnologyChangsha 410004China Qiandongnan Institute of forestry Qiandongnan Miao and Dong Autonomous Prefecture 556000China Dongfeng forest Farm of Liping County Qiandongnan Miao and Dong Autonomous Prefecture 557300China

Plant polyploidy often occurs in conjunction with higher yield and superior ***,obtaining polyploid germplasms is a significant part of *** oil-tea Camellia tree is an important native woody plant that produces high-quality edible oil and includes many species of Camellia with different ***,whether higher ploidy levels in oil-tea Camellia trees are related to better traits remains *** this study,the ploidy levels of 30 different oil-tea Camellia strains in three different species in the *** were determined by flow cytometry and chromosome preparation,and the phenotypic characteristics and fatty acid compositions of the fruits were examined by field observations and laboratory *** correlations between the ploidy level of oil-tea Camellia and the main traits of the fruit were *** results showed that 10 Camellia lanceoleosa strains were diploid,10 Camellia meiocarpa strains were tetraploid and 10 Camellia oleifera strains were *** *** had larger fruit size and weight,more seeds per fruit,greater seed weight per fruit,higher oil content and greater yield per crown width than tetraploid *** and diploid ***,but their fruit peel thickness and fresh seed rate were significantly lower,and these traits were significantly correlated with ploidy *** addition,in terms of fatty acid composition,hexaploid *** had a higher oleic acid content than tetraploid *** and diploid ***,but their linoleic acid,linolenic acid and arachidonic acid contents were *** contents of palmitic acid,stearic acid and total unsaturated fatty acids were not significantly correlated with ploidy *** conclusion,certain correlations exist between the main characteristics of oil-tea Camellia fruit and the ploidy level,and increasing the ploidy level led to an increase in fruit yield with no effect on oil *** discovery of variations in the m

关键词： oil-tea Camellia ploidy level fruit traits correlation polyploidization

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Flower development and sexual dimorphism in Vernicia montana

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Horticultural Plant Journal 2024年第2期10卷 586-600页

作者： Wenying Li Jingzhen Chen Xiang Dong Meilan Liu Guibin Wang Lin Zhang key laboratory of cultivation and protection for non-wood forest Trees Ministry of EducationCentral South University of Forestry and TechnologyChangshaHunan 410004China State key laboratory of Utilization of woody Oil Resource Hunan Academy of ForestryChangshaHunan 410004China College of forestry Nanjing Forestry UniversityNanjingJiangsu 210037China

The mu oil tree(Vernicia montana Lour.) is a dioecious species, but the genetic mechanisms underlying its phenotypic sexual dimorphism are unclear. In this study, we determined two pivotal phases of sex differentiation of mu oil tree via morphological and histological analyses of unisexual flowers:(Ⅰ) differentiation of male or female primordia to produce staminate flowers(SFs) or transient hermaphrodite flowers(HFs),and(Ⅱ) complete abortion of stamens in transient HFs to generate pistillate flowers(PFs). A total of 1621 sex-biased genes were identified by comparative transcriptome analysis which exhibited elevated rates of protein evolution than unbiased genes. The female-biased genes were enriched in the production of defense compounds while male-biased genes were focused on the production of viable pollens. Transcriptomebased analysis revealed that the differentially expressed genes(DEGs) between PFs and SFs in phase Ⅰ involved in abscisic acid(ABA), auxin(AUX), cytokinin(CK), ethylene(ET), and gibberellin(GA) biosynthesis and signaling showed higher expression levels in males than in females in general, whereas the DEGs involved in jasmonic acid(JA) and salicylic acid(SA) pathways displayed opposite expression patterns. Moreover,differentially expressed endogenous ABA, AUX, GAs, JA, and SA exhibited consistent biased expression patterns with the DEGs by UPLC-MSbased analysis. Exogenous application of an anti-ethylene plant growth regulator could promote the development of stamens in PFs and generated HFs. Comparative transcriptomic and hormonal analyses of PFs and SFs in phase Ⅱ indicated an increase in ET concentration when abortion of stamens in PFs occurred. This study suggested that phytohormones play key roles in sex dimorphism and ET may determine the development of stamens in PFs of mu oil tree, which provides an insight into plant sex differentiation mechanisms.

关键词： Mu oil tree Flower development Sexual dimorphism Sex bias Ethylene

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High temperature treatment induced production of unreduced 2n pollen in Camellia oleifera

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Horticultural Plant Journal 2024年第3期10卷 879-896页

作者： Hongda Deng Xiaoyu Zhang Song Sheng Yuxun Huang Ziqi Ye Tongyue Zhang Xing Liu Zhiqiang Han The laboratory of forestry Genetics Central South University of Forestry and TechnologyChangshaHunan 410004China Yuelushan laboratory ChangshaHunan 410128China key laboratory of cultivation and protection for non-wood forest Trees of ministry of education Central South University of Forestry and TechnologyChangshaHunan 410004China National forest and Seedling Workstation of Hunan Province The Forestry Department of Hunan ProvinceChangshaHunan 410004China

Unreduced gametes through chromosome doubling play a major role in the process of plant *** previous work confirmed that Camellia oleifera can produce natural 2n pollen,and it is possible to induce the 2n pollen formation by high temperature *** study focused on the optimization of the 2n pollen induction technique and the mechanisms of high temperature-induced2n pollen formation in *** found that the optimal protocol for inducing 2n pollen via high temperature was to perform 45℃with4 h at the prophaseⅠstage of the pollen mother cells(PMCs).Meanwhile,high temperature significantly decreased the yield and fertility of2n *** the observation of meiosis,abnormal chromosome and cytological behaviour was discovered under high-temperature treatment,and we confirmed that the formation of 2n pollen is caused by abnormal cell *** on weighted gene co-expression network analysis,fifteen hub genes related to cell cycle control were *** male flower buds were exposed to heat shock,polygalacturonase gene(CoPGX3)was significantly *** inferred that high temperature causes the CoPGX3 gene to be overexpressed and that CoPGX3 is redistributed into the cytosol where it degrades cytoplasmic pectin,which leads to an abnormal cell ***,abnormal cytokinesis resulted in the formation of dyads and triads,and PMCs divided to produce 2n *** findings provide new insights into the mechanism of 2n pollen induced by high temperature in a woody plant and lay a foundation for further ploidy breeding of ***.

关键词： Camellia oleifera Pollen mother cells(PMCs) High temperature Meiosis 2n pollen CoPGX3

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Rice Bran-derived Peptide KF-8 Attenuates Dexamethasone-induced Myopathy in Caenorhabditis elegans by Regulating Locomotion-related Genes

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Food Science and Human Wellness 2024年

作者： Yixin Wu Jianqiang Wang Fang Huang Yajuan Chen Qinlu Lin Zhongxu Chen Zhigang Liu Yao Jiang Wenqing Xie Hengzhen Li Yusheng Li Ying Liang National Clinical Research Center for Geriatric Disorders， Xiangya Hospital， Central South University Molecular Nutrition Branch， National Engineering Research Center of Rice and By-product Deep Processing， College of Food Science and Engineering， Central South University of forestry and Technology laboratory of Functional Chemistry and Nutrition of Food， College of Food Science and Engineering， Northwest A&F University the key lab of non-wood forest cultivation and protection of education ministry， The key lab of non-wood forest Products of forestry ministry， forestry Institute， Central South University of forestry & Technology Department of Orthopedics， Xiangya Hospital， Central South University

Background and aims: Dexamethasone is a common glucocorticoid medication with adverse effects that can cause muscle atrophy， but no drug intervention has been approved or recommended for this condition. KF-8 is a rice bran-derived anti-oxidant peptide that extends the life span of Caenorhabditis elegans. Methods: We established a C. elegans model of dexamethasone-induced myopathy to evaluate the potential therapeutic effects of KF-8 in this model. C. elegans muscle function was assessed in terms of locomotory behaviors including crawling， swimming， burrowing， pharyngeal pumping， and head swing. Muscle actin filament integrity was evaluated using fluorescence imaging. The molecular mechanisms of KF-8 were investigated using transcriptome sequencing， qRT-PCR， RNA interference， and western blot analysis. Results: Dexamethasone disrupted actin filaments in the striated muscles of the body wall and inhibited C. elegans crawling， swimming， burrowing， pharyngeal pumping， and head swing. KF-8 reversed the actin filament disruption and locomotor dysfunction induced by dexamethasone. Transcriptome sequencing， pathway enrichment， and qRT-PCR analyses revealed that KF-8 regulated the locomotion-related genes W04G5.10， vha-12， and ddr-1， as well as age-1 (the catalytic subunit ortholog of PI3K)， and akt1. RNA interference， conducted using a genetically engineered E. coli HT115 strain as a food source， confirmed age-1 as a key regulator of locomotor function of C. elegans. Further mechanistic studies with C2C12 myotubes showed that KF-8 regulated the IRS-PI3K-Akt pathway， the master regulator of protein synthesis and degradation. Conclusion: Together， these findings suggest that KF-8 protects against dexamethasone-induced myopathy in C. elegans by regulating locomotion-related genes and the IRS-PI3K-Akt pathway.

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Integration of semi-in vivo assays and multi-omics data reveals the effect of galloylated catechins on self-pollen tube inhibition in Camellia oleifera

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Horticulture Research 2023年第1期10卷 260-273页

作者： Yihong Chang Wenfang Gong Jinming Xu Han Gong Qiling Song Shixin Xiao Deyi Yuan key laboratory of cultivation and protection for non-wood forest Trees of the ministry of education and key laboratory of non-wood forest Products of the forestry ministry Central South University of Forestry and TechnologyChangshaHunan 410004China

Camellia oil extracted from the seeds of Camellia oleifera *** a popular and high-quality edible oil,but its yield is limited by seed setting,which is mainly caused by self-incompatibility(SI).One of the obvious biological features of SI plants is the inhibition of self-pollen tubes;however,the underlying mechanism of this inhibition in *** is poorly *** this study,we constructed a semi-in vivo pollen tube growth test(SIV-PGT)system that can screen for substances that inhibit self-pollen tubes without interference from the genetic *** with multi-omics analysis,the results revealed the important role of galloylated catechins in self-pollen tube inhibition,and a possible molecular regulatory network mediated by UDP-glycosyltransferase(UGT)and serine carboxypeptidase-like(SCPL)was *** summary,galloylation of catechins and high levels of galloylated catechins are specifically involved in pollen tube inhibition under self-pollination rather than cross-pollination,which provides a new understanding of SI in *** results will contribute to sexual reproduction research on *** and provide theoretical support for improving Camellia oil yield in production.

关键词： vivo oleifera Integration

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Emission and optical characteristics of brown carbon in size-segregated particles from three types of Chinese ships

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Journal of Environmental Sciences 2024年第8期142卷 248-258页

作者： Fengqin Yang Fan Zhang Zeyu Liu Yingjun Chen Yan Zhang Can Wu Yali Lei Shijie Liu Binyu Xiao Xinyi Wan Yubao Chen Yong Han Min Cui Cheng Huang Gehui Wang key lab of Geographic Information Science of the ministry of education School of Geographic SciencesEast China Normal UniversityShanghai 200241China Institute of Eco-Chongming 20 Cuiniao Rd.ChongmingShanghai 202150China State Environmental protection key laboratory of Formation and Prevention of the Urban Air Pollution Complex Shanghai Academy of Environmental SciencesShanghai 200233China Shanghai key laboratory of Atmospheric Particle Pollution and Prevention(LAP3) Department of Environmental Science and EngineeringFudan UniversityShanghai 200438China Shanghai Institute of Pollution Control and Ecological Security Shanghai 200092China Department of Civil and Environmental Engineering and State key laboratory of Marine Pollution The Hong Kong Polytechnic UniversityKowloon 100872Hong KongChina College of Environmental Science and Engineering Yangzhou UniversityYangzhou 225009China

Brown carbon(BrC)is one of the important light absorption substances that have high light absorption ability under short wavelength ***,limit studies have focused on the BrC emission from *** this study,size-segregated particulate matters(PM)were collected from three different types of ships,light absorption characteristics and size distribution of methanol-soluble BrC and water-soluble BrC in PM from ship exhausts were *** showed that four-stroke low-power diesel fishing boat(4-LDF)had the highest mass concentrations of methanol-soluble organic carbon(MSOC)and water-soluble organic carbon(WSOC),followed by 2-stroke high-power heavy-fuel-oil vessel(2-HHV),and fourstroke high-power marine-diesel vessel(4-HMV).While 2-HHV had obviously higher light absorption coefficients of methanol-soluble BrC(Abs365,M)and water-soluble BrC(Abs365,W)in unit weight of PM than the other two types of *** tested ships presented comparable or higher absorption efficiency of BrC in water extracts(MAE365,W)compared with other BrC emission *** of BrC was concentrated in fine particles,and the particle size distributions of both Abs365,Mand Abs365,Wshowed bimodal patterns,peaking at0.43–0.65μm and 4.7–5.8μm,***,different particle size distributions were found for MAE365,Mbetween diesel and heavy fuel oil ***,different wavelength dependence in particles with different size were also *** exhaust could be confirmed as a non-ignorable BrC emission source,and complex influencing factor could affect the light absorption characteristics of ship *** size should also be considered when light absorption ability of BrC was evaluated.

关键词： Ship emission Brown carbon Light absorption Size distribution

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Gradient sparsification for efficient wireless federated learning with differential privacy

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Science China(Information Sciences) 2024年第4期67卷 272-288页

作者： Kang WEI Jun LI Chuan MA Ming DING Feng SHU Haitao ZHAO Wen CHEN Hongbo ZHU School of Electronic and Optical Engineering Nanjing University of Science and Technology Zhejiang lab key laboratory of Computer Network and Information Integration(Southeast University) Ministry of Education Data61 Commonwealth Scientific and Industrial Research Organisation School of Information and Communication Engineering Hainan University School of Communications and Information Engineering Nanjing University of Posts and Telecommunications School of Electronic Information and Electrical Engineering Shanghai Jiao Tong University

Federated learning(FL) enables distributed clients to collaboratively train a machine learning model without sharing raw data with each other. However, it suffers from the leakage of private information from uploading models. In addition, as the model size grows, the training latency increases due to the limited transmission bandwidth and model performance degradation while using differential privacy(DP)protection. In this paper, we propose a gradient sparsification empowered FL framework with DP over wireless channels, to improve training efficiency without sacrificing convergence performance. Specifically, we first design a random sparsification algorithm to retain a fraction of the gradient elements in each client’s local model, thereby mitigating the performance degradation induced by DP and reducing the number of transmission parameters over wireless channels. Then, we analyze the convergence bound of the proposed algorithm, by modeling a non-convex FL problem. Next, we formulate a time-sequential stochastic optimization problem for minimizing the developed convergence bound, under the constraints of transmit power, the average transmitting delay, as well as the client’s DP requirement. Utilizing the Lyapunov drift-plus-penalty framework, we develop an analytical solution to the optimization problem. Extensive experiments have been implemented on three real-life datasets to demonstrate the effectiveness of our proposed algorithm. We show that our proposed algorithms can fully exploit the interworking between communication and computation to outperform the baselines, i.e., random scheduling, round robin, and delay-minimization algorithms.

关键词： federated learning differential privacy gradient sparsification Lyapunov drift convergence analysis

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Two new species of Hartigia Schidte from China(Hymenoptera:Cephidae)

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Zoological Systematics 2015年第2期40卷 223-227页

作者： Geng-Yun Niu Wei Xiao Mei-Cai Wei key laboratory of cultivation and protection for non–wood forest Trees(Central South University of forestry and Technology) Ministry of Education

Two new species of Hartigia Schiodte, 1838 from China are described： H. maculothoracica sp. nov. from Xinjiang and H. fuscicosta sp. nov. from Jilin. A diagnosis of Hartigia and a key to Hartigia maculothoracica and ... 详细信息

关键词： Cephidae Hartigiinae Hartigia new species China.

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AcWRKY28 mediated activation of AcCPK genes confers salt tolerance in pineapple(Ananas comosus)

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Horticultural Plant Journal 2024年第2期10卷 398-412页

作者： Qiao Zhou Samaranayaka Vidana Gamage Nirosha Priyadarshani Rongjuan Qin Han Cheng Tiantian Luo Myat Hnin Wai Mohammad Aqa Mohammadi Yanhui Liu Chang Liu Hanyang Cai Xiaomei Wang Yeqiang Liu Yuan Qin Lulu Wang Guangxi key lab of Sugarcane Biology State Key Laboratory for Conservation and Utilization of Subtropical Agro-BioresourcesCollege of AgricultureGuangxi UniversityNanningGuangxi 530004China State key laboratory of Ecological Pest Control for Fujian and Taiwan Crops College of Life ScienceCollege of Plant ProtectionCollege of AgricultureCollege of HorticultureFujian Provincial Key Laboratory of Haixia Applied Plant Systems BiologyCenter for Genomics and BiotechnologyFujian Agriculture and Forestry UniversityFuzhouFujian 350002China Pingtan Science and Technology Research Institute of Fujian Agriculture and forestry University PingtanFujian 350400China National education Commission BMICHColombo00700Sri Lanka Fishery Multiplication Management Station of Lijiang River Water Supply Hub Project GuilinGuangxi 541001China Horticulture Research Institute Guangxi Academy of Agricultural SciencesNanning Investigation Station of South Subtropical Fruit TreesMinistry of AgricultureNanningGuangxi 530007China

Unfavorable environmental cues severely affect crop productivity resulting in significant economic losses to farmers. In plants, multiple regulatory genes, such as the WRKY transcription factor (TF) family, modulate the expression of defense genes. However, the role of the pineapple WRKY genes is poorly understood. Here, we studied the pineapple WRKY gene, AcWRKY28, by generating AcWRKY28 over-expressing transgenic pineapple plants. Overexpression of AcWRKY28 enhanced the salt stress resistance in transgenic pineapple lines. Comparative transcriptome analysis of transgenic and wild-type pineapple plants showed that “plant-pathogen interaction” pathway genes, including 9calcium-dependent protein kinases (CPKs), were up-regulated in AcWRKY28 over-expressing plants. Furthermore, chromatin immunoprecipitation and yeast one-hybrid assays revealed AcCPK12, AcCPK3, AcCPK8, AcCPK1, and AcCPK15 as direct targets of AcWRKY28. Consistently, the study of AcCPK12 over-expressing Arabidopsis lines showed that AcCPK12 enhances salt, drought, and disease resistance. This study shows that AcWRKY28 plays a crucial role in promoting salt stress resistance by activating the expression of AcCPK genes.

关键词： Pineapple AcWRKY AcCPK Transcription factor Salt stress ChIP

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