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Rab-H_1b is essential for trafficking of cellulose synthase and for hypocotyl growth in Arabidopsis thaliana

Journal of Integrative plant biology 2018年第11期60卷 1051-1069页

作者： Ming He Miao Lan Baocai Zhang Yihua Zhou Youqun Wang Lei Zhu Ming Yuan Ying Fu State Key Laboratory of plant Physiology and Biochemistry College of Biological Sciences China Agricultural University State Key Laboratory of plant Genomics and National plant Gene Research Center Institute of Genetics and Developmental Biologythe Chinese Academy of Sciences

Ceil-wall deposition of cellulose microfibrils is essential for plant growth and development. In plant cells, cellulose synthesis is accomplished by cellulose synthase complexes located in the plasma membrane. Trafficking of the complex between endomembrane compartments and the plasma membrane is vital for cellulose biosynthesis; however, the mechanism for this process is not well understood. We here report that, in Arabidopsis thaliana, Rab-H1b, a Golgi-localized small GTPase, participates in the trafficking of CELLULOSE SYNTHASE 6 （CESA6） to the plasma membrane. Loss of Rab-Hlb function resulted in altered distribution and motility of CESA6 in the plasma membrane and reduced cellulose content. Seedlings with this defect exhibited short, fragile etiolated *** of CESA6 was impaired in rab-Mb cells, and endocytosis in mutant cells was significantly reduced as well. We further observed accumulation of vesicles around an abnormal Golgi apparatus having an increased number of cisternae in rab-Mb cells, suggesting a defect in cisternal homeostasis caused by Rab-Hlb loss function. Our findings link Rab GTPases to cellulose biosynthesis, during hypo- cotyl growth, and suggest Rab-Hlb is crucial for modulating the trafficking of cellulose synthase complexes between endomembrane compartments and the plasma membrane and for maintaining Golgi organization and morphology.

关键词： Rab-H1b is essential for trafficking of cellulose synthase and for hypocotyl growth in Arabidopsis thaliana

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Genetic insights into adaptation of alfalfa

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Molecular plant 2024年第8期17卷 1170-1171页

作者： Yafei Guo Lipeng Kang Fei Lu State Key Laboratory of plant Cell and Chromosome Engineering Institute of Genetics and Developmental BiologyChinese Academy of SciencesBeijingChina Key Laboratory of Seed Innovation Institute of Genetics and Developmental BiologyChineseAcademyof SciencesBeijingChina University of Chinese Academy of Sciences BeijingChina CAS-JIC Centre of Excellence for plant and Microbial Science(CEPAMS) Institute of Genetics and Developmental BiologyChinese Academy of SciencesBeijingChina

Climate change is increasingly affecting agricultural outputs,as evidenced by the changing global temperature and extreme weather events that significantly impact crop yields(Lesk et al.,2016).To address this challenge,there is a growing interest in developing crops that can endure these adverse conditions to ensure food *** examples in nature show how crops have adapted to diverse environments(Gutaker and Purugganan,2023),leaving behind a rich genomic *** genomics has started to provide insights into these adaptive processes from evolutionary and genetic perspectives(Savolainen et al.,2013;Aguirre-Liguori et al.,2021;Sang et al.,2022).Recently,Zhang et al.(Zhang et al.,2024)investigated alfalfa(Medicago sativa ***),known as the"queen of forages,"for its broad *** analyzing whole-genome sequencing data of 702 accessions from 24 Medicago species,this study enriches our understanding of how to develop crops and meet the challenges of climate change.

关键词： sativa crops environments

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Drought Stress Impairs Grain Yield and Quality of Rice Genotypes by Impaired Photosynthetic Attributes and K Nutrition

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Rice science 2020年第1期27卷 5-9页

作者： Muhammad Zahid MUMTAZ Muhammad SAQIB Ghulam ABBAS Javaid AKHTAR Zia Ul-QAMAR institute of Soil and Environmental Sciences University of Agriculture institute of Molecular biology and Biotechnology The University of Lahore Department of Environmental Sciences COMSATS University plant Breeding and genetics Division Nuclear Institute for Agriculture and Biology

Drought is one of the most prevalent abiotic stresses that adversely affect rice productivity(Petrozza et al, 2014). Rice is very sensitive to drought stress and drought can cause 50% reduction in rice production globally(Yang et al, 2008). To meet the food needs for global population, 63% more agricultural production will be required by the year 2050 than.

关键词： drought Yield globally

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Understanding the genetic and epigenetic architecture in complex network of rice flowering pathways

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Protein & Cell 2014年第12期5卷 889-898页

作者： Changhui Sun Dan Chen Jun Fang Pingrong Wang Xiaojian Deng Chengcai Chu Rice Research institute Sichuan Agricultural University Chengdu 611130 China State Key Laboratory of plant Genomics and Center for plant Gene Research (Beijing) Institute of Genetics and Developmental Biology Chinese Academy of Sciences Beijing 100101 China

Although the molecular basis of flowering time control is well dissected in the long day （LD） plant Arabidopsis, it is still largely unknown in the short day （SD） plant rice. Rice flowering time （heading date） is an important agronomic trait for season adaption and grain yield, which is affected by both genetic and environmental factors. During the last decade, as the nature of florigen was identified, notable progress has been made on exploration how florigen gene ,expression is genetically controlled. In Arabidopsis expression of certain key flowering integrators such as FLOWERING LOCUS C （FLC） and FLOWERING LOCUS T （FT） are also epige- netically regulated by various chromatin modifications, however, very little is known in rice on this aspect until very recently. This review summarized the advances of both genetic networks and chromatin modifications in rice flowering time control, attempting to give a complete view of the genetic and epigenetic architecture in complex network of rice flowering pathways.

关键词： rice flowering time genetic network,chromatin modifications Arabidopsis florigen

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RLKs orchestrate the signaling in plant male-female interaction

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Science China(Life Sciences) 2016年第9期59卷 867-877页

作者： Hongju Li Wei-Cai Yang State Key Laboratory of Molecular Developmental biology Institute of Genetics and Developmental Biology Chinese Academy of Sciences

Different from animals, sessile plants are equipped with a large receptor-like kinase(RLK) superfamily. RLKs are a family of single trans-membrane proteins with divergent N-terminal extracellular domains capped by a signal peptide and C-terminal intracellular kinase. Researches in the last two decades have uncovered an increasing number of RLKs that regulate plant development, stress response and sexual reproduction, highlighting a dominant role of RLK signaling in cell-to-cell communications. Sexual reproduction in flowering plants is featured by interactions between the male gametophyte and the female tissues to facilitate sperm delivery and fertilization. Emerging evidences suggest that RLKs regulate almost every aspect of plant reproductive process, especially during pollination. Therefore, in this review we will focus mainly on the function and signaling of RLKs in plant male-female interaction and discuss the future prospects on these topics.

关键词： RLK signaling plant reproduction pollen tube female gametophyte male-female interaction pollen tube growth and guidance pollen tube reception

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Improvement on Mixograph test through water addition and parameter conversions

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Journal of Integrative Agriculture 2015年第9期14卷 1715-1722页

作者： SUN Jia-zhu YANG Wen-long LIU Dong-cheng ZHAO Jun-tao LUO Guang-bin LI Xin LIU Yan-jun GU O Jin-kao ZHANG Ai-min State Key Laboratory of plant Cell and Chromosome Engineering Institute of Genetics and Developmental BiologyChinese Academy of Sciences Zhaoxian institute of Agricultural Sciences Shijiazhuang Academy of Agriculture and Forestry Sciences

To improve Mixograph testing effect, Farinograph measurements were adopted as a quality standard and changes in water absorption and parameter conversion in Mixograph test were explored. Comparative study showed that increasing water absorption to about 73% and converting original parameters to compound parameters in Mixograph tests signiifcantly increased their predictive power for lfour quality. These efforts also enabled the adoption of ifxed water addition level in Mixograph test and simpliifed the test procedure signiifcantly. With the success in parameter conversions, Mixograph test results were successful y described by Farinograph parameters, which al ow breeders to compare and exchange test results easily. Al these changes optimized the ofifcial method of Mixograph test with simpliifed procedure and enhanced reliability and made the Mixograph being the superior tool for quality assessment in wheat-breeding programs.

关键词： Mixograph water absorption compound parameter constant water addition parameter conversion

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A Rice NBS-ARC Gene Conferring Quantitative Resistance to Bacterial Blight Is Regulated by a Pathogen Effector-Inducible miRNA

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Molecular plant 2020年第12期13卷 1752-1767页

作者： Guanghuai Jiang Dongfeng Liu Dedong Yin Zhuangzhi Zhou Yue Shi Chunrong Li Lihuana Zhu and Wenxue Zhai institute of genetics and Developmental biology Chinese Academy of SciencesBeijing 100101China Key Laboratory of plant Molecular Physiology Institute of BotanyChinese Academy of SciencesBeijing 100093China

The bacterium Xanthomonas oryzae ***(Xoo)causes blight in rice worldwide,resulting in signifi-cant crop ***,no gene underlying a quantitative trait locus(QTL)for resistance against Xoo has been cloned ***,we report the map-based cloning of a QTL,in which the NBS8R gene confers quantitative resistance to ***8R encodes an NB-ARC protein,which is involved in pathogen/microbe-associated molecular pattern-triggered immunity and whose expression is regulated by non-TAL effector XopQ-inducible Osa-miR1876 through DNA *** analysis of NBS8R in wild rice species and rice cultivars suggests that the Osa-miR1876 binding sites in the 5'UTR of NBS8R are inserted by chance and have undergone variations with Osa-miR1876 throughout *** inter-action between NBS8R and XopQ-inducible Osa-miR1876 is partially in keeping with the zigzag model,revealing that quantitative genes may also follow this model to control the innate immune response or basal disease resistance,and may prove valuable in utilizing the existing landraces that harbor the NBS8R gene but with no Osa-miR1876 binding site in rice breeding for bacterial blight resistance.

关键词： quantitative trait locus disease resistance bacterial blight NB-ARC microRNA DNA methylation

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OsMPK4 promotes phosphorylation and degradation of IPA1 in response to salt stress to confer salt tolerance in rice

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Journal of genetics and Genomics 2022年第8期49卷 766-775页

作者： Meiru Jia Nan Luo Xiangbing Meng Xiaoguang Song Yanhui Jing Liquan Kou Guifu Liu Xiahe Huang Yingchun Wang Jiayang Li Bing Wang Hong Yu State Key Laboratory of plant Genomics and National Center for plant Gene Research Institute of Genetics and Developmental BiologyInnovation Academy for Seed DesignChinese Academy of SciencesBeijing 100101China University of Chinese Academy of Sciences Beijing 100049China State Key Laboratory of Molecular Developmental biology Institute of Genetics and Developmental BiologyInnovation Academy for Seed DesignChinese Academy of SciencesBeijing 100101China

Salt stress adversely affects plant growth,development,and crop ***(Oryza sativa L.)is one of the most salt-sensitive cereal crops,especially at the early seedling ***-activated protein kinase(MAPK/MPK)cascades have been shown to play critical roles in salt response in ***,the roles of the MPK cascade signaling in rice salt response and substrates of Os MPK remain largely ***,we report that the salt-induced Os MPK4-Ideal plant Architecture 1(IPA1)signaling pathway regulates the salt tolerance in *** salt stress,Os MPK4 could interact with IPA1 and phosphorylate IPA1 at Thr180,leading to degradation of *** evidence shows that IPA1 is a negative regulator of salt tolerance in rice,whereas Os MPK4 promotes salt response in an IPA1-dependent *** together,our results uncover an Os MPK4-IPA1 signal cascade that modulates the salt stress response in rice and sheds new light on the breeding of salt-tolerant rice varieties.

关键词： Oryza sativa MPK OsMPK4 IPA1 Salt tolerance

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The editing sites in transcripts of functional genes of rice mitochondria

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Chinese Science Bulletin 2002年第11期47卷 906-909页

作者： Yl Ping WANG Li SUN Qingping ZHU Yingguo Key Laboratory of MOE for plant Developmental biology and institute of genetics College of Life SciencesWuhan UniversityWuhan 430072China

RNA editing exists extensively in the higher plant mitochondria, and is a required step for forming functional proteins. There may be some relationship between RNA editing and cytoplasmic male sterility (CMS), a kind of phenomenon that is attributed to mitochondrial genome mutations. The research materials used are the gametophytic male sterility line (A), maintainer line (B) and F1 hybrid (F1) of HL-type CMS rice. cDNAs and DNAs of atp6 and coxII have been obtained from A, B and F1 by PCR and RT-PCR. Comparing sequences of cDNAs and DNAs, 18 and 15 editing sites were found respectively in the transcripts of atp6 and coxll. A, B and F1 shared the same editing sites. RNA editing improves hydrophobicity and conservation of the predicted protein as compared with other organisms.

关键词： mitochondria RNA editing editing sites cytoplasmic male sterility.

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Advances in the regulation and crosstalks of phytohormones

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Chinese Science Bulletin 2009年第22期54卷 4069-4082页

作者： XIONG GuoSheng LI JiaYang WANG YongHong State Key Laboratory of plant Genomics and National Center for plant Gene Research (Beijing) Institute of Genetics and Deve-lopmental Biology Chinese Academy of Sciences Beijing 100101 China

Various mutants defective in phytohormone biosynthesis and signaling pathways have been identified and characterized recently. Functional analysis of corresponding genes has greatly enriched our knowledge of phytohormone biosynthesis, transport, and signal transduction. Moreover, identification of phytohormone receptors and dissection of cross-talks among phytohormones allow us to elucidate the molecular basis of actions of phytohormones. The recent comprehensive work on the regulation of the biosynthesis, transport and signaling of phytohormones will help us to understand phytohormone actions in plant growth and development and their potential application in crop improvement. In this review, we summarize the latest work about phytohormones actions and highlight some common issues in this field.

关键词：激素调节植物激素串扰激素合成信号途径信号转导分子基础生物合成

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