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Phosphatidic acid plays key roles regulating plant development and stress responses

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Journal of Integrative plant Biology 2018年第9期60卷 851-863页

作者： Hong-Yan Yao Hong-Wei Xue National Key Laboratory of plant Molecular Genetics CAS Center for Excellence in Molecular Plant SciencesShanghai Institute of Plant Physiology and EcologyChinese Academy of SciencesShanghai 200032China

Phospholipids, including phosphatidic acid （PA）, phosphatidylcholine （PC）, phosphatidylethanolamine （PE）, phosphatidylglycerol （PC）, phosphatidylserine （PS） and phosphoinositides, have emerged as an important class of cellular messenger molecules in various cellular and physiological processes, of which PA attracts much attention of researchers. In addition to its effect on stimulating vesicle trafficking, many studies have demonstrated that PA plays a crucial role in various signaling pathways by binding target proteins and regulating their activity and subcellular localization. Here, we summarize the functional mechanisms and target proteins underlying PA-mediated regulation of cellular signaling, development, hormonal responses, and stress responses in plants.

关键词： PA ABA Phosphatidic acid plays key roles regulating plant development and stress responses

The Anaphase-Promoting Complex/Cyclosome in Control of plant development

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Molecular plant 2012年第6期5卷 1182-1194页

作者： Jefri Heyman Lieven De Veylder Department of plant Systems Biology VIB and Department of Plant Biotechnology and Bioinformatics Ghent University Technologiepark 927 B-9052Gent Belgium

Temporal controlled degradation of key cell division proteins ensures a correct onset of the different cell cycle phases and exit from the cell division program. In light of the cell cycle, the Anaphase-Promoting Complex/Cyclosome （APC/C） is an important conserved multi-subunit ubiquitin ligase, marking targets for degradation by the 26S protea- some. However, whereas the APC/C has been studied extensively in yeast and mammals, only in the last decade has the plant APC/C started to unveil its secrets. Research results have shown the importance of the APC/C core complex and its activators during gametogenesis, growth, hormone signaling, symbiotic interactions, and endoreduplication onset. In addition, recently, the first plant APC/C inhibitors have been reported, allowing a fine-tuning of APC/C activity during the cell cycle. Together with the identification of the first APC/C targets, a picture emerges of APC/C activity being essential for many different developmental processes.

关键词： cell cycle CDC20 CCS52 endoreduplication gametogenesis ubiquitination.

Arabidopsis AtBECLIN 1/AtAtg6/AtVps30 is essential for pollen germination and plant development

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Cell Research 2007年第3期17卷 249-263页

作者： Genji Qin~1 Zhiqiang Ma~1 Li Zhang~1 Shufan Xing~1 Xianhui Hou~1 Jie Deng~1 Jingjing Liu~1 Zhangliang Chen~(1,2) Li-Jia Qu~(1,2) Hongya Gu~(1,2) ~1National Laboratory for Protein Engineering and plant Genetic Engineering,Peking- Yale Joint Research Center for plant Molecular Genetics and AgroBiotechnology,College of Life Sciences,Peking University,Beijing 100871,China ~2The National plant Gene Research Center (Beijing),Beijing 100101,China National Laboratory for Protein Engineering and plant Genetic Engineering Peking-Yale Joint Research Center for Plant Molecular Genetics and AgroBiotechnology College of Life Sciences Peking University Beijing 100871 China The National plant Gene Research Center (Beijing) Beijing 100101 China

Pollen germination on the surtace ot compatible stigmatic tissues is an essential step tor plant *** wereport that the Arabidopsis mutant bcl1 is male sterile as a result of the failure of pollen *** show that the bcl1mutant allele cannot be transmitted by male gametophytes and no homozygous bcl1 mutants were *** ofpollen developmental stages indicates that the bcl1 mutation affects pollen germination but not pollen ***-lar analysis demonstrates that the failure of pollen germination was caused by the disruption of AtBECLIN ***1 is expressed predominantly in mature pollen and encodes a protein with significant homology to Beclin1/Atg6/Vps30required for the processes of autophagy and vacuolar protein sorting(VPS)in *** also show that AtBECLIN 1 isrequired for normal plant development,and that genes related to autophagy,VPS and the glycosylphosphatidylinositolanchor system,were affected by the deficiency of AtBECLIN 1.

关键词： Arabidopsis thaliana AtBECLIN 1 pollen germination plant normal development

AtWRKY1 at the intersection of plant development and defense: The cost of coping with adversity

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Molecular plant 2024年第10期17卷 1498-1500页

作者： Andreas M.Fischer Department of plant Sciences and plant Pathology Montana State UniversityBozemanMT59717-3150USA

The life cycle of many plants,including our most important crops,is short,with weeks to months between germination and *** plants flower only once,with seed/grain filling dependent on nutrient remobilization from senescing parental plants.A mature crop stand,such as a harvest-ready wheat field,is the result of mass suicide,with only the seeds/grains as living entities.

关键词： crops cost parental

Interplay of phytohormones and epigenetic regulation:A recipe for plant development and plasticity

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Journal of Integrative plant Biology 2023年第2期65卷 381-398页

作者： Kai Jiang Hongwei Guo Jixian Zhai Institute of plant and Food Science Key Laboratory of Molecular Design for Plant Cell Factory of Guangdong Higher Education InstitutesDepartment of BiologySchool of Life SciencesSouthern University of Science and Technology(SUSTech)Shenzhen 518055China

Both phytohormone signaling and epigenetic mechanisms have long been known to play crucial roles in plant development and plasticity in response to ambient ***,diverse signaling pathways mediated by phytohormones and epigenetic processes integrate multiple upstream signals to regulate various plant *** evidence indicates that phytohormones and epigenetic processes interact at multiple *** this review,we summarize the current knowledge of the interplay between phytohormones and epigenetic processes from the perspective of phytohormone *** also review chemical regulators used in epigenetic studies and propose strategies for developing novel regulators using multidisciplinary approaches.

关键词： chemical genetics epigenetics phytohormone plant growth and development plant growth regulator plasticity

Decoding the Epigenetic Language of plant development

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Molecular plant 2010年第4期3卷 719-728页

作者： Ayaz Ahmad Yong Zhang Xiao-Feng Cao State Key Laboratory of plant Genomics and National Center for plant Gene Research Institute of Genetics and Developmental Biology Chinese Academy of Sciences Beijing 100101 China Graduate University of the Chinese Academy of Sciences Yuquan Road Beijing 100039 China

Epigenetics refers to the study of heritable changes in gene expression or cellular phenotype without changes in DNA sequence. Epigenetic regulation of gene expression is accomplished by DNA methylation, histone modifications, histone variants, chromatin remodeling, and may involve small RNAs. DNA methylation at cytosine is carried out by enzymes called DNA Methyltransferases and is involved in many cellular processes, such as silencing of transposable elements and pericentromeric repeats, X-chromosome inactivation and genomic imprinting, etc. Histone modifications refer to posttranslational covalent attachment of chemical groups onto histones such as phosphorylation, acetylation, and methylation, etc. Histone variants, the non-canonical histones with amino acid sequences divergent from canonical histones, can have different epigenetic impacts on the genome from canonical histones. Higher-order chromatin structures maintained or modified by chromatin remodeling proteins also play important roles in regulating gene expression. Small non-coding RNAs play various roles in the regulation of gene expression at preas well as posttranscriptional levels. A special issue of Molecular plant on ＇Epigenetics and plant development＇（Volume 4, Number 2, 2009） published a variety of articles covering many aspects of epigenetic regulation of plant development. We have tried here to present a bird＇s-eye view of these credible efforts towards understanding the mysterious world of epigenetics. The majority of the articles are about the chromatin modifying proteins, including histone modifiers, histone variants, and chromatin remodeling pro- teins that regulate various developmental processes, such as flowering time, vernalization, stem cell maintenance, and response to hormonal and environmental stresses, etc. Regulation of expression of seed transcriptome, involvement of direct tandem repeat elements in the PHE1 imprinting in addition to PcG proteins activity, paramutation, and epige

关键词： Chromatin structure and remodeling epigenetics gene silencing flowering.

A nuclear-encoded mitochondrial gene AtCIB22 is essential for plant development in Arabidopsis

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Journal of Genetics and Genomics 2010年第10期37卷 667-683页

作者： Lihua Han Genji Qin Dingming Kang Zhangliang Chen Hongya Gu Li-Jia Qu College of Agronomy and Biotechnology China Agricultural University Beijing 100094 China National Laboratory of Protein Engineering and plant Genetic Engineering Peking University Beijing 100871 China The National plant Gene Research Center (Beijing) Beijing 100101 China

Complex I （the NADH：ubiquinone oxidoreductase） of the mitochondrial respiratory chain is a complicated, multi-subunit, membrane- bound assembly and contains more than 40 different proteins in higher plants. In this paper, we characterize the Arabidopsis homologue （designated as AtCIB22） of the B22 subunit of eukaryotic mitochondriai Complex I. AtCIB22 is a single-copy gene and is highly con- served throughout eukaryotes. AtCIB22 protein is located in mitochondria and the AtC1B22 gene is widely expressed in different tissues. Mutant Arabidopsis plants with a disrupted AtC1B22 gene display pleiotropic phenotypes including shorter roots, smaller plants and de- layed flowering. Stress analysis indicates that the AtC1B22 mutants＇ seed germination and early seedling growth are severely inhibited by sucrose deprivation stress but more tolerant to ethanol stress. Molecular analysis reveals that in moderate knockdown AtCIB22 mutants, genes including cell redox proteins and stress related proteins are significantly up-regulated, and that in severe knockdown AtCIB22 mu- tants, the alternative respiratory pathways including NDA1, NDB2, AOXla and AtPUMP1 are remarkably elevated. These data demon- strate that AtCIB22 is essential for plant development and mitochondrial electron transport chains in Arabidopsis. Our findings also en- hance our understanding about the physiological role of Complex I in plants.

关键词： mitochondria Complex I B22 subunit ethanol treatment alternative oxidase uncoupling protein

Epigenetic reprogramming by glucose-TOR signaling controls plant development

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Molecular plant 2022年第11期15卷 1651-1652页

作者： Fei Du State Key Laboratory of plant Genomics and National Center for plant Gene Research(Beijing) Institute of Genetics and Developmental BiologyThe Innovative Academy of Seed DesignChinese Academy of SciencesBeijing 100101China

Glucose,the typical photosynthetic product,functions not only as a universal nutrient but also as a regulatory signaling cue during plant *** evolutionally conserved Target of Rapamycin(TOR)kinase is a known master regulator that can be activated by glucose in coordinating multiple developmental programs with metabolic changes(Xiong et al.,2013).However,how glucose-TOR signaling affects specific gene sets involved in numerous regulatory networks during plant developmental transition and differentiation is not well understood.

关键词： plant programming networks

A lariat-derived circular RNA is required for plant development in Arabidopsis

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Science China(Life Sciences) 2018年第2期61卷 204-213页

作者： Jinping Cheng Yong Zhang Ziwei Li Taiyun Wang Xiaotuo Zhang Binglian Zheng State Key Laboratory of Genetic Engineering Collaborative Innovation Center for Genetics and Development School of Life SciencesFudan University

Lariat RNA is produced during pre-mRNA splicing, and it is traditionally thought as by-products, due to the quick turnover by debranching followed by degradation. However, recent findings identified many lariat RNAs accumulate with a circular form in higher eukaryotes. Although the remarkable accumulation, biological consequence of lariat-derived circular RNAs(here we name laciRNAs) remains largely unknown. Here, we report that a specific laciRNA from At5 g37720 plays an essential role in plant development by regulating gene expression globally. We focus on 17 laciRNAs with accumulation in wild type plants by circular RNA sequencing in Arabidopsis. To determine biological functions of these laciRNAs, we constructed one pair of transgenic plants for each laciRNA, in which the local gene with or without introns was over-expressed in wild type plants,respectively. By comparing morphological phenotypes and transcriptomic profiles between two classes of transgenic plants, we show that over-expression of the laciRNA derived from the 1 st intron of At5 g37720 causes pleiotropic phenotypes, including curly and clustered leaf, late flowering, reduced fertility, and accompanied with altered expression of approximately 800 *** results provide another example that a specific plant circular RNA regulates gene expression in a similar manner to that of other non-coding RNAs under physiological conditions.

关键词： lariat RNA circular RNA intron flowering time pleiotropic phenotype