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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

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

Abscisic Acid-mediated Epigenetic Processes in plant development and Stress Responses

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Journal of Integrative plant Biology 2008年第10期50卷 1187-1195页

作者： Viswanathan Chinnusamy Zhizhong Gong Jian-Kang Zhu Water Technology Centre Indian Agricultural Research Institute New Delhi India State Key Laboratory of plant Physiology and Biochemistry College of Biological Sciences China Agricultural University Beijing 100094 China Department of Botany and plant Sciences University of California Riverside CA 92521 USA

Abscisic acid （ABA） regulates diverse plant processes, growth and development under non-stress conditions and plays a pivotal role in abiotic stress tolerance. Although ABA-regulated genetic processes are well known, recent discoveries reveal that epigenetic processes are an integral part of ABA-regulated processes. Epigenetic mechanisms, namely, histone modifications and cytosine DNA methylation-induced modification of genome give rise to epigenomes, which add diversity and complexity to the genome of organisms. Histone monoubiquitination appears to regulate ABA levels in developing seeds through histone H2B monoubiquitination. ABA and H2B ubiquitination dependent chromatin remodeling regulate seed dormancy. Transcription factor networks necessary for seed maturation are repressed by histone deacetylases （HDACs）-dependent and PICKLE chromatin remodeling complexes （CRCs）, whereas ABA induces the expression of these genes directly or through repression of HDACs. Abiotic stress-induced ABA regulates stomatal response and stress- responsive gene expression through HDACs and HOS15-dependent histone deacetylation, as well as through the ATP- dependent SWITCH/SUCROSE NONFERMENTING CRC. ABA also probably regulates the abiotic stress response through DNA methylation and short interfering RNA pathways. Further studies on ABA-regulated epigenome will be of immense use to understand the plant development, stress adaptation and stress memory.

关键词： abiotic stress memory abscisic acid chromatin remodeling DNA methylation histone deacetylases.

Regulation of microRNA on plant development and viral infection

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Chinese Science Bulletin 2006年第3期51卷 269-278页

作者： DUAN Chengguo WANG Chunhan GUO Huishan National Key Laboratory of plant Genomics Institute of MicrobiologyChinese Academy of Sciences Beijing 100080 China

MicroRNAs (miRNAs ) 是非编码规章的 RNAswhich 的约 22 nt 的一个班在优核质是通用的。他们为劈开或翻译压抑由 targetingmRNAs 充当基因表示的否定管理者。miRNAs 广泛地参予与植物联系的基因表示的规定发展过程，例如在植物的机关... 详细信息

MicroRNAs (miRNAs ) 是非编码规章的 RNAswhich 的约 22 nt 的一个班在优核质是通用的。他们为劈开或翻译压抑由 targetingmRNAs 充当基因表示的否定管理者。miRNAs 广泛地参予与植物联系的基因表示的规定发展过程，例如在植物的机关形态发生和 signaltransduction 小径。类似于在植物的抗病毒的 RNA silencing， miRNA 小径被 silencing 也介入压制病毒编码的 ors。在这评论，我们给调停 miRNA 的规章的小径和调停 siRNA 的 RNA silencing 之间的差别的一篇简短摘要。Inparticular，我们在 miRNA 上考察最近的研究规章的角色在种发展进程，以及干扰病毒在 miRNA 小径压制 ors，试图在真核细胞的有机体把卓见装入基因表达式规定的复杂性。

关键词：植物发育病毒感染 miRNAs 真核细胞 RNA抑制病毒抑制物

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

Selenium: A Game Changer in plant development, Growth, and Stress Tolerance, via the Modulation in Gene Expression and Secondary Metabolite Biosynthesis

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Phyton-International Journal of Experimental Botany 2023年第8期92卷 2301-2324页

作者： Ali Bandehagh Zahra Dehghanian Vahideh Gougerdchi Mohammad Anwar Hossain Department of plant Breeding and Biotechnology Faculty of AgricultureUniversity of TabrizTabriz51368Iran Department of Biotechnology Faculty of AgricultureAzarbaijan Shahid Madani UniversityTabriz51368Iran Department of Genetics and plant Breeding Bangladesh Agricultural UniversityMymensingh2202Bangladesh

The presence of selenium(Se)is not widely established as crucial for crops,although it is commonly recognized as an important nutrient for animals as well as *** so,it is inevitably accepted that Se usually contributes positively to the life cycle of ***ﬁndings suggested that small amounts of Se seem to have a productive role in growth and *** a result,Se is assumed to function in multiple ways,primarily by inﬂuencing a variety of biochemical and physiological ***,Se also acts as a plant antioxidant and pro-oxidant and confers tolerance against different abiotic stresses,including salinity,drought,extreme temperature,and toxic metals/metalloids *** reﬂects a defensive barrier against stress by increasing chlorophyll content synthesis,photosynthesis,oxygen supply,osmoprotectant concentration,and secondary metabolite *** other crucial role of Se is its ability to strengthen antioxidant performance in plants,thereby decreasing the concentration of reactive-oxygen-species(ROS).Furthermore,Se generates and modiﬁes genes and proteins that respond situationally to stress,and the presence of high Se concentrations in the growth-medium can cause phytotoxic conditions via excessive ROS production,and through pro-oxidative Se occurrence,suppression of chlorophyll contents in the biosynthetic pathway,and the inhibition of plant developmental and normal physiological *** a phytofortiﬁer,the correct amount of Se can indeed enhance the nutrient quality of both crop and fodder ***,crops have naturally developed ways to combat Se-deﬁciency and *** current review focuses on recent advances in understanding the dynamics of Se,the positive and negative roles of Se in crop management,and its efﬁciency in countering abiotic stress.

关键词： Gene expression phytohormones photosynthesis selenium secondary metabolites