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Abscisic acid dynamics, signaling, and functions in plants

Journal of Integrative Plant Biology 2020年第1期62卷 25-54页

作者： Kong Chen Guo-Jun Li ray abressan Chun-Peng Song Jian-Kang Zhu Yang Zhao Shanghai Center for Plant Stress Biology and CAS Center of Excellence in Molecular Plant Sciences Chinese Academy of SciencesShanghai 200032China University of Chinese Academy of Sciences Beijing 100049China Department of Horticulture and Landscape Architecture Purdue UniversityWest LafayetteIN 47907USA State Key Laboratory of Crop Stress Adaptation and Improvement School of Life SciencesHenan UniversityKaifeng 475001China

Abscisic acid(ABA)is an important phytohormone regulating plant growth,development,and stress responses.It has an essential role in multiple physiological processes of plants,such as stomatal closure,cuticular wax accumulation,leaf senescence,bud dormancy,seed germination,osmotic regulation,and growth inhibition among many others.Abscisic acid controls downstream responses to abiotic and biotic environmental changes through both transcriptional and posttranscriptional mechanisms.During the past 20 years,ABA biosynthesis and many of its signaling pathways have been well characterized.Here we review the dynamics of ABA metabolic pools and signaling that affects many of its physiological functions.

关键词： dynamics closure functions

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Non-CG DNA methylation-deficiency mutations enhance mutagenesis rates during salt adaptation in cultured Arabidopsis cells

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Stress Biology 2021年第1期1卷 144-155页

作者： Xiaohong Zhu Shaojun Xie Kai Tang Rajwant KKalia Na Liu Jinbiao Ma ray abressan Jian-Kang Zhu State Key Laboratory of Crop Stress Adaptation and Improvement School of Life SciencesHenan UniversityKaifengChina State Key Laboratory of Cotton Biology School of Life SciencesHenan UniversityKaifengChina Bioinformatics Core Purdue UniversityWest LafayetteIN 47907USA Department of Horticulture and Landscape Architecture Purdue UniversityWest LafayetteIN 47907USA Central Arid Zone Research Institute Jodhpur 342003India State Key Laboratory for Managing Biotic and Chemical Threats to the Quality and Safety of Agro-Products Institute of VegetablesZhejiang Academy of Agricultural SciencesHangzhou 310021China State Key Laboratory of Desert and Oasis Ecology Xinjiang Institute of Ecology and GeographyChinese Academy of Sciences 830011UrumqiChina Shanghai Center for Plant Stress Biology Shanghai Institutes for Biological SciencesChinese Academy of SciencesShanghai 200032China

Much has been learned about how plants acclimate to stressful environments,but the molecular basis of stress adaptation and the potential involvement of epigenetic regulation remain poorly understood.Here,we examined if salt stress induces mutagenesis in suspension cultured plant cells and if DNA methylation affects the mutagenesis using whole genome resequencing analysis.We generated suspension cell cultures from two Arabidopsis DNA methylation-deficient mutants and wild-type plants,and subjected the cultured cells to stepwise increases in salt stress intensity over 40 culture cycles.We show that ddc(drm1 drm2 cmt3)mutant cells can adapt to grow in 175 mM NaCl-containing growth medium and exhibit higher adaptability compared to wild type Col-0 and nrpe1 cells,which can adapt to grow in only 125mM NaCl-containing growth medium.Salt treated nrpe1 and ddc cells but not wild type cells accumulate more mutations compared with their respective untreated cells.There is no enrichment of stress responsive genes in the list of mutated genes in salt treated cells compared to the list of mutated genes in untreated cells.Our results suggest that DNA methylation prevents the induction of mutagenesis by salt stress in plant cells during stress adaptation.

关键词： Salt stress Cell suspension DNA methylation-deficient mutants Stress-induced mutagenesis Stress adaptation

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Rheostatic Control of ABA Signaling through HOS15-Mediated OST1 Degradation

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Molecular Plant 2019年第11期12卷 1447-1462页

作者： Akhtar Ali Jae Kyoung Kim Masood Jan Haris Ali Khan Irfan Ullah Khan Mingzhe Shen Junghoon Park Chae Jin Lim Shah Hussain Dongwon Baek Kai Wang Woo Sik Chung Vicente Rubio Sang Yeol Lee Zhizhong Gong Woe Yeon Kim ray abressan Jose MPardo Dae-Jin Yun Department of Biomedical Science&Engineering Konkuk UniversitySeoul 05029South Korea Department of Mathematical Sciences Korea Advanced Institute of Science and TechnologyDaejeon 34131Korea Division of Applied Life Science Plant Molecular Biology and Biotechnology Research CenterGyeongsang National UniversityJinju 660-701South Korea State Key Laboratory of Plant Physiology and Biochemistry College of Biological SciencesChina Agricultural UniversityBeijing 100193China Centro Nacional de Biotecnologia-CSIC Darwin 3.Campus de la UAM.Cantoblanco28049 MadridSpain Department of Horticulture and Landscape Architecture Purdue University625 Agriculture Mall DriveWest LafayetteIN 47907-2010USA lnstituto de Bioquimica Vegetal y Fotosintesis cicCartujaCSIC-Universidad de SevillaAmericoVespucio 49Sevilla 41092Spain

Dehydrating stresses trigger the accumulation of abscisic acid(ABA),a key plant stress-signaling hormone that activates Snf1-Related Kinases(SnRK2s)to mount adaptive responses.However,the regulatory circuits that terminate the SnRK2s signal relay after acclimation or post-stress conditions remain to be defined.Here,we show that the desensitization of the ABA signal is achieved by the regulation of OST1(SnRK2.6)protein stability via the E3-ubiquitin ligase HOS15.Upon ABA signal,HOS15-induced degradation of OST1 is inhibited and stabilized OST1 promotes the stress response.When the ABA signal terminates,protein phosphatases ABI1/2 promote rapid degradation of OST1 via HOS15.Notably,we found that even in the presence of ABA,OST1 levels are also depleted within hours of ABA signal onset.The unexpected dynamics of OST1 abundance are then resolved by systematic mathematical modeling,demonstrating a desensitizing feedback loop by which OST1-induced upregulation of ABI1/2 leads to the degradation of OST1.This model illustrates the complex rheostat dynamics underlying the ABA-induced stress response and desensitization.

关键词： ABA signaling drought stress HOS15 OST1 ABI1/2 protein degradation and stability

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Publisher Correction: Non-CG DNA methylation-deficiency mutations enhance mutagenesis rates during salt adaptation in cultured Arabidopsis cells

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Stress Biology 2021年第1期1卷 202-202页

作者： Xiaohong Zhu Shaojun Xie Kai Tang Rajwant KKalia Na Liu Jinbiao Ma ray abressan Jian-Kang Zhu State Key Laboratory of Crop Stress Adaptation and Improvement School of Life SciencesHenan UniversityKaifengChina State Key Laboratory of Cotton Biology School of Life SciencesHenan UniversityKaifengChina Bioinformatics Core Purdue UniversityWest LafayetteIN 47907USA Department of Horticulture and Landscape Architecture Purdue UniversityWest LafayetteIN 47907USA Central Arid Zone Research Institute Jodhpur 342003India State Key Laboratory for Managing Biotic and Chemical Threats to the Quality and Safety of Agro-Products Institute of VegetablesZhejiang Academy of Agricultural SciencesHangzhou 310021China State Key Laboratory of Desert and Oasis Ecology Xinjiang Institute of Ecology and GeographyChinese Academy of SciencesUrumqi 830011China Shanghai Center for Plant Stress Biology Shanghai Institutes for Biological SciencesChinese Academy of SciencesShanghai 200032China

Following publication of this article(Zhu et al.2021),it is noticed that the article contained an error.The affiliation of the author ray A.Bressan should be below:4.Department of Horticulture and Landscape Architecture,Purdue University,West Lafayette,IN 47907,USA.The author ray A.Bressan’s affiliation has been updated in this Correction,and the original article has been updated as well.

关键词： DNA Following Arabidopsis

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