检索结果-南通市图书馆

Epigenetic regulation of plant immunity:from chromatin codes to plant disease resistance

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

aBIOTECH 2023年第2期4卷 124-139页

作者： Si-Si Xie Cheng-Guo Duan shanghai center for plant stress biology and cas center for excellence in molecular plant sciences Chinese Academy of SciencesShanghai 200032China University of the Chinese Academy of sciences Beijing 100049China

Facing a deteriorating natural environment and an increasing serious food crisis,bioengineering-based breeding is increasing in importance.To defend against pathogen infection,plants have evolved multiple defense mechanisms,including pathogen-associated molecular pattern(PAMP)-triggered immunity(PTI)and effector-triggered immunity(ETI).A complex regulatory network acts downstream of these PTI and ETI pathways,including hormone signal transduction and transcriptional reprogramming.In recent years,increasing lines of evidence show that epigenetic factors act,as key regulators involved in the transcriptional reprogramming,to modulate plant immune responses.Here,we summarize current progress on the regulatory mechanism of DNA methylation and histone modifications in plant defense responses.In addition,we also discuss the application of epigenetic mechanism-based resistance strategies in plant disease breeding.

关键词： Histone modification DNA methylation Transcriptional reprogramming plant immunity Disease resistance

The MEKK1-MKK1/2-MPK4 cascade phosphorylates and stabilizes STOP1 to confer aluminum resistance in Arabidopsis

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

molecular plant 2023年第2期16卷 337-353页

作者： Fanglin Zhou Somesh Singh Jie Zhang Qiu Fang Chongyang Li Jiawen Wang Chunzhao Zhao Pengcheng Wang Chao-Feng Huang National Key Laboratory of plant molecular Genetics Shanghai Center for Plant Stress BiologyCAS Center for Excellence in Molecular Plant SciencesShanghai Institute of Plant Physiology and EcologyChinese Academy of SciencesShanghai 200032China University of the Chinese Academy of sciences Beijing 100049Cnina

Aluminum(Al)toxicity can seriously restrict crop production on acidic soils,which comprise 40%of the world’s potentially arable land.The zinc finger transcription factor STOP1 has a conserved and essential function in mediating plant Al resistance.Al stress induces STOP1 accumulation via post-transcriptional regulatory mechanisms.However,the upstream signaling pathway involved in Al-triggered STOP1 accumulation remains unclear.Here,we report that the MEKK1-MKK1/2-MPK4 cascade positively regulates STOP1 phosphorylation and stability.Mutations of MEKK1,MKK1/2,or MPK4 lead to decreased STOP1 stability and Al resistance.Al stress induces the kinase activity of MPK4,which interacts with and phosphorylates STOP1.The phosphorylation of STOP1 reduces its interaction with the F-box protein RAE1 that mediates STOP1 degradation,thereby leading to enhanced STOP1 stability and Al resistance.Taken together,our results suggest that the MEKK1-MKK1/2-MPK4 cascade is important for Al signaling and confers Al resistance through phosphorylation-mediated enhancement of STOP1 accumulation in Arabidopsis.

关键词： aluminum resistance Arabidopsis thaliana MAPK cascade MPK4 STOP1 phosphorylation STOP1 stability

A bacterial effector protein uncovers a plant metabolic pathway involved in tolerance to bacterial wilt disease

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

molecular plant 2021年第8期14卷 1281-1296页

作者： Yaru Wang Achen Zhao Rafael J.L.Morcillo Gang Yu Hao Xue Jose S.Rufian Yuying Sang Alberto P.Macho shanghai center for plant stress biology CAS Center for Excellence in Molecular Plant Sciences/Chinese Academy of SciencesShanghai 201602China University of Chinese Academy of sciences BeijingChina

Bacterial wilt caused by the soil-borne plant pathogen Ralstonia solanacearum is a devastating disease worldwide.Upon plant colonization,R.solanacearum replicates massively,causing plant wilting and death;collapsed infected tissues then serve as a source of inoculum.In this work,we show that the plant metabolic pathway mediated by pyruvate decarboxylases(PDCs)contributes to plant tolerance to bacterial wilt disease.Arabidopsis and tomato plants resp ond to R.solanacearum infection by in creasing PDC activity,and plants with deficient PDC activity are more susceptible to bacterial wilt.Treatment with either pyruvic acid or acetic acid(substrate and product of the PDC pathway,respectively)enhances plant tolerance to bacterial wilt disease.An effector protein secreted by R.solanacearum,RipAK,interacts with PDCs and inhibits their oligomerization and enzymatic activity.Collectively,our work reveals a metabolic pathway involved in plant resistance to biotic and abiotic stresses,and a bacterial virulence strategy to promote disease and the completion of the pathogenic life cycle.

关键词： pyruvate decarboxylase pyruvic acid acetic acid bacterial wilt Ralstonia solanacearum type-Ⅲeffector

A novel mitochondrial protein is required for cell wall integrity,auxin accumulation and root elongation in Arabidopsis under salt stress

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

stress biology 2022年第1期2卷 530-544页

作者： Zheping Yu Yuying Ren Jianwei Liu Jian-Kang Zhu Chunzhao Zhao Institute of Horticulture Zhejiang Academy of Agricultural SciencesHangzhou 310021China shanghai center for plant stress biology CAS Center for Excellence in Molecular Plant SciencesChinese Academy of SciencesShanghai 200032China

Maintenance of root elongation is beneficial for the growth and survival of plants under salt stress,but currently the cellular components involved in the regulation of root growth under high salinity are not fully understood.In this study,we identified an Arabidopsis mutant,rres1,which exhibited reduced root elongation under treatment of a variety of salts,including NaCl,NaNO3,KCl,and KNO3.RRES1 encodes a novel mitochondrial protein and its molecular function is still unknown.Under salt stress,the root meristem length was shorter in the rres1 mutant compared to the wild type,which was correlated with a reduced auxin accumulation in the mutant.Reactive oxygen species(ROS),as important signals that regulate root elongation,were accumulated to higher levels in the rres1 mutant than the wild type after salt treatment.Measurement of monosaccharides in the cell wall showed that arabinose and xylose contents were decreased in the rres1 mutant under salt stress,and application of boric acid,which is required for the crosslinking of pectic polysaccharide rhamnogalacturonan-II(RG-II),largely rescued the root growth arrest of the rres1 mutant,suggesting that RRES1 participates in the maintenance of cell wall integrity under salt stress.GUS staining assay indicated that the RRES1 gene was expressed in leaves and weakly in root tip under normal conditions,but its expression was dramatically increased in leaves and roots after salt treatment.Together,our study reveals a novel mitochondrial protein that regulates root elongation under salt stress via the modulation of cell wall integrity,auxin accumulation,and ROS homeostasis.

关键词： Salt stress Auxin Reactive oxygen species plant cell wall Arabidopsis

Experiencing winter for spring flowering: A molecular epigenetic perspective on vernalization

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Journal of Integrative plant biology 2020年第1期62卷 104-117页

作者： Xiao Luo Yuehui He National Key Laboratory of plant molecular Genetics & shanghai center for plant stress biology Center for Excellence in Molecular Plant Sciences The Chinese Academy of Sciences

Many over-wintering plants, through vernalization, overcome a block to flowering and thus acquire competence to flower in the following spring after experiencing prolonged cold exposure or winter cold. The vernalization pathways in different angiosperm lineages appear to have convergently evolved to adapt to temperate climates. molecular and epigenetic mechanisms for vernalization regulation have been well studied in the crucifer model plant Arabidopsis thaliana.Here, we review recent progresses on the vernalization pathway in Arabidopsis. In addition, we summarize current molecular and genetic understandings of vernalization regulation in temperate grasses including wheat and Brachypodium, two monocots from Pooideae, followed by a brief discussion on divergence of the vernalization pathways between Brassicaceae and Pooideae.

关键词： winter spring temperate

维普期刊数据库

The mechanism and function of active DNA demethylation in plants

在线全文

学校读者我要写书评

暂无评论

Journal of Integrative plant biology 2020年第1期62卷 148-159页

作者： Ruie Liu Zhaobo Lang shanghai center for plant stress biology and National Key Laboratory of Plant Molecular Genetics Center of Excellence in Molecular Plant Sciences the Chinese Academy of Sciences

DNA methylation is a conserved and important epigenetic mark in both mammals and plants.DNA methylation can be dynamically established,maintained,and removed through different pathways.In plants,active DNA demethylation is initiated by the RELEASE OF SILENCING 1(ROS1)family of bifunctional DNA glycosylases/lyases.Accumulating evidence suggests that DNA demethylation is important in many processes in plants.In this review,we summarize recent studies on the enzymes and regulatory factors that have been identified in the DNA demethylation pathway.We also review the functions of active DNA demethylation in plant development as well as biotic and abiotic stress responses.Finally,we highlight those aspects of DNA demethylation that require additional research.

关键词： removed maintained initiated

维普期刊数据库

Ca^(2+) signaling in plant manganese uptake:CPK21/23 kinases phosphorylate and activate manganese transporter NRAMP1

在线全文

学校读者我要写书评

暂无评论

stress biology 2022年第1期2卷 169-171页

作者： Chao‑Feng Huang National Key Laboratory of plant molecular Genetics Shanghai Center for Plant Stress BiologyCAS Center for Excellence in Molecular Plant SciencesShanghai Institute of Plant Physiology and EcologyChinese Academy of SciencesShanghai 200032China

This brief article highlights the results of Fu et al.(Proc Natl Acad Sci USA 119:e2204574119,2022),who recently found that manganese(Mn)deficiency triggers long-lasting multicellular Ca^(2+) oscillations in the elongation zone(EZ)of Arabidopsis roots and revealed a Ca^(2+)-CPK21/23-NRAMP1 axis as an important mechanism for plant tolerance and adaptation to low Mn.

关键词： Manganese deficiency Ca^(2+)signaling Ca^(2+)-dependent protein kinase(CPK) NRAMP1 phosphorylation

plant latent defense response to microbial non-pathogenic factors antagonizes compatibility

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

National Science Review 2022年第8期9卷 26-34页

作者： Yu Yang Shenglan Chen Xiaoxuan Wu Li Peng Juan I.Vílchez Richa Kaushal Xiaomin Liu Sunil K.Singh Danxia He Fengtong Yuan Suhui Lv Rafael J.L.Morcillo Wei Wang Weichang Huang Mingguang Lei Jian-Kang Zhu Paul W.Paré Huiming Zhang shanghai center for plant stress biology Center for Excellence in Molecular Plant Sciences Chinese Academy of Sciences University of Chinese Academy of sciences shanghai Chenshan Botanical Garden Department of Chemistry and Biochemistry Texas Tech University

Unlike microbe-associated molecular patterns(MAMPs) that are readily targeted by host immunity,microbial non-pathogenic factors(NPFs) appear negligible as they do not elicit defense. Little is known about whether and how NPFs may be monitored by hosts to control compatibility. Herein, a forward genetic screening isolated an Arabidopsis mutant with a loss of plant-rhizobacteria mutualism, leading to the disclosure of a plant latent defense response(LDR) to NPFs. The activation of LDR in the mutant,named rol1 for regulator of LDR 1, is triggered by several non-pathogenic volatile organic compounds and antagonizes plant compatibility with the beneficial bacterium Bacillus amyloliquefaciens GB03. The activation of LDR in rol1 is mediated through the prokaryotic pathway of chloroplastic lipid biosynthesis.The rol1 root microbiome showed a reduced proportion of the Bacillaceae family. We propose that, parallel to the forefront immunity to MAMPs, LDR to certain NPFs provides a hidden layer of defense for controlling compatibility with commensal or beneficial microbes.

关键词： microbial non-pathogenic factors latent defense response compatibility plant-beneficial bacteria chloroplastic lipid biosynthesis

Promotion of Arabidopsis immune responses by a rhizosphere fungus via supply of pipecolic acid to plants and selective augment of phytoalexins

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Science China(Life sciences) 2023年第5期66卷 1119-1133页

作者： Feifei Luo Guirong Tang Song Hong Tianyu Gong Xiu-Fang Xin Chengshu Wang Key Laboratory of Insect Developmental and Evolutionary biology CAS Center for Excellence in Molecular Plant SciencesShanghai Institute of Plant Physiology and EcologyChinese Academy of SciencesShanghai 200032China cas center for excellence in Biotic Interactions University of Chinese Academy of SciencesBeijing 100049China 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 School of Life Science and Technology ShanghaiTech UniversityShanghai 201210China

The ascomycete insect pathogenic fungi such as Metarhizium species have been demonstrated with the abilities to form the rhizosphere or endophytic relationships with different plants for nutrient exchanges.In this study,after the evident infeasibility of bacterial disease development in the boxed sterile soils,we established a hydroponic system for the gnotobiotic growth of Arabidopsis thaliana with the wild-type and transgenic strain of Metarhizium robertsii.The transgenic fungus could produce a high amount of pipecolic acid(PIP),a pivotal plant-immune-stimulating metabolite.Fungal inoculation experiments showed that M.robertsii could form a non-selective rhizosphere relationship with Arabidopsis.Similar to the PIP uptake by plants after exogenous application,PIP level increased in Col-0 and could be detected in the PIP-non-producing Arabidopsis mutant(ald1)after fungal inoculations,indicating that plants can absorb the PIP produced by fungi.The transgenic fungal strain had a better efficacy than the wild type to defend plants against the bacterial pathogen and aphid attacks.Contrary to ald1,fmo1 plants could not be boosted to resist bacterial infection after treatments.After fungal inoculations,the phytoalexins camalexin and aliphatic glucosinolate were selectively increased in Arabidopsis via both PIP-dependent and-independent ways.This study unveils the potential mechanism of the fungus-mediated beneficial promotion of plant immunity against biological stresses.The data also highlight the added values of M.robertsii to plants beyond the direct suppression of insect pest populations.

关键词： Metarhizium robertsi rhizosphere fungus pipecolic acid camalexin aliphatic glucosinolate plant defenses

维普期刊数据库