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Perception of unrelated microbe-associated molecular patterns triggers conserved yet variable physiological and transcriptional changes in Brassica rapa ***

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Horticulture Research 2020年第1期7卷 331-342页

作者： Wanhui Kim maxim prokchorchik Yonghua Tian Seulgi Kim Hyelim Jeon Cécile Segonzac Department of Plant Science Plant Genomics and Breeding Institute and Research Institute of Agriculture and Life SciencesSeoul National UniversitySeoul 08826Republic of Korea Plant Immunity Research Center Seoul National UniversitySeoul 08826Republic of Korea Life Sciences Department Pohang University of Science and TechnologyPohang 37673Republic of Korea Department of Agriculture Forestry and BioresourcesSeoul National UniversitySeoul 08826Republic of Korea

Pattern-triggered immunity(PTI)includes the different transcriptional and physiological responses that enable plants to ward off microbial ***-localized pattern-recognition receptors(PRRs)recognize conserved microbeassociated molecular patterns(MAMPs)and initiate a branched signaling cascade that culminate in an effective restriction of pathogen *** the model species Arabidopsis thaliana,early PTI events triggered by different PRRs are broadly conserved although their nature or intensity is dependent on the origin and features of the detected *** order to provide a functional basis for disease resistance in leafy vegetable crops,we surveyed the conservation of PTI events in Brassica rapa *** identified the PRR homologs present in *** genome and found that only one of the two copies of the bacterial Elongation factor-Tu receptor(EFR)might *** also characterized the extent and unexpected specificity of the transcriptional changes occurring when *** seedlings are treated with two unrelated MAMPs,the bacterial flagellin flg22 peptide and the fungal cell wall component ***,using a MAMP-induced protection assay,we could show that bacterial and fungal MAMPs elicit a robust immunity in ***,despite significant differences in the kinetic and amplitude of the early signaling *** data support the relevance of PTI for crop protection and highlight specific functional target for disease resistance breeding in Brassica crops.

关键词： breeding crops immunity

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Direct acetylation of a conserved threonine of RIN4 by the bacterial effector HopZ5 or AvrBsT activates RPM1-dependent immunity in Arabidopsis

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Molecular Plant 2021年第11期14卷 1951-1960页

作者： Arabidopsis Sera Choi maxim prokchorchik Hyeonjung Lee Ravi Gupta Yoonyoung Lee Eui-Hwan Chung Buhyeon Cho Min-Sung Kim Sun Tae Kim Kee Hoon Sohn Department of Life Sciences Pohang University of Science and TechnologyPohang 37673Republic of Korea School of Interdisciplinary Bioscience and Bioengineering Pohang University of Science and TechnologyPohang 37673Republic of Korea Department of Plant Bioscience Life and Industry Convergence Research InstitutePusan National UniversityMiryang 50463Republic of Korea Department of Botany School of Chemical and Life SciencesJamia HamdardHamdard NagarNew Delhi 110062India Division of Biotechnology Korea UniversitySeoul 02841Republic of Korea The Institute of Crop Science and Resource Conservation(INRES) University of BonnNussallee 953115 BonnGermany

Plant pathogenic bacteria deliver effectors into plant cells to suppress immunity and promote pathogen survival;however, these effectors can be recognised by plant disease resistance (R) proteins to activate innate immunity. The bacterial acetyltransferase effectors HopZ5 and AvrBsT trigger immunity in Arabidopsis thaliana genotypes lacking SUPPRESSOR OF AVRBST-ELICITED RESISTANCE 1 (SOBER1). Using an Arabidopsis accession, Tscha-1, that naturally lacks functional SOBER1 but is unable to recognise HopZ5, we demonstrate that RESISTANCE TO P. SYRINGAE PV MACULICOLA 1 (RPM1) and RPM1-INTERACTING PROTEIN 4 (RIN4) are indispensable for HopZ5- or AvrBsT-triggered immunity. Remarkably, T166 of RIN4, the phosphorylation of which is induced by AvrB and AvrRpm1, was directly acetylated by HopZ5 and AvrBsT. Furthermore, we demonstrate that the acetylation of RIN4 T166 is required and sufficient for HopZ5- or AvrBsT-triggered RPM1-dependent defence activation. Finally, we show that SOBER1 interferes with HopZ5- or AvrBsT-triggered immunity by deacetylating RIN4 T166. We have thus elucidated detailed molecular mechanisms underlying the activation and suppression of plant innate immunity triggered by two bacterial acetyltransferases, HopZ5 and AvrBsT from different bacterial pathogens.

关键词： Acetyltransferase effectors Effector-triggered immunity Immunity suppressors NLR Plant deacetylase Plant immunity

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