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An atypical NLR gene confers bacterial wilt susceptibility in Arabidopsis

Plant Communications 2023年第5期4卷 277-294页

作者： choghag demirjian Narjes Razavi Gang Yu Baptiste Mayjonade Lu Zhang Fabien Lonjon Fabien Chardon Se bastien Carrere Je rome Gouzy Ste phane Genin Alberto PMacho Fabrice Roux Richard Berthome Fabienne Vailleau LIPME Universite de ToulouseINRAECNRSCastanet-TolosanFrance Shanghai Center for Plant Stress Biology CAS Center for Excellence in Molecular Plant SciencesChinese Academy of SciencesShanghaiChina Universite Paris-Saclay INRAEAgroParisTechInstitut Jean-Pierre Bourgin(IJPB)78000 VersaillesFrance Present address:Department of Cell&Systems Biology University of TorontoTorontoONCanada Present address:Department of Biology NYU12 Waverly PlaceNew YorkNY 10003USA

Quantitative disease resistance(QDR)remains the most prevalent form of plant resistance in crop fields and wild ***-wide association studies(GWAS)have proved to be successful in deciphering the quantitative genetic basis of complex traits such as *** unravel the genetics of QDR to the devastating worldwide bacterial pathogen Ralstonia solanacearum,we performed a GWAS by challenging a highly polymorphic local mapping population of Arabidopsis thaliana with four *** type III effector(T3E)mutants,identified as key pathogenicity determinants after a first screen on an *** core collection of 25 *** most quantitative trait loci(QTLs)were highly specific to the identity of the T3E mutant(ripAC,ripAG,ripAQ,and ripU),we finely mapped a common QTL located on a cluster of nucleotide-binding domain and leucine-rich repeat(NLR)genes that exhibited structural *** functionally validated one of these NLRs as a susceptibility factor in response to ***,named it Bacterial Wilt Susceptibility 1(BWS1),and cloned two alleles that conferred contrasting levels of *** characterization indicated that expression of BWS1 leads to suppression of immunity triggered by different *** *** addition,we showed a direct interaction between BWS1 and RipAC T3E,and BWS1 and SUPPRESSOR OF G2 ALLELE OF skp1(SGT1b),the latter interaction being suppressed by ***,our results highlight a putative role for BWS1 as a quantitative susceptibility factor directly targeted by the T3E RipAC,mediating negative regulation of the SGT1-dependent immune response.

关键词： Ralstonia solanacearum typeⅢeffectors Arabidopsis thaliana GWAS R gene susceptibility

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