title: Bacterial chemoattraction towards jasmonate plays a role in the entry of Dickeya dadantii through wounded tissues.
abstract: Jasmonate is a key signalling compound in plant defence that is synthesized in wounded tissues. In this work, we have found that this molecule is also a strong chemoattractant for the phythopathogenic bacteria Dickeya dadantii (ex-Erwinia chysanthemi). Jasmonic acid induced the expression of a subset of bacterial genes possibly involved in virulence/survival in the plant apoplast and bacterial cells pre-treated with jasmonate showed increased virulence in chicory and Saintpaulia leaves. We also showed that tissue wounding induced bacterial spread through the leaf surface. Moreover, the jasmonate-deficient aos1 Arabidopsis thaliana mutant was more resistant to bacterial invasion by D. dadantii than wild-type plants. These results are consistent with the hypothesis that sensing jasmonic acid by this bacterium helps the pathogen to ingress inside plant tissues.
authors.affiliation: Centro de Biotecnología y Genómica de Plantas (CBGP), Departamento de Biotecnología. E. T. S. Ingenieros Agrónomos. Universidad Politécnica de Madrid, 28040 Madrid, Spain.
authors.forename: Maria
authors.initials: M
authors.lastname: Antunez-Lamas
authors.forename: Ezequiel
authors.initials: E
authors.lastname: Cabrera
authors.forename: Emilia
authors.initials: E
authors.lastname: Lopez-Solanilla
authors.forename: Roberto
authors.initials: R
authors.lastname: Solano
authors.forename: Pablo
authors.initials: P
authors.lastname: González-Melendi
authors.forename: Jose Manuel
authors.initials: JM
authors.lastname: Chico
authors.forename: Ian
authors.initials: I
authors.lastname: Toth
authors.forename: Paul
authors.initials: P
authors.lastname: Birch
authors.forename: Leighton
authors.initials: L
authors.lastname: Pritchard
authors.forename: Leighton
authors.initials: L
authors.lastname: Prichard
authors.forename: Hui
authors.initials: H
authors.lastname: Liu
authors.forename: Pablo
authors.initials: P
authors.lastname: Rodriguez-Palenzuela
mesh_terms: D017360:Arabidopsis / Q000235:genetics / Q000378:metabolism; D001426:Bacterial Proteins / Q000235:genetics / Q000378:metabolism; D013437:Carbon-Sulfur Lyases / Q000235:genetics / Q000378:metabolism; D002633:Chemotaxis / Q000187:drug effects*; D018651:Cichorium intybus / Q000235:genetics / Q000378:metabolism / Q000382:microbiology; D003517:Cyclopentanes / Q000494:pharmacology*; D004755:Enterobacteriaceae / Q000235:genetics / Q000472:pathogenicity / Q000502:physiology*; D015964:Gene Expression Regulation, Bacterial; D053263:Gene Regulatory Networks; D005798:Genes, Bacterial; D016680:Genome, Bacterial; D007506:Iron-Sulfur Proteins / Q000235:genetics / Q000378:metabolism; D019684:Magnoliopsida / Q000235:genetics / Q000378:metabolism; D009154:Mutation; D054883:Oxylipins / Q000494:pharmacology*; D010935:Plant Diseases / Q000235:genetics / Q000382:microbiology; D018515:Plant Leaves / Q000235:genetics / Q000378:metabolism / Q000382:microbiology; D010944:Plants / Q000235:genetics / Q000378:metabolism; D012329:RNA, Bacterial / Q000235:genetics; D012097:Repressor Proteins / Q000235:genetics / Q000378:metabolism; D015398:Signal Transduction / Q000235:genetics; D014774:Virulence / Q000235:genetics; D037521:Virulence Factors / Q000235:genetics
chemical_list: D001426:Bacterial Proteins; D003517:Cyclopentanes; D007506:Iron-Sulfur Proteins; D054883:Oxylipins; D012329:RNA, Bacterial; D012097:Repressor Proteins; D037521:Virulence Factors; C011006:jasmonic acid; D013437:Carbon-Sulfur Lyases