Abscisic acid-induced resistance against the brown spot pathogen Cochliobolus miyabeanus in rice involves MAP kinase-mediated repression of ethylene signaling

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cg.contributor.affiliationGhent Universityen
cg.contributor.affiliationPennsylvania State Universityen
cg.contributor.affiliationInternational Rice Research Instituteen
cg.identifier.doihttps://doi.org/10.1104/pp.109.152702en
cg.issn1532-2548en
cg.issue4en
cg.journalPLANT PHYSIOLOGYen
cg.volume152en
dc.contributor.authorDe Vleesschauwer, Daviden
dc.contributor.authorYang, Yinongen
dc.contributor.authorVera Cruz, Casianaen
dc.contributor.authorHöfte, Monicaen
dc.date.accessioned2024-12-19T12:55:48Zen
dc.date.available2024-12-19T12:55:48Zen
dc.identifier.urihttps://hdl.handle.net/10568/166076
dc.titleAbscisic acid-induced resistance against the brown spot pathogen Cochliobolus miyabeanus in rice involves MAP kinase-mediated repression of ethylene signalingen
dcterms.abstractThe plant hormone abscisic acid (ABA) is involved in an array of plant processes, including the regulation of gene expression during adaptive responses to various environmental cues. Apart from its well-established role in abiotic stress adaptation, emerging evidence indicates that ABA is also prominently involved in the regulation and integration of pathogen defense responses. Here, we demonstrate that exogenously administered ABA enhances basal resistance of rice (Oryza sativa) against the brown spot-causing ascomycete Cochliobolus miyabeanus. Microscopic analysis of early infection events in control and ABA-treated plants revealed that this ABA-inducible resistance (ABA-IR) is based on restriction of fungal progression in the mesophyll. We also show that ABA-IR does not rely on boosted expression of salicylic acid-, jasmonic acid -, or callose-dependent resistance mechanisms but, instead, requires a functional Gα-protein. In addition, several lines of evidence are presented suggesting that ABA steers its positive effect on brown spot resistance through antagonistic cross talk with the ethylene (ET) response pathway. Exogenous ethephon application enhances susceptibility, whereas genetic disruption of ET signaling renders plants less vulnerable to C. miyabeanus attack, thereby inducing a level of resistance similar to that observed on ABA-treated wild-type plants. Moreover, ABA treatment alleviates C. miyabeanus-induced activation of the ET reporter gene EBP89, while derepression of pathogen-triggered EBP89 transcription via RNA interference-mediated knockdown of OsMPK5, an ABA-primed mitogen-activated protein kinase gene, compromises ABA-IR. Collectively, these data favor a model whereby exogenous ABA enhances resistance against C. miyabeanus at least in part by suppressing pathogen-induced ET action in an OsMPK5-dependent manner.en
dcterms.accessRightsOpen Access
dcterms.available2010-02-03
dcterms.bibliographicCitationDe Vleesschauwer, David; Yang, Yinong; Vera Cruz, Casiana and Höfte, Monica. 2010. Abscisic acid-induced resistance against the brown spot pathogen Cochliobolus miyabeanus in rice involves MAP kinase-mediated repression of ethylene signaling.en
dcterms.extentpp. 2036-2052en
dcterms.issued2010-04-05
dcterms.languageen
dcterms.licenseCC-BY-4.0
dcterms.publisherOxford University Pressen
dcterms.subjectabscisic aciden
dcterms.subjectdisease resistanceen
dcterms.subjectethephonen
dcterms.subjectethyleneen
dcterms.subjectfungal diseasesen
dcterms.subjectgenesen
dcterms.subjectgenetic analysisen
dcterms.subjectinduced resistanceen
dcterms.subjectprotein kinaseen
dcterms.subjectreporter genesen
dcterms.subjectrna interferenceen
dcterms.subjectsignal transductionen
dcterms.subjecttranscriptionen
dcterms.subjectbrown spoten
dcterms.subjectcochliobolus miyabeanusen
dcterms.typeJournal Article

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