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dc.contributor.author Atzorn, Rainer
dc.contributor.author Mur, Luis A. J.
dc.contributor.author Wasternack, Claus
dc.contributor.author Kenton, Paul
dc.contributor.author Miersch, Otto
dc.date.accessioned 2008-12-04T14:46:34Z
dc.date.available 2008-12-04T14:46:34Z
dc.date.issued 2005-12-23
dc.identifier.citation Atzorn , R , Mur , L A J , Wasternack , C , Kenton , P & Miersch , O 2005 , ' The outcomes of concentration-specific interactions between salicylate and jasmonate signaling include synergy, antagonism, and oxidative stress leading to cell death ' Plant Physiology , vol 140 , no. 1 , pp. 249-262 . , 10.1104/pp.105.072348 en
dc.identifier.issn 0032-0889
dc.identifier.other PURE: 94108
dc.identifier.other dspace: 2160/1351
dc.identifier.uri http://hdl.handle.net/2160/1351
dc.identifier.uri http://www.plantphysiol.org/cgi/content/abstract/140/1/249 en
dc.description Mur L.A.J., Kenton, P., Atzorn R., Miersch O. & Wasternack, C. (2006) The outcomes of concentration-specific interactions between salicylate and jasmonate signalling include synergy, antagonism, and oxidative stress leading to cell death. Plant Physiology, 140, 249-262. Sponsorship: DEFRA RAE2008 en
dc.description.abstract Salicylic acid (SA) has been proposed to antagonize jasmonic acid (JA) biosynthesis and signaling. We report, however, that in salicylate hydroxylase-expressing tobacco (Nicotiana tabacum) plants, where SA levels were reduced, JA levels were not elevated during a hypersensitive response elicited by Pseudomonas syringae pv phaseolicola. The effects of cotreatment with various concentrations of SA and JA were assessed in tobacco and Arabidopsis (Arabidopsis thaliana). These suggested that there was a transient synergistic enhancement in the expression of genes associated with either JA (PDF1.2 [defensin] and Thi1.2 [thionin]) or SA (PR1 [PR1a--glucuronidase in tobacco]) signaling when both signals were applied at low (typically 10–100 µM) concentrations. Antagonism was observed at more prolonged treatment times or at higher concentrations. Similar results were also observed when adding the JA precursor, -linolenic acid with SA. Synergic effects on gene expression and plant stress were NPR1- and COI1-dependent, SA- and JA-signaling components, respectively. Electrolyte leakage and Evans blue staining indicated that application of higher concentrations of SA + JA induced plant stress or death and elicited the generation of apoplastic reactive oxygen species. This was indicated by enhancement of hydrogen peroxide-responsive AoPR10--glucuronidase expression, suppression of plant stress/death using catalase, and direct hydrogen peroxide measurements. Our data suggests that the outcomes of JA-SA interactions could be tailored to pathogen/pest attack by the relative concentration of each hormone. en
dc.format.extent 14 en
dc.language.iso eng
dc.relation.ispartof Plant Physiology en
dc.title The outcomes of concentration-specific interactions between salicylate and jasmonate signaling include synergy, antagonism, and oxidative stress leading to cell death en
dc.type Text en
dc.type.publicationtype Article (Journal) en
dc.identifier.doi http://dx.doi.org/10.1104/pp.105.072348
dc.contributor.institution Institute of Biological, Environmental and Rural Sciences en
dc.description.status Peer reviewed en


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