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dc.contributor.author Harren, Frans J. M.
dc.contributor.author Mur, Luis A. J.
dc.contributor.author Kenton, Paul
dc.contributor.author Smith, A.
dc.contributor.author Laarhoven, L.
dc.date.accessioned 2009-11-30T15:28:10Z
dc.date.available 2009-11-30T15:28:10Z
dc.date.issued 2007-04
dc.identifier.citation Harren , F J M , Mur , L A J , Kenton , P , Smith , A & Laarhoven , L 2007 , ' NO provides mainly avr-dependent inputs into cell death mechanisms associated with the hypersensitive response in tobacco ' Comparative Biochemistry and Physiology Part A: Molecular & Integrative Physiology , vol 146 , no. 4 , pp. S256 . , 10.1016/j.cbpa.2007.01.644 en
dc.identifier.issn 1095-6433
dc.identifier.other PURE: 140853
dc.identifier.other dspace: 2160/3743
dc.identifier.uri http://hdl.handle.net/2160/3743
dc.description Mur, L. A. J., Kenton, P., Harren, F., Laarhoven, L., Smith, A. (2007). NO provides mainly avr-dependent inputs into cell death mechanisms associated with the hypersensitive response in tobacco. Comparative Biochemistry and Physiology A - Molecular & Integrative Physiology, 146, (4), Supplement 1, S256. Abstracts of the Annual Main Meeting of the Society for Experimental Biology, Glasgow, Scotland, 31st March-4th April, 2007. en
dc.description.abstract The hypersensitive response (HR) is a localised programmed cell death that can aid in neutralising infections by pathogens. H2O2 and NO are proposed elicitors of the HR and we have employed in planta assays to measure the production of both (Mur et al., 2005 Plant Cell and Environment. 6: 65–78; Mur et al., 2005; Plant Physiology 138: 1247–1258) during a HR elicited in tobacco by Pseudomonas syringae pathovar phaseolicola (Psph). As in other studies, the simultaneous generation of NO and H2O2 was noted. H2O2 generation adopted a biphasic pattern reflecting two elicitation events; the first dependent on host recognition of pathogen-associated molecular patterns (PAMPs) and the second on cell death eliciting avirulence (avr) gene products also encoded by the pathogen. In contrast, NO generation was monophasic and, by 1 h following inoculation, continued at a constant level for at last 12 h. Inoculation of tobacco with a Psph hrp mutant where avr (but not PAMP) elicitation is abolished, resulted in the production of the first rise in H2O2 but negligible levels of NO. Reducing NO levels using inhibitors of nitric oxide generation affected only the avr-dependent H2O2 generation. Suppressing the oxidative burst had no observable effect on NO generation. These data suggest that NO provided primarily avr-dependent inputs into Psph-elicited HR. Evidence will also be presented that NO–ROS interactions influence cell death and certain defence gene expression via peroxynitrite and OH generation. en
dc.language.iso eng
dc.relation.ispartof Comparative Biochemistry and Physiology Part A: Molecular & Integrative Physiology en
dc.title NO provides mainly avr-dependent inputs into cell death mechanisms associated with the hypersensitive response in tobacco en
dc.type Text en
dc.type.publicationtype Article (Journal) en
dc.identifier.doi http://dx.doi.org/10.1016/j.cbpa.2007.01.644
dc.contributor.institution Institute of Biological, Environmental and Rural Sciences en
dc.description.status Peer reviewed en


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