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dc.contributor.author Prats, Elena
dc.contributor.author Gay, Alan P.
dc.contributor.author Thomas, Barry J.
dc.contributor.author Mur, Luis A. J.
dc.contributor.author Carver, Timothy L. W.
dc.date.accessioned 2009-07-24T11:43:11Z
dc.date.available 2009-07-24T11:43:11Z
dc.date.issued 2006-06-22
dc.identifier.citation Prats , E , Gay , A P , Thomas , B J , Mur , L A J & Carver , T L W 2006 , ' Stomatal lock-open, a consequence of epidermal cell death, follows transient suppression of stomatal opening in barley attacked by Blumeria graminis ' Journal of Experimental Botany , pp. 2211-2226 . en
dc.identifier.issn 1460-2431
dc.identifier.other PURE: 113890
dc.identifier.other dspace: 2160/2740
dc.identifier.uri http://hdl.handle.net/2160/2740
dc.identifier.uri http://jxb.oxfordjournals.org/cgi/reprint/57/10/2211.pdf en
dc.description Prats, E., Gay, A. P., Mur, L. A. J., Thomas, B. J., Carver, T. L. W. (2006). Stomatal lock-open, a consequence of epidermal cell death, follows transient suppression of stomatal opening in barley attacked by Blumeria graminis. Journal of Experimental Botany, 57, (10), 2211-2226. Sponsorship: Marie Curie Individual Fellowship; Defra Project AR0712; ERDF Interreg. IIIB Atlantic Area Project 190 (PIMHAI). en
dc.description.abstract Blumeria graminis f.sp. hordei (Bgh) attack disrupted stomatal behaviour, and hence leaf water conductance (gl), in barley genotypes Pallas and Risø-S (susceptible), P01 (with Mla1 conditioning a hypersensitive response; HR), and P22 and Risø-R (with mlo5 conditioning papilla-based penetration resistance). Inoculation caused some stomatal closure well before the fungus attempted infection. Coinciding with epidermal cell penetration, stomatal opening in light was also impeded, although stomata of susceptible and mlo5 lines remained largely able to close in darkness. Following infection, in susceptible lines stomata closed in darkness but opening in light was persistently impeded. In Risø-R, stomata recovered nearly complete function by ~30 h after inoculation, i.e. after penetration resistance was accomplished. In P01, stomata became locked open and unable to close in darkness shortly after epidermal cells died due to HR. In the P22 background, mlo5 penetration resistance was often followed by consequential death of attacked cells, and here too stomata became locked open, but not until ~24 h after pathogen attack had ceased. The influence of epidermal cell death was localized, and only affected stomata within one or two cells distance. These stomata were unable to close not only in darkness but also after application of abscisic acid and in wilted leaves suffering drought. Thus, resistance to Bgh based on HR or associated with cell death may have previously unsuspected negative consequences for the physiological health of apparently ‘disease-free’ plants. The results are discussed in relation to the control of stomatal aperture in barley by epidermal cells. en
dc.format.extent 16 en
dc.language.iso eng
dc.relation.ispartof Journal of Experimental Botany en
dc.title Stomatal lock-open, a consequence of epidermal cell death, follows transient suppression of stomatal opening in barley attacked by Blumeria graminis en
dc.type Text en
dc.type.publicationtype Article (Journal) en
dc.contributor.institution Institute of Biological, Environmental and Rural Sciences en
dc.description.status Peer reviewed en


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