The barley MLO modulator of defense and cell death Is responsive to biotic and abiotic stress stimuli

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dc.contributor.authorPiffanelli, P.
dc.contributor.authorZhou, F.
dc.contributor.authorCasais, C.
dc.contributor.authorOrme, J.
dc.contributor.authorJarosch, B.
dc.contributor.authorSchaffrath, U.
dc.contributor.authorCollins, N.
dc.contributor.authorPanstruga, R.
dc.contributor.authorSchulze-Lefert, P.
dc.date.issued2002
dc.description.abstractLack of the barley (Hordeum vulgare) seven-transmembrane domain MLO protein confers resistance against the fungal pathogen Blumeria graminis f. sp. hordei (Bgh). To broaden the basis for MLO structure/function studies, we sequenced additional mlo resistance alleles, two of which confer only partial resistance. Wild-type MLO dampens the cell wall-restricted hydrogen peroxide burst at points of attempted fungal penetration of the epidermal cell wall, and in subtending mesophyll cells, it suppresses a second oxidative burst and cell death. Although the Bgh-induced cell death in mlo plants is spatially and temporally separated from resistance, we show that the two processes are linked. Uninoculated mutant mlo plants exhibit spontaneous mesophyll cell death that appears to be part of accelerated leaf senescence. Mlo transcript abundance increases in response to Bgh, rice (Oryza sativa) blast, wounding, paraquat treatment, a wheat powdery mildew-derived carbohydrate elicitor, and during leaf senescence. This suggests a broad involvement of Mlo in cell death protection and in responses to biotic and abiotic stresses.
dc.description.statementofresponsibilityPietro Piffanelli, Fasong Zhou, Catarina Casais, James Orme, Birgit Jarosch, Ulrich Schaffrath, Nicholas C. Collins, Ralph Panstruga, and Paul Schulze-Lefert
dc.identifier.citationPlant Physiology, 2002; 129(3):1076-1085
dc.identifier.doi10.1104/pp.010954
dc.identifier.issn0032-0889
dc.identifier.issn1532-2548
dc.identifier.orcidCollins, N. [0000-0002-5447-6755]
dc.identifier.urihttp://hdl.handle.net/2440/34196
dc.language.isoen
dc.publisherAmer Soc Plant Physiologists
dc.source.urihttps://doi.org/10.1104/pp.010954
dc.subjectCell Wall
dc.subjectFungi
dc.subjectHordeum
dc.subjectPlant Leaves
dc.subjectHydrogen Peroxide
dc.subjectParaquat
dc.subjectPlant Proteins
dc.subjectApoptosis
dc.subjectPlant Diseases
dc.subjectGene Expression Regulation, Developmental
dc.subjectGene Expression Regulation, Plant
dc.subjectRNA Splicing
dc.subjectMutation
dc.subjectAlleles
dc.subjectStress, Mechanical
dc.subjectImmunity, Innate
dc.titleThe barley MLO modulator of defense and cell death Is responsive to biotic and abiotic stress stimuli
dc.typeJournal article
pubs.publication-statusPublished

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