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

Piffanelli, P., Zhou, F. S., Casais, C., Orme, J., Jarosch, B., Schaffrath, U., et al. (2002). The barley MLO modulator of defense and cell death is responsive to biotic and abiotic stress stimuli. Plant Physiology, 129(3), 1076-1085.

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Item Permalink: http://hdl.handle.net/11858/00-001M-0000-0012-3DBF-D Version Permalink: http://hdl.handle.net/11858/00-001M-0000-0012-3DC0-7
Genre: Journal Article

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 Creators:
Piffanelli, P., Author
Zhou, F. S., Author
Casais, C., Author
Orme, J., Author
Jarosch, B., Author
Schaffrath, U., Author
Collins, N. C., Author
Panstruga, R.1, Author              
Schulze-Lefert, P.1, Author              
Affiliations:
1Dept. of Plant Microbe Interactions (Paul Schulze-Lefert), MPI for Plant Breeding Research, Max Planck Society, ou_1113572              

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 Abstract: Lack 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.

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Language(s): eng - English
 Dates: 2002-07
 Publication Status: Published in print
 Pages: -
 Publishing info: -
 Table of Contents: -
 Rev. Method: Peer
 Identifiers: eDoc: 28795
ISI: 000177045000016
 Degree: -

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Title: Plant Physiology
  Alternative Title : Plant Physiol.
Source Genre: Journal
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Publ. Info: -
Pages: - Volume / Issue: 129 (3) Sequence Number: - Start / End Page: 1076 - 1085 Identifier: ISSN: 0032-0889