Linked Life Data

12366796

Source:http://linkedlifedata.com/resource/pubmed/id/12366796

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
1
pubmed:dateCreated
2002-10-7
pubmed:databankReference
pubmed:abstractText
Lipid peroxidation, often associated with hypersensitive cell death, may be initiated either by active oxygen species (AOS) or lipoxygenases (LOX). Here we report a detailed analysis of this oxidative process in both incompatible and compatible interactions between the cotton cultivar Reba B50 and Xanthomonas campestris pv. malvacearum (Xcm). The hypersensitive reaction (HR) was characterized by a massive production of polyunsaturated fatty acid (PUFA) hydroperoxides together with typical tissue dehydration. Among these, isomers peroxidized on carbon 9, largely predominant, were chiral, showing an excess in the S enantiomer. The HR process was accompanied by an increase in 9S-LOX activity and preceded by transcription of a LOX gene (GhKLox1). These results showed that: (i) AOS produced during the oxidative burst were not involved in PUFA peroxidation during HR; and (ii) as previously described in elicited leaves of tobacco, the massive enzymatic lipid peroxidation was closely associated with hypersensitive cell death. During disease development in this cotton cultivar, the 9-lipoxygenation of PUFAs was late, weak, preceded by a faint accumulation of GhKLox1 transcripts, and associated with chlorosis but not with necrosis. Consequently, the main difference between incompatible and compatible interactions was in the precocity and intensity of the oxidative process, rather than in its nature. These data provide the evidence for a correlation between lipid peroxidation and hypersensitive cell death induced by pathogens.
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:month
Oct
pubmed:issn
0960-7412
pubmed:author
pubmed:issnType
Print
pubmed:volume
32
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
1-12
pubmed:dateRevised
2008-11-21
pubmed:meshHeading
pubmed-meshheading:12366796-Apoptosis, pubmed-meshheading:12366796-Cotyledon, pubmed-meshheading:12366796-Fatty Acids, Unsaturated, pubmed-meshheading:12366796-Gene Expression Regulation, Enzymologic, pubmed-meshheading:12366796-Gene Expression Regulation, Plant, pubmed-meshheading:12366796-Gossypium, pubmed-meshheading:12366796-Immunity, Innate, pubmed-meshheading:12366796-Lipid Peroxidation, pubmed-meshheading:12366796-Lipoxygenase, pubmed-meshheading:12366796-Molecular Sequence Data, pubmed-meshheading:12366796-Oxidative Stress, pubmed-meshheading:12366796-Plant Diseases, pubmed-meshheading:12366796-Plant Proteins, pubmed-meshheading:12366796-Reactive Oxygen Species, pubmed-meshheading:12366796-Signal Transduction, pubmed-meshheading:12366796-Water, pubmed-meshheading:12366796-Xanthomonas
pubmed:year
2002
pubmed:articleTitle
Lipid peroxidation in cotton: Xanthomonas interactions and the role of lipoxygenases during the hypersensitive reaction.
pubmed:affiliation
IRD-UMR DGPC (Diversité et Génome des Plantes Cultivées; AGRO-M, CIRAD, INRA, IRD), BP 5045, 34032 Montpellier, France.
pubmed:publicationType
Journal Article, Research Support, Non-U.S. Gov't