有哪些信誉好的足球投注网站a permeable cuticle is associated with the release of reactive oxygen species and induction of innate immunity一个渗透角质层与活性氧的释放和先天免疫的感应.pdfVIP
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a permeable cuticle is associated with the release of reactive oxygen species and induction of innate immunity一个渗透角质层与活性氧的释放和先天免疫的感应
A Permeable Cuticle Is Associated with the Release of
Reactive Oxygen Species and Induction of Innate
Immunity
´ ¤a
Floriane L’Haridon, Angelique Besson-Bard , Matteo Binda, Mario Serrano, Eliane Abou-Mansour,
¤b ¤c ´ ´ ¤c ¤a
Francine Balet, Henk-Jan Schoonbeek , Stephane Hess, Ricardo Mir , Jose Leon , Olivier Lamotte ,
´
Jean-Pierre Metraux*
Department of Biology, University of Fribourg, Fribourg, Switzerland
Abstract
Wounded leaves of Arabidopsis thaliana show transient immunity to Botrytis cinerea, the causal agent of grey mould. Using a
fluorescent probe, histological staining and a luminol assay, we now show that reactive oxygen species (ROS), including
H2O2 and O22, are produced within minutes after wounding. ROS are formed in the absence of the enzymes Atrboh D and F
and can be prevented by diphenylene iodonium (DPI) or catalase. H2O2 was shown to protect plants upon exogenous
application. ROS accumulation and resistance to B. cinerea were abolished when wounded leaves were incubated under dry
conditions, an effect that was found to depend on abscisic acid (ABA). Accordingly, ABA biosynthesis mutants (aba2 and
aba3) were still fully resistant under dry conditions even without wounding. Under dry conditions, wounded plants
contained higher ABA levels and displayed enhanced expression of ABA-dependent and ABA-reporter genes. Mutants
impaired in cutin synthesis such as bdg and lacs2.3 are already known to display a high level of resistance to B. cinerea and
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