Calmodulin-binding transcription activator (CAMTA) 3 mediates biotic defense responses in Arabidopsis

被引：184

作者：

Galon, Yael ^{[1
]}

Nave, Roy ^{[1
]}

Boyce, Joy M. ^{[2
]}

Nachmias, Dikla ^{[1
]}

Knight, Marc R. ^{[3
]}

Fromm, Hillel ^{[1
]}

机构：

[1] Tel Aviv Univ, Dept Plant Sci, Fac Life Sci, IL-69978 Tel Aviv, Israel

[2] Univ Oxford, Dept Plant Sci, Oxford OX1 3RB, England

[3] Univ Durham, Plant Stress Signalling Lab, Inst Plant & Microbial Sci, Sch Biol & Biomed Sci, Durham DH1 3LE, England

来源：

FEBS LETTERS | 2008年 / 582卷 / 06期

基金：

英国生物技术与生命科学研究理事会;

关键词：

calcium; calmodulin; pathogens; reactive oxygen species; signal transduction; transcriptome;

D O I：

10.1016/j.febslet.2008.02.037

中图分类号：

Q5 [生物化学]; Q7 [分子生物学];

学科分类号：

071010 ; 081704 ;

摘要：

Calmodulin-binding transcription activator (CAMTA) 3 (also called SR1) is a calmodulin-binding transcription factor in Arabidopsis. Two homozygous T-DNA insertion mutants (camta3-1, camta3-2) showed enhanced spontaneous lesions. Transcriptome analysis of both mutants revealed 6 genes with attenuated expression and 99 genes with elevated expression. Of the latter, 32 genes are related to defense against pathogens (e.g. WRKY33, PR1 and chitinase). Propagation of a virulent strain of the bacterial pathogen Pseudomonas syringae and the fungal pathogen Botrytis cinerea were attenuated in both mutants. Moreover, both mutants accumulated high levels of H(2)O(2). We suggest that CAMTA3 regulates the expression of a set of genes involved in biotic defense responses. (C) 2008 Federation of European Biochemical Societies. Published by Elsevier B.V. All rights reserved.

引用

页码：943 / 948

页数：6

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