Dual function of Arabidopsis ATAF1 in abiotic and biotic stress responses
Dual function of Arabidopsis ATAF1 in abiotic and biotic stress responses
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拟南芥 ATAF1 在非生物和生物胁迫反应中的双重功能
DOI：
10.1038/cr.2009.108
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发表时间：
2009-09
期刊：
影响因子：
44.1
通讯作者：
Yin, Bojiao
中科院分区：
文献类型：
--
作者：
Deng, Zhiyong;Yang, Cuiping;Wu, Yaorong;Li, Yin;Lai, Jianbin;Zhang, Ling;Yang, Chengwei;Xie, Qi;Zhao, Qingzhen;Zhang, Yiyue;Yin, Bojiao
NAC家族基因编码参与多种生物过程的植物特异性转录因子。在这项研究中，拟南芥NAC基因ATAF 1被发现诱导干旱，高盐，脱落酸（阿坝），茉莉酸甲酯，机械伤害，和灰葡萄孢感染。在ABA缺陷突变体aba 2中发现了ATAF 1在干旱或高盐胁迫下的显著诱导，揭示了不依赖ABA的表达机制。拟南芥ATAF 1-过表达株系表现出许多改变的表型，包括矮化和短主根。此外，体内实验表明，ATAF 1是一个真正的调节器调节植物对许多非生物胁迫和坏死性病原体感染的反应。拟南芥中ATAF 1的过表达增加了植物对阿坝、盐和氧化胁迫的敏感性。特别是，ATAF 1过表达的植物，而不是突变株系，表现出显着增强植物耐旱性。此外，ATAF 1过表达增强了植物对坏死营养型病原体B的易感性。灰霉病，但没有改变由无毒或毒力菌株的P. lingae pv番茄DC 3000引起的疾病症状。过表达ATAF 1的转基因植物对氧化胁迫高度敏感，这表明活性氧中间产物可能与ATAF 1介导的信号转导有关，以响应病原体和非生物胁迫。
NAC family genes encode plant-specific transcription factors involved in diverse biological processes. In this study, the Arabidopsis NAC gene ATAF1 was found to be induced by drought, high-salinity, abscisic acid (ABA), methyl jasmonate, mechanical wounding, and Botrytis cinerea infection. Significant induction of ATAF1 was found in an ABA-deficient mutant aba2 subjected to drought or high salinity, revealing an ABA-independent mechanism of expression. Arabidopsis ATAF1-overexpression lines displayed many altered phenotypes, including dwarfism and short primary roots. Furthermore, in vivo experiments indicate that ATAF1 is a bona fide regulator modulating plant responses to many abiotic stresses and necrotrophic-pathogen infection. Overexpression of ATAF1 in Arabidopsis increased plant sensitivity to ABA, salt, and oxidative stresses. Especially, ATAF1 overexpression plants, but not mutant lines, showed remarkably enhanced plant tolerance to drought. Additionally, ATAF1 overexpression enhanced plant susceptibility to the necrotrophic pathogen B. cinerea, but did not alter disease symptoms caused by avirulent or virulent strains of P. syringae pv tomato DC3000. Transgenic plants overexpressing ATAF1 were hypersensitive to oxidative stress, suggesting that reactive oxygen intermediates may be related to ATAF1-mediated signaling in response to both pathogen and abiotic stresses.
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影响因子：
5.1
作者：
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通讯作者：
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作者：
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发表时间：
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影响因子：
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