A benzothiadiazole derivative induces systemic acquired resistance in tobacco
A benzothiadiazole derivative induces systemic acquired resistance in tobacco
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DOI：
10.1046/j.1365-313x.1996.10010061.x
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发表时间：
1996-07-01
期刊：
影响因子：
7.2
通讯作者：
Ryals, J
中科院分区：
文献类型：
--
作者：
Friedrich, L;Lawton, K;Ryals, J
系统获得性抗性（SAR）是植物中病原体诱导的抗病反应，其特征是广谱疾病控制和一组 SAR 基因的相关协调表达。苯并(1,2,3)-噻二唑-7-硫代碳酸S-甲酯(BTH)是一种新型合成化学品，能够诱导许多双子叶和单子叶植物物种的抗病性。在本报告中，描述了烟草植物对 BTH 处理的反应，并证明了它通过激活 SAR 来控制疾病的事实。 BTH 不会引起 SAR 信号转导途径中间体水杨酸 (SA) 的积累。由于 BTH 还在表达 nahG 基因的转基因植物中诱导抗病性和基因表达，因此它似乎激活了 SA 积累位点或下游的 SAR 信号转导途径。 BTH、SA 和 TMV 使用类似的顺式作用元件诱导 PR-1a 启动子，并且放线菌酮处理可阻断基因表达。因此，BTH 根据定义烟草中 SAR 的所有生理和生化标准诱导 SAR。
Systemic acquired resistance (SAR) is a pathogen-induced disease resistance response in plants that is characterized by broad spectrum disease control and an associated coordinate expression of a set of SAR genes. Benzo(1,2,3)-thiadiazole-7-carbothioic acid S-methyl ester (BTH) is a novel synthetic chemical capable of inducing disease resistance in a number of dicotyledenous and monocotyledenous plant species. In this report, the response of tobacco plants to BTH treatment is characterized and the fact that it controls disease by activating SAR is demonstrated. BTH does not cause an accumulation of salicylic acid (SA), an intermediate in the SAR signal transduction pathway. As BTH also induces disease resistance and gene expression in transgenic plants expressing the nahG gene, it appears to activate the SAR signal transduction pathway at the site of or downstream of SA accumulation. BTH, SA and TMV induce the PR-1a promoter using similar cis-acting elements and gene expression is blocked by cycloheximide treatment. Thus, BTH induces SAR based on all of the physiological and biochemical criteria that define SAR in tobacco.