Coronatine and salicylic acid:: the battle between Arabidopsis and Pseudomonas for phytohormone control
Coronatine and salicylic acid:: the battle between Arabidopsis and Pseudomonas for phytohormone control
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DOI：
10.1111/j.1364-3703.2004.00265.x
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发表时间：
2005-01-01
影响因子：
4.9
通讯作者：
Klee, HJ
中科院分区：
文献类型：
--
作者：
Block, A;Schmelz, E;Klee, HJ
植物毒素冠菌素是由假单胞菌pv.番茄（Pst.）冠菌素在拟南芥中作为一种毒力因子，对冠菌素不敏感的突变体对Pst具有抗性，并具有较高的水杨酸（SA）水平。在这项工作中，我们使用SA缺陷株系NahG和G122来确定冠菌素是否直接作为毒力因子或通过SA抑制间接起作用。使用冠菌素缺陷型Pst突变体，我们证明了缺乏冠菌素妥协Pst在野生型和SA缺陷型拟南芥的毒力。因此，冠菌素的作用不是由于SA抑制。相反，SA-独立的茉莉酸响应是其作用的最可能机制。
The phytotoxin coronatine is a jasmonate mimic produced by Pseudomonas syringae pv. tomato (Pst). Coronatine acts as a virulence factor in Arabidopsis and mutants insensitive to coronatine are resistant to Pst and have higher levels of salicylic acid (SA). In this work we used the SA-deficient lines NahG and sid22 to determine if coronatine acts directly as a virulence factor or indirectly by SA suppression. Using coronatine-deficient Pstmutants we demonstrated that the lack of coronatine compromises Pst virulence in both wild-type and SA-deficient Arabidopsis. Thus, the action of coronatine is not due to SA suppression. Rather, SA-independent jasmonate-responses are the most likely mechanism for its action.