Systemin regulates both systemic and volatile signaling in tomato plants
Systemin regulates both systemic and volatile signaling in tomato plants
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DOI：
10.1007/s10886-007-9254-9
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发表时间：
2007-04-01
影响因子：
2.3
通讯作者：
Rao, R.
中科院分区：
文献类型：
--
作者：
Corrado, G.;Sasso, R.;Rao, R.
植物对害虫攻击的主要反应是激活各种防御机制。在番茄中，几项研究表明，一种18个氨基酸（aa）的肽，称为系统素，是系统诱导对植物咀嚼害虫的直接抗性的主要信号，并且前系统素基因（编码200个氨基酸的系统素前体）的转基因表达激活了参与植物对食草动物反应的基因。通过使用行为，化学和基因表达分析的组合，我们报告说，系统素提高生产的生物活性挥发性化合物，增加植物对寄生蜂的吸引力，并激活参与挥发性生产的基因。我们的数据表明，系统素参与番茄间接防御的系统激活，我们的结论是，一个单一的基因控制系统激活的协调和相关的反应对害虫。
The prevailing reaction of plants to pest attack is the activation of various defense mechanisms. In tomato, several studies indicate that an 18 amino acid (aa) peptide, called systemin, is a primary signal for the systemic induction of direct resistance against plant-chewing pests, and that the transgenic expression of the prosystemin gene (encoding the 200 aa systemin precursor) activates genes involved in the plant response to herbivores. By using a combination of behavioral, chemical, and gene expression analyses, we report that systemin enhances the production of bioactive volatile compounds, increases plant attractivity towards parasitiod wasps, and activates genes involved in volatile production. Our data imply that systemin is involved in the systemic activation of indirect defense in tomato, and we conclude that a single gene controls the systemic activation of coordinated and associated responses against pests.