植物对虫害的系统获得性抗性及抗虫与抗病信号途径间的相互作用

Plant systemic acquired resistance to insect and a cross-talk between pathogen and insect resistance signal molecules

受病原体感染后,植物会获得一种持久广泛的抗性,称为系统获得性抗性,受到昆虫侵害时也会获得类似的系统获得性抗性。植物系统抗虫与抗病信号分子不同,前者是茉莉酸(JA)、甲基茉莉酸(Me-JA)或系统素,而后者是水杨酸(SA)。SA 介导的系统抗病信号途径与 JA 等介导的系统抗虫信号途径并非完全独立,而是存在所谓的“交叉对话”,但“交叉对话”结果是相互促进还是抑制仍不清楚。植物系统抗性信号及其互作研究无疑会完善植物保护策略。

After pathogen infection, plant will acquire a long lasting broad-spectrum resistance, known as systemic acquired resistance （SAR）. Plant can also acquire a similar SAR after insect attack. The signal molecules of these two kinds of SAR are different： Of pathogen, it is salicylic acid （SA） ;And of insect, it is jasmonic acid （JA）, methyl-jasmonic acid （Me-JA） or systemin. SAR signal transduction pathways mediated by JA, Me-JA or systermin is not thoroughly independent of by SA, but has a cross-talk between them, and whether the influence of their cross-talk on each other is promotion or reduction is still unknown. But it is undoubted that research on this subject will contribute to the foundation of plant protection strategies.