文献类型： 外文期刊
作者： Ye, Meng 1 ; Liu, Miaomiao 1 ; Erb, Matthias 2 ; Glauser, Gaetan 3 ; Zhang, Jin 1 ; Li, Xiwang 1 ; Sun, Xiaoling 1 ;
作者机构： 1.Chinese Acad Agr Sci, Key Lab Tea Biol & Resources Utilizat, Minist Agr & Rural Affairs, Natl Ctr Tea Plant Improvement,Tea Res Inst, Hangzhou, Peoples R China
2.Univ Bern, Inst Plant Sci, Bern, Switzerland
3.Univ Neuchatel, Neuchatel Platform Analyt Chem, Neuchatel, Switzerland
关键词： calcium signalling; defence metabolite; defence priming; herbivore‐ induced plant volatile; jasmonate signalling; phytohormone; tea geometrid
期刊名称：PLANT CELL AND ENVIRONMENT （ 影响因子：7.228； 五年影响因子：7.791 ）
ISSN： 0140-7791
年卷期：
页码：
收录情况： SCI
摘要： Upon herbivore attack, plants emit herbivore-induced plant volatiles (HIPVs). HIPVs can prime defences and resistance of intact plants. However, how HIPVs are decoded and translated into functional defence responses is not well understood, especially in long-lived woody plants. Here, we investigated the impact of the aromatic HIPV indole on defence-related early signalling, phytohormone accumulation, secondary metabolite biosynthesis and herbivore resistance in tea plants. We find that tea plants infested with tea geometrid caterpillars release indole at concentrations >450 ng*hr(-1). Exposure to corresponding doses of synthetic indole primes the expression of early defence genes involved in calcium (Ca2+) signalling, MPK signalling and jasmonate biosynthesis. Indole exposure also primes the production of jasmonates and defence-related secondary metabolites. These changes are associated with higher herbivore resistance of indole-exposed tea plants. Chemical inhibition of Ca2+ and jasmonate signalling provides evidence that both are required for indole-mediated defence priming and herbivore resistance. Our systematic assessment of the impact of indole on defence signalling and deployment shows that indole acts by boosting Ca2+ signalling, resulting in enhanced jasmonate-dependent defence and resistance in a woody plant. Our work extends the molecular basis of HIPV-induced defence priming from annual plants to an economically important tree species.
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