Herbivore-induced volatiles influence moth preference by increasing the beta-Ocimene emission of neighbouring tea plants

文献类型： 外文期刊

第一作者： Jing, Tingting

作者： Jing, Tingting;Du, Wenkai;Gao, Ting;Li, Dongfeng;Guo, Danyang;He, Fan;Yu, Guomeng;Li, Shupeng;Schwab, Wilfried;Wan, Xiaochun;Song, Chuankui;Qian, Xiaona;Sun, Xiaoling;Schwab, Wilfried

作者机构：

关键词： calcium (Ca2+); HIPVs; JA; mated moth; MPK signalling; tea plant

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： 2021 年 44 卷 11 期

页码：

收录情况： SCI

摘要： Herbivore-induced plant volatiles prime neighbouring plants to respond more strongly to subsequent attacks. However, the key volatiles that trigger this state and their priming mechanisms remain largely unknown. The tea geometrid Ectropis obliqua is one of the most devastating leaf-feeding pests of tea plants. Here, plant-plant communication experiments demonstrated that volatiles emitted from tea plants infested by E. obliqua larvae triggered neighbouring plants to release volatiles that repel E. obliqua adult, especially mated females. Volatile analyses revealed that the quantity of eight volatiles increased dramatically when plants were exposed to volatiles emitted by infested tea plants, including (Z)-3-hexenol, linalool, alpha-farnesene, beta-Ocimene and (E)-4,8-dimethyl-1,3,7-nonatriene (DMNT). The results of behavioural bioassays demonstrated that beta-Ocimene strongly repelled mated E. obliqua females. Individual volatile compound exposure experiments revealed that (Z)-3-hexenol, linalool, alpha-farnesene and DMNT triggered the emission of beta-Ocimene from tea plants. Chemical inhibition experiments demonstrated that the emission of beta-Ocimene induced by (Z)-3-hexenol, linalool, alpha-farnesene and DMNT were dependent on Ca2+ and JA signalling. These findings help us to understand how E. obliqua moths respond to volatiles emitted from tea plants and provide new insight into volatile-mediated plant-plant interactions. They have potential significance for the development of novel insect and pest control strategies in crops.

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