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Role of ethylene signaling in the production of rice volatiles induced by the rice brown planthopper Nilaparvata lugens

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Science Bulletin 2006年第20期51卷 2457-2465页

作者： lu yujie1,{1.,{2., zhejiang university, hangzhou 31002., china 2. College of Food and Oil, Henan university of Technology, Zhengzhou 450052. china institute of {1. {2. Zhejiang University Hangzhou China College of Food and Oil Henan University of Technology Zhengzhou China

Ethylene signaling pathway plays an important role in induced plant direct defense against herbivores and pathogens; however, up to now, only few researches have focused on its role in induced plant indirect defense, i.e. the release of herbi- vore-induced volatiles, and the results are variable. Using a model system consisting of rice plants, the rice brown planthopper Nilaparvata lugens and its egg parasitoid Anagrus nilaparvatae, we examined the role of ethylene signaling in the production of rice volatiles induced by N. lugens by measuring both the timing of herbivore-induced ethylene levels and the relationships between ethylene, rice volatiles and attraction of the parasitoid. N. lugens infestation sig- nificantly enhanced the release of ethylene during 2.2. h after infestation. Plants treated with eth- ephon, a compound that breaks down to release ethylene at cytoplasmic pH, released volatiles profiles similar to those released by N. lugens-infested plants, and both of them showed an equal attraction of the parasitoid. Moreover, pretreatment with 1.MCP, an inhibitor of ethylene perception, reduced the release of most of rice volatiles whose amount was enhanced by N. lugens infestation and decreased the attrac- tiveness to the parasitoid. These results demonstrate that ethylene signaling is required for the production of rice volatiles induced by N. lugens.

关键词： ethylene signaling pathway Nilaparvata lugens Anagrus nilaparvatae herbivore-induced rice volatiles rice tritrophic inter- action.

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