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

作　　者：LU Yujie WANG Xia LOU Yonggen CHENG Jiaan 

机构地区：[1]Institute of Insect Sciences, Zhejiang University, Hangzhou 310029, China [2]College of Food and Oil, Henan University of Technology, Zhengzhou 450052, China

出　　处：《Chinese Science Bulletin》2006年第20期2457-2465,共9页

基　　金：the Ministry of Science and Technology of China （973） （Grant No. G2000016208）; National Natural Science Foundation of China （Grant No. 30270233）; Program for New Century Excellent Talents in University （Grant No. NCET-04-0534） ; Program for Changjiang Scholars and Innovative Research Team in University （Grant No. IRT0355）; China Postdoctoral Science Foundation.

摘　　要：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―24 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.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 herbivore-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 significantly enhanced the release of ethylene during 2-24 h after infestation. Plants treated with ethephon, 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 attractiveness to the parasitoid. These results demonstrate that ethylene signaling is required for the production of rice volatiles induced by N. lugens.

关 键 词：乙烯 信号传导 水稻 挥发物 草食动物 病原体 

分 类 号：S852.3[农业科学—基础兽医学]