Herbivore-induced rice resistance against rice blast mediated by salicylic acid  

作　　者：Kai-Li Zhang Qing-Song Liu Hou-Xiang Kang Xiao-Mei Liu Xiu-Ping Chen Yu-Fa Peng Yun-He Li 

机构地区：[1]College of Environment and Plant Protection,Hainan University,Haikou,China [2]State Key Laboratory for Biology of Plant Diseases and Insect Pests,Institute of Plant Protection,Chinese Academy of Agricultural Sciences,Beijing,China [3]College of Life Sciences,Xinyang Normal University,Xinyang,Henan,China

出　　处：《Insect Science》2020年第1期49-57,共9页昆虫科学（英文版）

基　　金：supported by the National GMO New Variety Breeding Program of the People’s Republic of China(2016ZX08011-001);the Ph.D.Early Development Program,and Nanhu Scholars Program for Young Scholars of Xinyang Normal University.

摘　　要：In agro-ecosystems,plants are important mediators of interactions between their associated herbivorous insects and microbes,and any change in plants induced by one species may lead to cascading effects on interactions with other species.Often,such effects are regulated by phytohormones such as jasmonic acid(JA)and salicylic acid(SA).Here,we investigated the tripartite interactions among rice plants,three insect herbivores(Chilo suppressalis,Cnaphalocrocis medinalis or Nilapai-vata lugens),and the causal agent of rice blast disease,the fungus Magnaporthe oryzae.We found that pre-infestation of rice by C.suppressalis or N.lugens but not by C.medinalis conferred resistance to M.oryzae.For C.suppressalis and N.lugens,insect infestation without fungal inoculation induced the accumulation of both JA and SA in rice leaves.In contrast,infestation by C.medinalis increased JA levels but reduced SA levels.The exogenous application of SA but not of JA conferred resistance against M.oryzae.These results suggest that preinfestation by C suppressalis or N.lugens conferred resistance against M.oryzae by increasing SA accumulation.These findings enhance our understanding of the interactions among rice plant,insects and pathogens,and provide valuable information for developing an ecologically sound strategy for controlling rice blast.

关 键 词：induced defense jasmonic acid plant-insect-pathogen interaction RICE salicylic acid 

分 类 号：S435.111.41[农业科学—农业昆虫与害虫防治]