寄主监控昆虫唾液蛋白平衡植物抗性与生长发育  

The Host Controls the Protein Level of Insect Effectors to Balance Immunity and Growth

作　　者：刘裕强[1] 万建民[1,2] Yuqiang Liu;Jianmin Wan(State Key Laboratory of Crop Genetics&Germplasm Enhancement and Utilization,Nanjing Agricultural University,Nanjing 210095,China;Institute of Crop Sciences,Chinese Academy of Agricultural Sciences,Beijing 100081,China)

机构地区：[1]南京农业大学,作物遗传与种质创新利用全国重点实验室,南京210095 [2]中国农业科学院作物科学研究所,北京100081

出　　处：《植物学报》2023年第3期353-355,共3页Chinese Bulletin of Botany

基　　金：国家自然科学基金(No.32088102)。

摘　　要：作物生产常遭受各类虫害威胁。揭示昆虫与寄主之间的互作机制,对害虫的绿色防治具有重要意义。武汉大学何光存团队鉴定了褐飞虱(BPH)唾液蛋白BISP。在易感品种中, BISP靶向OsRLCK185并抑制其介导的基础防御。在携带褐飞虱抗性基因Bph14的水稻(Oryza sativa)品种中,BPH14直接结合BISP并激活寄主的免疫反应,但会抑制水稻的生长。BISP-BPH14与自噬装载受体OsNBR1结合,通过自噬途径降解BISP,下调水稻对BPH的抗性,恢复植株正常生长。该研究鉴定到首个被植物免疫受体感知的昆虫唾液蛋白,揭示了寄主通过感知并调节昆虫效应蛋白水平来平衡水稻抗性与生长发育的分子机制,为培育高产水稻抗虫品种提供了新思路。Crop production is constantly threatened by various insect pests,revealing the mechanism underlying insect and host interaction is essential for environmentally-friendly pest management.Guangcun He and colleagues from Wuhan University identified and characterized a saliva protein BISP of the brown planthopper(BPH).In susceptible varieties,BISP targets OsRLCK185 and inhibits the basic defense.In varieties carrying the brown planthopper resistance gene Bph14,BPH14 directly binds to BISP and activates the host immune response but inhibits rice growth.BISP-BPH14 binds to the autophagic cargo receptor OsNBR1 and results in the degradation of BISP through the autophagic pathway,downregulating rice resistance against BPH and restoring the plant growth.This study illustrated the first insect salivary protein perceived by plant immune receptor,and revealed the molecular mechanism underlying the balance of immunity and growth in host by perceiving and regulating the protein level of insect effectors,which provides new ideas for developing high-yield insect resistant rice varieties.

关 键 词：水稻 褐飞虱 抗虫基因 唾液蛋白 自噬 

分 类 号：S435.112.3[农业科学—农业昆虫与害虫防治]