褐飞虱
茉莉酸
水杨酸
WRKY蛋白质结构域
富含亮氨酸重复
食草动物
水稻
基因沉默
蛋白激酶A
生物
植物
激酶
细胞生物学
生物化学
基因
基因表达
转录组
作者
Meng Ye,Peng Kuai,Lingfei Hu,Miaofen Ye,Honglei Sun,Matthias Erb,Yonggen Lou
摘要
Abstract The mechanisms by which herbivores induce plant defenses are well studied. However, how specialized herbivores suppress plant resistance is still poorly understood. Here, we discovered a rice ( Oryza sativa ) leucine‐rich repeat receptor‐like kinase, OsLRR‐RLK2 , which is induced upon attack by gravid females of a specialist piercing‐sucking herbivore, the brown planthopper (BPH, Nilaparvata lugens ). Silencing OsLRR‐RLK2 decreases the constitutive activity of mitogen‐activated protein kinase (OsMPK6) and alters BPH‐induced transcript levels of several defense‐related WRKY transcription factors. Moreover, silencing OsLRR‐RLK2 reduces BPH‐induction of jasmonic acid and ethylene but promotes the biosynthesis of both elicited salicylic acid and H 2 O 2 ; silencing also enhances the production of volatiles emitted from rice plants infested with gravid BPH females. These changes decrease BPH preference and performance in the glasshouse and the field. These findings suggest that OsLRR‐RLK2, by regulating the plant's defense‐related signaling profile, increases the susceptibility of rice to BPH, and that BPH infestation influences the expression of OsLRR‐RLK2, suppressing the resistance of rice to BPH.
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