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Suppression of a leucine‐rich repeat receptor‐like kinase enhances host plant resistance to a specialist herbivore
Author(s) -
Ye Meng,
Kuai Peng,
Hu Lingfei,
Ye Miaofen,
Sun Hao,
Erb Matthias,
Lou Yonggen
Publication year - 2020
Publication title -
plant, cell and environment
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.646
H-Index - 200
eISSN - 1365-3040
pISSN - 0140-7791
DOI - 10.1111/pce.13834
Subject(s) - brown planthopper , jasmonic acid , salicylic acid , wrky protein domain , oryza sativa , gene silencing , biology , leucine rich repeat , protein kinase a , herbivore , microbiology and biotechnology , kinase , botany , biochemistry , gene , gene expression , transcriptome
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.