Knocking Out OsRLK7-1 Impairs Rice Growth and Development but Enhances Its Resistance to Planthoppers

Leucine-rich repeat receptor-like kinases (LRR-RLKs) are an important subfamily of (RLKs) in plants that play key roles sensing different biotic and abiotic stress. However, the role LRR-RLKs herbivore-induced plant defense remains largely elusive. Here, we found expression a rice gene, OsRLK7-1, was induced by mechanical wounding, but slightly suppressed infestation gravid females brown planthopper (BPH, Nilaparvata lugens) or white-backed (WBPH, Sogatella furcifera). Through targeted disruption OsRLK7-1 (resulting ko-rlk lines), observed augmentation transcript levels BPH-induced OsMPK3, OsWRKY30, OsWRKY33, OsWRKY45, alongside heightened planthopper-induced jasmonic acid, JA-isoleucine, abscisic acid tissues. These dynamic changes further facilitated biosynthesis multiple phenolamides within plants, culminating enhanced resistance to infestations under both lab field conditions. In addition, knocking out impaired growth reproduction. results suggest plays regulating growth, development, rice-planthopper interactions.