中国生物防治学报2026，Vol.42Issue(3)：569-581,13.DOI:10.16409/j.cnki.2095-039x.2025.09.019
水稻香豆素对褐飞虱的抗性作用
Resistance to the Brown Planthopper Afforded by the Secondary Metabolite Coumarin in Rice
摘要
Abstract
Secondary metabolites play a crucial role in plant defense against pests and diseases.Based on previous metabolomic analyses of rice,this study employed HPLC to determine the content of the target compound coumarin.The results revealed that,when the rice plants were infested by the brown planthopper(BPH),the coumarin content in the leaf sheaths of the resistant rice line R1 was increased by 2.88 folds compared to the susceptible line S9.When coumarin was added to an artificial diet at 0.1 mg/mL and 0.5 mg/mL and fed to BPH,the survival rates of nymphs decreased by 38.89％and 80％at 7 days after treatment,respectively,compared to the control.Coumarin stress also led to a reduction in adult female body weight,an average decrease of 89 eggs in oviposition,and a 16.29％reduction in egg hatchability.The abundance of endosymbiotic fungi was decreased by 49.73％at 5 days after treatment,with significant reductions observed in fungi such as Ascomycetes and Arsenophonus in various BPH tissues.Molecular docking analysis revealed the interaction characteristics between coumarin and the candidate target protein carbonic anhydrase in BPH,providing preliminary insights into the mechanism of coumarin's effects on BPH.This study elucidates the resistance role of rice-derived coumarin against BPH and its endosymbiotic fungi,offering new clues for understanding rice insect resistance mechanisms and for the development of environmentally friendly pest management strategies.关键词
水稻/香豆素/褐飞虱/共生菌Key words
rice/coumarin/brown planthopper/symbiotic bacteria分类
农业科技引用本文复制引用
姚欣璇,周雯润,陈桐桐,俞晓平,郝培应..水稻香豆素对褐飞虱的抗性作用[J].中国生物防治学报,2026,42(3):569-581,13.基金项目
浙江省自然科学基金(LD25C140001) （LD25C140001）
