State Key Laboratory of Ecological Pest Control for Fujian and Taiwan Crops, Institute of Applied Ecology, Fujian Agriculture and Forestry University, Fuzhou, China.
International Joint Research Laboratory of Ecological Pest Control, Ministry of Education, Fujian Agriculture and Forestry University, Fuzhou, China.
mSystems. 2023 Dec 21;8(6):e0082623. doi: 10.1128/msystems.00826-23. Epub 2023 Nov 1.
In this study, we identify an important role of gut bacteria in mediating the adaptation of diamondback moth (DBM) to plant secondary metabolites. We demonstrate that kaempferol's presence in radish seedlings greatly reduces the fitness of DBM with depleted gut biota. Reinstatement of gut biota, particularly Enterobacter sp. EbPXG5, improved insect performance by degrading kaempferol. This bacterium was common in the larval gut of DBM, lining the epithelium as a protective film. Our work highlights the role of symbiotic bacteria in insect herbivore adaptation to plant defenses and provides a practical and mechanistic framework for developing a more comprehensive understanding of insect-gut microbe-host plant co-evolution.
在这项研究中，我们确定了肠道细菌在介导小菜蛾（DBM）适应植物次生代谢物方面的重要作用。我们证明了萝卜幼苗中存在的山柰酚大大降低了肠道微生物群耗竭的 DBM 的适应性。肠道微生物群的恢复，特别是肠杆菌属 EbPXG5 的存在，通过降解山柰酚来改善昆虫的表现。这种细菌在 DBM 的幼虫肠道中很常见，作为一种保护性薄膜排列在肠上皮细胞上。我们的工作强调了共生细菌在昆虫食草动物适应植物防御方面的作用，并为更全面地了解昆虫-肠道微生物-宿主植物的共同进化提供了一个实用的和机械的框架。
