蜡蚧轮枝菌JMC-01介导的甘蓝抗桃蚜效应OA

Lecanicillium lecanii(JMC-01)can form symbionts after colonizing cabbage plants to defend against My-zus persicae.We tested the toxicity of JMC-01 and JMC-01-cabbage symbionts to Myzus persicae by leaf spraying method and observed the infection of JMC-01 to Myzus persicae.We further analyzed the defense-related pathway changes of cabbage plants after colonization by JMC-01 by transcriptomic sequencing.JMC-01 showed 75％viru-lence against adult aphids at five days post-infection,while the JMC-01-cabbage symbiont induced 58.67％and 66.67％mortality in adults and 1st-instar nymphs,respectively.Nymphal mortality was significantly higher than that of adult aphids.The infection patterns of mycelial in Myzus persicae depended on the inoculation method,either through direct spraying with JMC-01 spore suspension or via feeding on colonized leaves.Direct application of spore suspension demonstrated superior infection efficacy and mortality rates against Myzus persicae.Furthermore,cabbage plants inoculated with JMC-01 exhibited altered defense-related gene expression,with a total of 989 differentially expressed genes being identified.GO enrichment and KEGG pathway analyses revealed significant alterations in de-fense-related pathways,including hydrolytic enzyme activity acting on glycosyl bonds,cell wall metabolism,photo-synthesis-antenna proteins,glucosinolate biosynthesis,MAPK signaling-plant pathway,and sulfur metabolism.Le-canicillium lecanii(JMC-01)can enhance plant resistance through endophytic colonization,with significant poten-tial for application in biological control systems.