寡雄腐霉菌株GAQ1对黄瓜猝倒病的防效及对黄瓜的促生作用OA
Biocontrol efficacy of Pythium oligandrum strain GAQ1 against cucumber damping-off and its growth-promoting effects on cucumber
生物防治因具有环境友好和安全性,在作物应对生物与非生物胁迫中备受关注,然而当前市场上的生物防治产品数量仍远不及化学农药.本研究以从生姜田块中分离获得的生防卵菌——寡雄腐霉(Pythium oligan-drum)菌株 GAQ1 为研究对象,系统评估了其对瓜果腐霉(Pythium aphanidermatum)的拮抗作用,对黄瓜猝倒病的防治效果以及对黄瓜植株的促生作用.结果表明,寡雄腐霉菌株 GAQ1 能够通过菌丝缠绕导致瓜果腐霉菌丝大面积失活或死亡.盆栽试验结果显示,寡雄腐霉菌株 GAQ1 处理显著降低了黄瓜猝倒病的发病率,病情指数由 71.9 下降至 21.9,防治效果达 69.57%.此外,黄瓜幼苗经 GAQ1 发酵液处理 28 d 后,黄瓜植株的株高、根长、叶片数、SPAD 值、地上部鲜重和地下部鲜重等生长指标均显著提高,增幅分别为 9.72%、65.48%、18.67%、5.74%、24.19%和 78.35%.综上所述,寡雄腐霉菌株 GAQ1 不仅对黄瓜猝倒病具有显著防治效果,还能明显促进植株生长.本研究结果为寡雄腐霉菌株 GAQ1 的开发与应用提供了理论数据,为瓜果腐霉所致病害的生物防治提供了新的候选菌株资源,对实现绿色农业可持续发展具有积极意义.
Biological control has garnered significant attention due to its environmental friendliness and safety in ad-dressing both biotic and abiotic stresses in crops.However,the number of commercially available biological control products remains far lower than that of chemical pesticides.This study focused on the biocontrol oomycete Pythium oligandrum strain GAQ1 ginger isolated from ginger field soil,and systematically evaluated its antagonistic effects against P.aphanidermatum,its efficacy in controlling cucumber damping-off,and its growth-promoting effects on cucumber plants.The results demonstrated that GAQ1 could achieve mycoparasitism through hyphal coiling,leading to exten-sive inactivation or death of P.aphanidermatum hyphae.Pot experiments revealed that GAQ1 treatment significantly reduced the incidence of cucumber damping-off,with the disease index decreasing from 71.9 to 21.9 and a control efficacy of 69.57%.Furthermore,after four weeks of GAQ1 treatment,the growth parameters of cucumber plants including plant height,root length,leaf number,SPAD value,aboveground fresh weight,and underground fresh weight were significantly enhanced,with increases of 9.72%,65.48%,18.67%,5.74%,24.19%,and 78.35%,respectively.In conclusion,P.oligandrum GAQ1 not only exhibited remarkable control efficacy against cucumber damping-off but also significantly pro-moted plant growth.This study provides data support for the development and application of GAQ1,offers a new candidate strain resource for the biological control of diseases caused by P.aphanidermatum,and holds significant importance for ad-vancing sustainable green agriculture.
魏黎欣;李泽宇;赵敏;苏东徽;周冬梅;魏利辉;乐秀虎;王楠
河北工程大学园林与生态工程学院,河北 邯郸 056038||江苏省农业科学院植物保护研究所,江苏 南京 210014江苏省农业科学院植物保护研究所,江苏 南京 210014||南京农业大学植物保护学院,江苏 南京 211800江苏省农业科学院植物保护研究所,江苏 南京 210014江苏省农业科学院植物保护研究所,江苏 南京 210014江苏省农业科学院植物保护研究所,江苏 南京 210014江苏省农业科学院植物保护研究所,江苏 南京 210014河北工程大学园林与生态工程学院,河北 邯郸 056038江苏省农业科学院植物保护研究所,江苏 南京 210014
农业科技
寡雄腐霉瓜果腐霉黄瓜生物防治促生作用
Pythium oligandrumPythium aphanidermatumCucumis sativusbiological controlgrowth-promoting effect
《江苏农业学报》 2026 (4)
701-708,8
国家特色蔬菜产业技术体系项目(CARS-24-C-01)邯郸市科学技术研究与发展计划项目(21422012329)
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