南方根结线虫
短小芽孢杆菌
生物
无名地
根结线虫
根际
孵化
生物病虫害防治
园艺
拉伤
植物
线虫
细菌
生态学
动物科学
遗传学
解剖
作者
Mingming Dai,Rui Li,Hao Jiang,Xiaoping Zhang,Wenwen Song,Jie Zhang,Chen Liang,Haiping Zhao,Qianqian Shi
出处
期刊:Plant Disease
[Scientific Societies]
日期:2023-10-01
卷期号:107 (10): 3057-3063
标识
DOI:10.1094/pdis-10-22-2391-re
摘要
Root-knot nematodes (RKNs) are highly specialized parasites that cause significant yield losses worldwide. In this study, we isolated Bacillus pumilus strain S1-10 from the rhizosphere soil of Zingiber officinale Rosc. plants and evaluated its fumigant activity against Meloidogyne incognita. S1-10 exhibited a strong repellent effect on second-stage juveniles (J2s) of M. incognita, and in vitro assays indicated that S1-10 volatile organic compounds (VOCs) suppressed J2 activity and egg hatching. Under greenhouse conditions, 71 and 79% reductions of nematodes and eggs were detected on plants treated with S-10 VOCs compared with controls. Ten VOCs were identified through gas chromatography and mass spectrometry (GC-MS), of which 2-(methylamino)-ethanol (2-ME) had strong fumigant activity against J2s of M. incognita, with an LC50 value of 1.5 mM at 12 h. These results indicate that S1-10 represents a potential novel biocontrol agent for RKNs.
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