Root knot nematodes (RKNs) pose a great threat to agricultural production worldwide. The bacterial nematocides have received increasing attention due to their safe and efficient control against RKNs. Here, we investigated the biocontrol efficacy of Paenibacillus polymyxa J2-4 against Meloidogyne incognita in the field and analyzed the rhizosphere microbiome of cucumber under nematode infection after application of the J2-4 strain. Furthermore, a biomarker strain of Pseudomonas spp. was isolated from the J2-4-inoculated rhizosphere soil, and its nematocidal activity and growth-promoting effect on host plants were determined. In addition, chemotaxis assay of P. fluroescens ZJ5 toward root exudates was carried out.

中文翻译：

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Paenibacillus polymyxa J2-4 诱导黄瓜富集根际假单胞菌，并有助于田间条件下的 Meloidogyne incognita 管理


根结线虫 （RKN） 对全球农业生产构成巨大威胁。细菌杀虫剂因其对 RKN 的安全有效控制而受到越来越多的关注。在这里，我们在田间研究了多粘芽孢杆菌 J2-4 对 Meloidogyne incognita 的生物防治效果，并分析了施用 J2-4 菌株后线虫侵染下黄瓜的根际微生物组。此外，从接种 J2-4 的根际土壤中分离出一株假单胞菌属生物标志物菌株，并确定了其杀线虫活性和对寄主植物的促生长作用。此外，还对 P. fluroescens ZJ5 对根系分泌物进行了趋化性测定。