Effect of mycorrhizal growth stimulatory compounds on spore production and biocontrol of soil-borne plant pathogens in fruit orchards

从丛枝菌根孢子中分离到3株细菌，经鉴定为芽孢杆菌、苏云金芽孢杆菌和根际拟杆菌。这些细菌对土传植物病原菌尖孢镰刀菌、死斑病菌、立枯丝核菌和腐霉也有生物防治作用。此外，它们对土壤中磷的溶解、乙烯的产生、固氮酶的活性以及对菌根菌丝的体外生长都有促进作用。此外，用原位扫描电子显微镜拍摄了新鲜的孢子和菌丝样品，在菌丝和孢子上发现了一些细菌粘液。

Three kinds of bacteria were isolated from arbuscular mycorrhizal spores and identified as Bacillus sp., Bacillus thuringiensis, and Paenibacillus rhizospherae. These bacteria also functioned on biocontrol of soil-borne plant pathogens Fusarium oxysporum, Rosellinia necatrix, Rhizoctonia solani and Pythium ultimum. Moreover, they were effective on phosphorus solubilization, ethylene production, nitrogenase activity, and stimulation of mycorrhizae hyphal growth in vitro. In addition, fresh samples of spores and hyphae were photographed using an in situ scanning electron microscope, where some bacterial slimes were detected on hyphae and spores.