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枯草芽胞杆菌与氟环唑联用对禾谷镰孢霉的增效作用机制

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Keywords: 枯草芽胞杆菌,禾谷镰孢霉,氟环唑,联用,增效机制

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Abstract:

为验证枯草芽胞杆菌与氟环唑联用对禾谷镰孢霉的增效作用,用平板倒扣法和固体平板扩散法―打孔法测定菌药联用后枯草芽胞杆菌挥发性物质、抗真菌蛋白对禾谷镰孢霉的抑菌活性,观察抗真菌蛋白对禾谷镰孢霉菌丝形态的影响,并用刚果红染色法测定菌药联用后枯草芽胞杆菌纤维素酶活性.结果表明:菌药联用对禾谷镰孢霉的最高抑菌活性可达74.44%,表现增效和持效作用;枯草芽胞杆菌挥发性物质和抗真菌蛋白分别与氟环唑联用均可增强禾谷镰孢霉抑菌活性;菌药联用后枯草芽胞杆菌纤维素酶活性提高.研究表明枯草芽胞杆菌与氟环唑联用的增效机制是增强枯草芽胞杆菌挥发性物质对禾谷镰孢霉的抑菌活性,抗真菌蛋白活性的提高加强了禾谷镰孢霉菌丝溶解的程度,纤维素酶活性的增强提高了禾谷镰孢霉空间竞争作用和生物防治潜能.

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