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首页> 外文期刊>National Academy Science Letters >In vitro studies of antagonistic behaviour of Rhizobium strain against phytopathogenic fungi.
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In vitro studies of antagonistic behaviour of Rhizobium strain against phytopathogenic fungi.

机译：Rhizobium 菌株对植物病原真菌拮抗作用的体外研究。

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摘要

Rhizobium strain was isolated from the root nodules of Trigonella foenumgraecum from the crop field near Gunupur, Orissa. The pure culture of the bacterium was maintained in the laboratory with Yeast extract-Mannitol (YEM) agar medium. Morphological and biochemical characteristics of the bacterium were studied. Siderophores production by the isolate was tested by Chrome-Azurol S (CAS) assay method. The bacterium was screened for its ability to inhibit against three fungal phytopathogens such as Macrophomina phaseolina, Fusarium oxysporum and Aspergillus niger. The results of the present study indicated that Rhizobium showed antagonistic effect against M. phaseolina and F. oxysporum. Both the phytopathogens were inhibited up to 58% of their growth after 5 days of culture. Scanning Electron Micrograph showed mycelia deformities like hyphal swelling, shriveling and leakage of cytoplasm of both the fungal phytopathogens. Therefore, the present study can be concluded that Rhizobium isolate is an efficient inhibitor of M. phaseolina and F. oxysporum but has no efficacy against Aspergillus niger.
机译：根瘤菌是从奥里萨邦古努普尔附近的农作物的根瘤菌根瘤中分离出来的。用酵母提取物-甘露醇（YEM）琼脂培养基将细菌的纯培养物保持在实验室中。研究了该细菌的形态和生化特性。分离物产生的铁载体通过Chrome-Azurol S（CAS）测定法进行测试。筛选该细菌抑制三种真菌植物病原体的能力，如 Macrophomina phaseolina ， Fusarium oxysporum 和 Niger Aspergillus niger 。本研究结果表明，根瘤菌显示出对 M的拮抗作用。菜豆和 F。羟孢菌。培养5天后，两种植物病原体都被抑制了多达58％的生长。扫描电子显微镜显示两种真菌真菌病原体的菌丝体畸形，例如菌丝肿胀，萎缩和细胞质漏出。因此，本研究可以得出结论，根瘤菌分离物是 M的有效抑制剂。菜豆和 F。羟孢菌，但对黑曲霉无效。

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