Suppressive effect of Methylobacterium fujisawaense against root-knot nematode, Meloidogyne incognita
2009
Prabhu, S. | Kumar, S. | Subramanian, S. | Sundaram, S.P.
Pink Pigmented Facultative Methylotrophs (PPFMs) are ubiquitous in nature found in variety of habitats including soil, dust, fresh water lake sediments, leaf surface and nodules. These organisms are capable of growing on compounds containing one carbon. These bacteria influence seed germination and seedling growth by producing plant growth regulators like zeatin and related cytokinins. They are also capable of inducing systemic resistance against various plant pathogens. Experiments were conducted under controlled conditions to study the effect of Methylobacterium fujisawaense culture filtrate on root-knot nematode Meloidogyne incognita egg hatching, juvenile mortality and penetration into roots of tomato in the present study. The results of experiments revealed that, the isolate of M. fujisawaense TNAU 14 inhibited egg hatching to the highest degree (99.6%) at 100 per cent concentration within 24h. The same isolate also caused highest mortality of M. incognita juveniles (100%) within 72h at cent per cent concentration. Besides the least (10.7%) rooJ: penetration by the infective juveniles of M. incognita in tomato was also registered by the above isolate. The PGPR, Pseudomonas fluorescens ranked next to the TNAU 14 isolate of M. fujisawaense in aU the observations made in the present study.
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