National Academy of Agricultural Sciences (NAAS)
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PRINT ISSN : 2319-7692
Online ISSN : 2319-7706 Issues : 12 per year Publisher : Excellent Publishers Email : editorijcmas@gmail.com / submit@ijcmas.com Editor-in-chief: Dr.M.Prakash Index Copernicus ICV 2018: 95.39 NAAS RATING 2020: 5.38 |
Now a days there is a growing interest among the farmers for using naturally occurring microorganisms in agriculture to reduce the use of chemical fertilizers and pesticides in agriculture and increase the application of organic inputs like biofertilizers and biocontrol agents. Among different microorganisms the Rhizobium, Azotobacter, Azospirillum, Mycorrhiza, Trichoderma and Pseudomonas fluorescens have been explored and registered for commercial use. However, the use of methylotrophic microorganisms in agriculture have not been explored much, hence an experiment was conducted to isolate, screen and characterize the efficient plant growth promoting methylotrophic bacteria from rhizosphere soils of rice. As many as fifteen methylotrophic bacteria were isolated from the rhizosphere soil of paddy. Further, all the isolates were screened for their plant growth promotional traits viz., phosphate, potassium, zinc and silicon solubilization. Out of 15 isolates tested, 4 bacterial isolates (SMB – 1, SMB – 5, SMB – 6 and SMB – 10) showed maximum phosphate solubilization index of 2.53, 3.10, 5.00 and 5.03 respectively. Further the same isolates also showed good potassium and zinc solubilization potentialities under in vitro conditions as they resulted potassium solubilization index of 4.77, 5.56, 4.03 and 4.13. Similarly, with respect to zinc solubilization the efficient isolates showed 4.56 by SMB - 5, 2.69 by SMB – 6 and 6.05 by SMB - 10 of zinc solubilization index. However, among four efficient methylotrophic bacterial isolates, the SMB – 10 showed the silicon solubilizing ability (0.72 silicon solubilizing index) in in vitro conditions. Further, based on morphological and biochemical characterization studies, the efficient isolates were identified as Methylococcus sp, Methylobacterium sp, Methylosarcina sp and Methylorubrum sp. Scale of studied are required to develop and evaluate the efficient methylotrophic bacteria consortia on growth and yield of rice under pot and field condition.
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