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Sarathambal, C.
- Screening of Diazotrophic Bacterial Communities from Wild Rice (Oryza indica) and Cultivated Rice (Oryza sativa) and their Plant Growth Promoting Activities
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1 Department of Agricultural Microbiology, Tamil Nadu Agricultural University, Coimbatore, T.N, IN
2 Department of Soil Science and Agricultural Chemistry, Tamil Nadu Agricultural University, Coimbatore, T.N, IN
1 Department of Agricultural Microbiology, Tamil Nadu Agricultural University, Coimbatore, T.N, IN
2 Department of Soil Science and Agricultural Chemistry, Tamil Nadu Agricultural University, Coimbatore, T.N, IN
Source
Asian Journal of Bio Science, Vol 8, No 1 (2013), Pagination: 63-68Abstract
A study was undertaken to screen the free living, culturable diazotrophic bacteria from wild rice (Oryza indica) and cultivated rice (Oryza sativa) and their plant growth promoting activities. Out of forty eight diazotrophic isolates, thirty eight isolates recorded positive growth in Nfree medium which were further analyzed for total nitrogen and ammonia. Based on total nitrogen and ammonia production, twenty eight diazotrophic isolates were selected for nitrogenase activity. The highest nitrogenase activity was exhibited by isolate GDR16 (413456.6 nm of ethylene mg-1 protein-1 hr). For PGPR activity 11 isolates from O.indica and 9 isolates from O.sativa with elite nitrogenase activity were selected for PGPR as well as mineral solubilization studies. Out of these 20 diazotrophic isolates, 11 isolates showed IAA production. The maximum amount of IAA was produced by CBE1 (35.5 1.14g ml-1). The highest amount of GA was produced by GDR13 (21.70.19 g ml-1), followed by GDR 7 which produced 18.40.23 g ml-1. The maximum siderophore production was recorded with CBE1 (43.94 0.64g mg-1 dry weight of cell of catechol type). With respect to mineral solubilization, 17 were able to solubilze the insoluble phosphorus and 7 were able to solubilze the zinc. The results of the present study showed the diazotrophic bacteria associated to both wild and cultivated rice and it having variety of plant growth promoting substances in considerable amounts apart from diazotrophy.Keywords
Rice, Diazotrophs, Oryza Indica, Oryza Sativa, Pgpr
References
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- Optimization of Liquid Phospho Bacteria Required for Maize Seeds
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Authors
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1 Department of Agricultural Microbiology, Tamil Nadu Agricultural University, Coimbatore (T.N.), IN
1 Department of Agricultural Microbiology, Tamil Nadu Agricultural University, Coimbatore (T.N.), IN
Source
Asian Journal of Bio Science, Vol 4, No 1 (2009), Pagination: 53-55Abstract
The survival of the Bacillus cultures on the seeds of the maize was tried in different combinations. One ml inoculum with one ml adhesive combination or sterile water showed better results followed by 1.5 ml inoculum with 0.5 ml adhesive or sterile water. In 1.5 ml inoculum and 0.5 ml adhesive combination, adherence and survival population of phosphobacterial cells were maximum (6.5Ă—105 cfu/seed) for the treatment of sporulated inoculum with rice gruel.Keywords
Phosphobacteria, Liquid Inoculum, Maize.- Solubilization of Insoluble Zinc Compounds by Gluconacetobacter diazotrophicus and its Influence on Maize
Abstract Views :163 |
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Authors
Affiliations
1 Department of Agricultural Microbiology, Tamil Nadu Agricultural University, Coimbatore (T.N.), IN
1 Department of Agricultural Microbiology, Tamil Nadu Agricultural University, Coimbatore (T.N.), IN