STUDIES ON MINERAL PHOSPHATE SOLUBIUZINC BACTERIA IN THE VERTISOLS OF NORTHERN KARNATAKA
| dc.contributor.advisor | Vikram Alagawadi, A R | |
| dc.contributor.author | Appanna | |
| dc.date.accessioned | 2019-07-15T12:36:07Z | |
| dc.date.available | 2019-07-15T12:36:07Z | |
| dc.date.issued | 2001 | |
| dc.description.abstract | "Investigations were carried out on the mineral phosphate solubilizing bacteria in the vertisols of Northern Kamataka and their relationship with soil physical, chemical and microbiological properties was analysed. The correlation coefficient worked for PSB population to that of soil properties indicated a strong positive correlation between PSB population and that of total bacteria, soil organic carbon and available N, whereas, other properties had no significant correlation with PSB population. In a ftirther attempt to develop suitable strains of PSB for vertisols, 55 PSB strains from rhizosphere of various crop plants grown on vertisols were isolated, identified and screened for their efficacy to solubilize different insoluble phosphates. Pseudomonas and Bacillus were the predominant genera among the isolates. Thirty efficient PSB isolates were then analysed for production of organic acids, lAA and GA. Most of the isolates produced 2 - 4 different organic acids, as well as lAA and GA. Based on the efficiency of mineral phosphate solubilization, lAA and GA production, 16 strains were selected for pot culture experiment with greengram and sorghum as test plants. Most of the PSB strains significantly enhanced the nodulation, growth, drymatter content and P uptake in greengram plants at 45 DAS over RP control. The growth, drymatter content, P uptake and yield of sorghum plants were also enhanced significantly over RP control by many strains. Based on the performance under pot culture conditions, seven efficient strains were selected for field performance with greengram crop. Six of them significantly increased the grain yield of greengram over RP control. However, strain 98(2) showed significantly higher grain yield over SSP control also. The transformation and expression ofpqq genes in Azospirillum was done by mobilizing the construct pMCG898 into MPS"" Azospirillum by biparental mating and the transconjugants obtained were able to solubilize dicalcium phosphate without alteration in their N2 fixing abilities" | en_US |
| dc.identifier.citation | No. of references 224 | en_US |
| dc.identifier.uri | http://krishikosh.egranth.ac.in/handle/1/5810114658 | |
| dc.keywords | STUDIES ON MINERAL PHOSPHATE SOLUBIUZINC BACTERIA IN THE VERTISOLS OF NORTHERN KARNATAKA | en_US |
| dc.language.iso | en | en_US |
| dc.pages | 259 | en_US |
| dc.publisher | UNIVERSITY OF AGRICULTURAL SCIENCES GKVK, DHARWAD | en_US |
| dc.research.problem | STUDIES ON MINERAL PHOSPHATE SOLUBIUZINC BACTERIA IN THE VERTISOLS OF NORTHERN KARNATAKA | en_US |
| dc.sub | Agricultural Microbiology | en_US |
| dc.subject | null | en_US |
| dc.theme | STUDIES ON MINERAL PHOSPHATE SOLUBIUZINC BACTERIA IN THE VERTISOLS OF NORTHERN KARNATAKA | en_US |
| dc.these.type | M.Sc | en_US |
| dc.title | STUDIES ON MINERAL PHOSPHATE SOLUBIUZINC BACTERIA IN THE VERTISOLS OF NORTHERN KARNATAKA | en_US |
| dc.type | Thesis | en_US |