STUDIES ON CHARACTERIZATION OF HYPER PHOSPHATE SOLUBILIZING MUTANT STRAIN OF Bacillus licheniformis

Simple item page
dc.contributor.advisorCHAUHAN, ANJALI
dc.contributor.authorGAURAV, KUMAR
dc.date.accessioned2016-11-10T15:40:52Z
dc.date.available2016-11-10T15:40:52Z
dc.date.issued2016
dc.description.abstractABSTRACT Plant growth promoting rhizobacteria (PGPR) are root associated bacteria and benefit plants by providing growth promotion by a variety of mechanism. The present study was focused on hyper phosphate solubilization by mutagenesis of wild strain (WS) of B. licheniformis originally isolated from apple rhizosphere. Ultraviolet (UV) rays, Ethyl methanesulphonate (EMS) and Ethidium bromide (EtBr) mutagens were used to enhance the phosphate solubilizing ability of wild strain. Forty mutants were selected on the basis of phosphate solubilizing index (PSI) and change in colony morphology. Only one mutant PM7 with hyper phosphate solubilization was obtained after treating WS with UV rays for 100 minutes of exposure. Of all the mutants tested, PM7 was selected, as there was approximately 2 fold increase in P-solubilization over wild type. Mutant PM7 showed higher PSI together with higher IAA and siderophore production 43.00 µg/ml and 103.09 % SU, respectively. Mutant PM7 also showed high antifungal activity against Phytophthora capsici (64.44 % G.I), Fusarium oxysporum (62.30 % G.I) and Dematophora necatrix (65.12 % G.I) in comparison to WS. Thus, mutant PM7 was selected for net house trial on growth promotion of tomato. Remarkably, enhanced root/shoot parameters, P-uptake and available P content of soil at 50 % of recommended dose of tricalcium phosphate was recorded as compared to WS and control. The result obtained in the present study, indicate toward the great potential of hyper Psolubilization of mutant strain of Bacillus licheniformis to be developed as biofertilizers to enhance soil fertility and plant growth.en_US
dc.identifier.urihttp://krishikosh.egranth.ac.in/handle/1/84931
dc.language.isoenen_US
dc.subMicrobiology
dc.subjectinorganic acid salts, bacteria, mutants, planting, biological development, growth promoters, productivity, fungi, acidity, vegetative propagationen_US
dc.subjectPlant growth promoting rhizobacteria (PGPR)en_US
dc.these.typeM.Sc
dc.titleSTUDIES ON CHARACTERIZATION OF HYPER PHOSPHATE SOLUBILIZING MUTANT STRAIN OF Bacillus licheniformisen_US
dc.typeThesisen_US
Files
Original bundle
Now showing 1 - 1 of 1
No Thumbnail Available
Name:
PDF M.Sc. Thesis Gaurav Rana (2016).pdf
Size:
2.07 MB
Format:
Adobe Portable Document Format
Description:
Basic Sciences(M.Sc.)
Download
License bundle
Now showing 1 - 1 of 1
No Thumbnail Available
Name:
license.txt
Size:
2.28 KB
Format:
Item-specific license agreed upon to submission
Description:
Download
Collections
Theses