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Articles by N.C.S. Yadav
Total Records ( 2 ) for N.C.S. Yadav
  M. Sridevi , K.V. Mallaiah and N.C.S. Yadav
  Rhizobium species isolated from Crotalaria species (C. junceaC. laburnifoliaC. retusa and C. verrucosa) were tested for their ability to solubilize tricalcium phosphate (TCP). Among these four species, Rhizobium sp. isolated from Crotalaria retusa and C. verrucosa showed zone of TCP solubilization on Pikovskaya`s agar medium. Highest solubilization index (2.70) was observed in Rhizobium sp. from C. retusa. Effect of different carbon and nitrogen sources was also studied. Among the carbon sources, glucose was found to be best carbon source for TCP solubilization. Presence of highest concentration (3%) of glucose enhanced TCP solubilization. Among the nitrogen sources, ammonium sulphate was the best promoter for the process. Addition of low levels (0.5µg mL-1) of EDTA increased TCP solubilization.
  M. Sridevi , N.C.S. Yadav and K.V. Mallaiah
  Cultural and nutritional conditions were optimized for Indole Acetic Acid (IAA) production by Rhizobium spp. isolated from root nodules of Crotalaria juncea, C. retusa, C. laburnifolia, C. verrucosa and C. alata. The isolates produced maximum amount of IAA after 72 h of incubation and at 2.5 mg mL-1 L-tryptophan concentration. The effect of different carbon and nitrogen sources on IAA production were also studied and it revealed that, mannitol and L-glutamic acid were the best promoters for IAA production. Addition of cell wall affecting agents increased the IAA production over controls. Among the five isolates of Crotalaria species, maximum amount of IAA was produced by isolate from C. retusa. The compound from Rhizobium sp. from C. retusa was extracted, purified and structurally confirmed as IAA.
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