Effect of different nutrient sources on the production of plant growth regulators (PGRs) by fluorescent Pseudomonas species

Shweta Sharma; Mohinder Kaur

Volume : IV, Issue : X, October - 2014

Effect of different nutrient sources on the production of plant growth regulators (PGRs) by fluorescent Pseudomonas species

Shweta Sharma, Mohinder Kaur

Abstract :

Plant growth regulators are important secondary metabolites produced by fluorescent Pseudomonas sp. such as auxins, gibberellic acid and cytokinins which play significant role in increasing the root surface and length that help in plant growth promotion and development. Two strains of fluorescent Pseudomonas sp. An–1– kul and An–13–kul were found to produced plant hormone i.e. auxins, gibberellins and cytokinins. The plant hormone production was further evaluated by using different media (succinate, King’s B, nutrient, peptone water and trypticase soya oth) and nutrient sources i.e. carbon (Sucrose, D–Glucose, Meso–ionositol) and nitrogen sources (L–tryptophan). In the studies it was found that nutrient oth was best among all the media used for plant hormone production and media amended with tryptophan was found best for auxins production and D–glucose was found best for production of gibberellins and cytokinins.