Vegetos- An International Journal of Plant Research

  • Year: 2005
  • Volume: 18
  • Issue: 1and2

Cumulative Effects of N P K and Mg Salts with Plant Growth Hormones on Growth and Some Nitrogen Metabolizing Enzyme and Soluble Protein in Rhizobium sp.

  • Author:
  • Barnali Dey, Ramesh C. Srivastava
  • Total Page Count: 5
  • DOI:
  • Page Number: 1 to 5

Plant Physiology and Biochemistry Research Laboratory, Department of Life Sciences, Tripura University, Surjyamaninagar Campus, West Tripura–799 130, Agartala, INDIA.

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Abstract

The symbiont Rhizobium sp. was isolated from root nodules of Vigna radiata cultivated in the field. The isolate was sub-cultured in Yeast Extract Mannitol Broth (YEM) that was supplemented with optimum concentration of N, P, K and Mg salts and three plant growth hormones (IAA, GA and kinetin) and their various combinations. The growth behaviour, nitrate reductase (NR) activity, nitrite reductase (NiR) activity, nitrogenase (N-ase) activity and soluble protein were found to be enhanced with treatment of N, P, K and Mg salts and plant growth regulators (IAA, GA and kinetin) and their various combinations at different hours (24 to 120h) after inoculation.

Keywords

Growth hormone, Rhizobium, Nitrogen metabolism