Nitrogen fixing efficiency and physiological characteristics of Azospirillum isolates from the paddy fields of North Bengal

  • Md Mozammel Hossain Department of Biochemistry and Molecular Biology, Jahangirnagar University, Savar, Dhaka-1342
  • Salina Akter Department of Biochemistry and Molecular Biology, Jahangirnagar University, Savar, Dhaka-1342
  • Md Mahmudul Hasan Department of Biochemistry and Molecular Biology, Jahangirnagar University, Savar, Dhaka-1342
  • Ashraful Hasan Department of Biochemistry and Molecular Biology, Jahangirnagar University, Savar, Dhaka-1342
  • Kazi Rasel Uddin Department of Biochemistry and Molecular Biology, Jahangirnagar University, Savar, Dhaka-1342
  • Afroza Parvin Department of Biochemistry and Molecular Biology, Jahangirnagar University, Savar, Dhaka-1342
  • Iffat Jahan Department of Biochemistry and Molecular Biology, Jahangirnagar University, Savar, Dhaka-1342
  • Nazibur Rahman Department of Biochemistry and Molecular Biology, Jahangirnagar University, Savar, Dhaka-1342
  • SM Badier Rahman Department of Biochemistry and Molecular Biology, Jahangirnagar University, Savar, Dhaka-1342
Keywords: Azospirillum, isolates, north Bengal, pH, temperature, salinity, biofertilizer

Abstract

The microbial activity of ten selected Azospirillum isolates was measured in terms of the amount of CO2 evolved by the isolates after incubation for 5 days which ranged from 6.88 to19.25 mg. Nitrogen fixing efficiency all of the isolates was determined by microkjeldhal method and the nitrogen fixing efficiency ranged from 10.03 to 13.11 mg N/g substrate. The growth of Azospirillum isolates was significant affected by different physiological factors such as pH, temperature and salinity. Most of the isolates showed optimum growth at pH 6.8, temperature 37°C and in the absence of NaCl. Azospirillum has the potential to be used as a substitute and or supplement of N-fertilizers. Further research is needed to estimate N-supplement potentials of biological nitrogen fixation (BNF) systems at the farm level.

Jahangirnagar University J. Biol. Sci. 3(1): 47-53, 2014 (June)

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Author Biography

Md Mozammel Hossain, Department of Biochemistry and Molecular Biology, Jahangirnagar University, Savar, Dhaka-1342


Published
2016-06-19
How to Cite
Hossain, M. M., Akter, S., Hasan, M. M., Hasan, A., Uddin, K., Parvin, A., Jahan, I., Rahman, N., & Rahman, S. (2016). Nitrogen fixing efficiency and physiological characteristics of Azospirillum isolates from the paddy fields of North Bengal. Jahangirnagar University Journal of Biological Sciences, 3(1), 47-53. https://doi.org/10.3329/jujbs.v3i1.28277
Section
Original Research Articles