Biological nitrogen fixation at elevated temperature in different Azospirillum species and strains |
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Authors: | P Aggarwal K Chaudhary |
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Institution: | (1) Department of Microbiology, CCS Haryana Agricultural University, 125 004 Hisar, India |
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Abstract: | Nitrogenase activity, nitrogenase synthesis, and the growth of four species of Azospirillum were examined at 30°C and 42°C. Azospirillum brasilense Sp 7 did not synthesize nitrogenase at 42°C nor was the enzyme stable at this temperature. In A. lipoferum 708 and A. brasilense 12S the nitrogenase activity was stable at 42°C but the synthesis of nitrogenase was reduced. In A. brasilense Sp 9 the nitrogenase activity was stable and showed the highest C2H2 reduction activity at 42°C. |
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Keywords: | Azospirilla Nitrogenase activity Elevated temperature Acetylene reduction activity Azospirillum brasilense Azospirillum lipoferum |
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