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Authors
Affiliations
1 Department of Microbiology, Dr. G. R. Damodaran College of Science, Coimbatore-641 014, T.N., IN
Source
Nature Environment and Pollution Technology, Vol 7, No 1 (2008), Pagination: 123-126
Abstract
Azotobacter sp. is a gram-negative soil dwelling organism with a wide variety of metabolic capabilities which include the ability to fix atmospheric nitrogen by converting it to ammonia. In this study, 45 samples were positive out of 50 marine samples, collected from different locations of Rameshwaram marine region at the depth of 1-2m. The nitrogen fixing ability of the isolated Azotobacter sp. from marine source is compared with soil Azotobacter sp. and standard Azotobacter sp. by pot cultivation method by assessing the growth of green gram. Seed germination, shoot length, ischolar_main length and chlorophyll content were measured. Therefore, irrespective of the environment, marine Azotobacter sp. is capable of fixing atmospheric nitrogen in a terrestrial environment at a higher frequency rate. Since it is a non-symbiont, it can be a suitable for all kinds of crop plants as a biofertilizer.
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