Agrochemical resistant mutants of nitrogen fixing cyanobacteriumTolypothrix tenuis as nitrogen fertilizer for rice |
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Authors: | Selwin P Thomas R Kamalaveni S Shanmugasundaram |
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Institution: | (1) Department of Microbiology and Microbial Technology, School of Biological Sciences, Madurai Kamaraj University, 625 021 Madurai, India;(2) Present address: Department of Biology, Life Sciences Building, Memphis State University, 38152 Memphis, TN, USA |
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Abstract: | Summary Agrochemical resistant mutants of nitrogen fixing cyanobacteriumTolypothrix tenuis were isolated after MNNG mutagenesis. The mutants exhibited higher nitrogenase activity and released more quantities of extracellular nitrogenous, substances such as ammonia, indole acetic acid like substances and amino acids when compared to the parent. They also increased the available nitrogen status of the soil in rice culture. Significant increase in the growth and yield upon inoculation of these mutants into rice culture was observed in comparison with chemical nitrogen fertilizer urea, as well as the parent strain treament. |
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