A Study on Characterization, Growth Response and Nitrogen Fixing Efficacy of Fungicide Resistant Rhizobium

V Nithyakalyani, M Kannan, K. Lakshmi


Rhizobium acts as a primary symbiotic fixer of nitrogen. The present study was focused on isolation, biochemical characterization, temperature, pH,   salt tolerance and Fungicide tolerance ability and nitrogen fixing efficacy  of Rhizobium sp. from root nodules of leguminous plant Groundnut from different areas in the semi arid regions of Tamil Nadu. Out of 43 isolates, 10 strains were found to be effective in detoxifying the fungicide used in the current study, fixed nitrogen even in the presence of Carbendazim and tolerated up to 5%Nacl concentrations. Therefore such  isolates may be beneficial strains to improve growth and development of leguminous plants under various environmental stress conditions.


Rhizobium, Nitrogen fixation, Fungicide detoxification, Leguminous plants

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