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    • Keywords


      Nitrogenase activity; Azospirillum brasilense ; Azospirillum lipoferum ; C4 grasses; Chloris ; Cenchrus ; Cynodon ;

    • Abstract


      The nitrogenase activity (N2-fixation) ofAzospirillum isolated from the root region of C4Digitaria, Chloris, Cynodon, Dichanthium, Lasiurus andCenchrus growing in different tracts of Rajasthan, was studied in spot batch cultures on sodium malate medium both under air and 1% oxygen at regular intervals of 24 h for a span of 7 days. The morphological and cultural characteristics ofAzospirillum strains belonging tolipoferum andbrasilense group (both nir+ and nir) have also been studied. The strains oflipoferum group performed better and exhibited more N2-ase activity on agar surface under 1% O2 and associated with the roots compared to the strains ofbrasilense group.

    • Author Affiliations


      V M Rao1 Jayshree1 Banwari Lal1 P Shailaja1 H S Narayana1

      1. Department of Botany, University of Rajasthan, Jaipur - 302 004, India
    • Dates


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