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Histidine sensitive strain of the blue-green alga Nostoc muscorum: possible nif-his interactions

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Summary

A variant strain of the nitrogen-fixing bluegreen alga Nostoc muscorum, displaying impairment in its elemental nitrogen dependent growth and complete inhibition of growth by L-histidine in otherwise nitrogen-free medium, has been isolated and characterized for its response to L-glutamic acid and L-glutamine in presence of other inorganic nitrogen sources. A model based on the possibility of nif-his interaction has been proposed to account for the observed behaviour of the strain. It is inferred that the two sets of genes may occupy neighbouring positions on the blue-green algal genome.

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Authors and Affiliations

  1. Department of Botany, Banaras Hindu University, 221005, Varanasi, India

    P. K. Yadava & S. P. Singh

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  1. P. K. Yadava
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  2. S. P. Singh
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Communicated by H. Böhme

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Yadava, P.K., Singh, S.P. Histidine sensitive strain of the blue-green alga Nostoc muscorum: possible nif-his interactions. Molec. gen. Genet. 173, 153–157 (1979). https://doi.org/10.1007/BF00330305

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  • DOI: https://doi.org/10.1007/BF00330305

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