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    • Abstract

       

      InNeurospora crassa,0.44 mM Be2+ caused half-maximal inhibition of growth and this inhibition could be fully counteracted by the addition of 2.5 mM Ca2+ to the medium. Mn2+ and Mg2+ were less effective in reversing the growth inhibition caused by Be2+ and the order of effectiveness was Ca2+ > Mn2+ > Mg2+. Fe3+ and Zn2+ were ineffective in reversing Be2+ toxicity.

      Pyruvate, malate and succinate also reversed the growth inhibition caused by Be2+ inN. crassa. Pyruvate restored growth by a mechanism not involving control of Be2+ accumulation in the mould. The rate of utilisation of glucose by the mycelia grown in the presence of Be2+ was reduced, while that of pyruvate was not affected. The results indicate that the primary metabolic lesion in Be2+ toxicity inN. crassa is probably a block at some step(s) in the glycolytic sequence.

    • Author Affiliations

       

      A Naidu1 J Nirmala1 K Sivarama Sastry1

      1. Department of Biochemistry, Osmania University, Hyderabad - 500 007
    • Dates

       
  • Journal of Biosciences | News

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