Ecology, Environment and Conservation Paper

Vol.14, Issue 2-3, 2008; Page No.(367-369)

EFFECT OF TRACE ELEMENTS ON GROWTH OF TWO ANOXYGENIC PHOTOTROPHIC BACTERIA

M. Ramchander, M.S.K. Prasad. Girisham and S.M. Reddy

Abstract

Two anoxygenic phototTophic bacteria Rb.capsulatus and Rps.acidophila, isolated from leather industrial effluents were studied for the effect of trace elements on the growth. Rb.capsulatus was less dependent on zinc when compared to Rps.acidophila preferred higher concentrations of nickel when compared to Rb.capsulatus. Copper, borate and manganese requirement was the same for both the bacteria under investigation. The biomass production decreased both with the decrease or increase of copper concentration. Both the bacteria could achieve considerable growth even in the absence of cobalt and molybdate.

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