Cadmium mediated control of nitrogenase activity and other enzymes in a nitrogen fixing cyanobacterium.

Abstract

Cadmium decreased the specific growth rate and total cell mass at concentrations > 0.001 micrograms ml-1. It also reduced heterocyst frequency, total cell protein, nitrogenase activity (acetylene reduction) and decreased glutamine synthetase (GS) and glutamate synthase (GOGAT) activities. However, cells grown under low concentration of cadmium (0.001… (More)

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