Abstract
Filamentous cyanoprokaryotic Anabaena variabilis was subjected to an externally applied electric field of 10 amperes for 2 hours, in an electric chamber designed for the experiment. The effect of electric current was seen on the growth, survival and heterocyst differentiation of the investigated strain. Interesting growth pattern with remarkable increase in the percentage of heterocyst were observed when treated cells were compared with control. Heterocyst frequency was seen to increase from a mere 5% to 10.22% together with incidence of multiple heterocysts. This could possibly be due to abnormal nitrogen fixation by the treated sample cells.
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