OBSERVATION ON THE FREQUENCY OF HETEROCYSTS AND ROLE OF HETEROCYSTS IN SPORULATION IN ANABAENA (CYANOPHYCEAE)

Abstract

The relationship of photosynthesis to light intensity in natural algal populations is of considerable theoretical interest. Most of the works concern with chemical composition of the media. This investigation is the result of the study of the effect of intensity and quality of light and various nutrient media on frequency of heterocyst formation and role of heterocysts in sporulation in three species of Anabaena cylindrica Lemm: A. hallensis (Janz.) Born. et Flah, A. variabilis Kutz.