Abstract

Summary The contents of Cyanophycin and glycogen increased with the onset of initiation of sporulation in Anabaena torulosa and the relative amounts of these two may increase or decrease with free spore stage. Urea supported maximum formation of both the reserve products amongst the nitrogen sources tested. The incorporation of amino acids; aspartic acid and arginine together favoured more Cyanophycin and it is further enhanced in the presence of chloramphenicol, thus signifying the non-ribosomal synthesis of Cyanophycin as reported by earlier workers. These findings are supported by the protein content of the sporulating cells. The supplementation of ammonium chloride along with chloramphenicol resulted in early sporulation concomitant with an increase in Cyanophycin content and a decline in the protein content.

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