GROWTH PATTERN, STRUCTURE, REPRODUCTION AND PERENNATION IN GLOEOCAPSA DECORTICANS (A.BR.) RICHTER...

Gloeocapsa is distinguished by the presence of saccate, pigmented, and lamellated envelopes encircling individual cells and colonies. A strain of Gloeocapsa ACC # 10802, designated as G. decorticans and taken from the Roxburgh garden at the University of Allahabad's Department of Botany, was investigated in depth. The strain was grown in various nutrient culture media and it was discovered that in nitrogen and phosphate deficient media, growth was slow and more mucilage was produced with hyaline concentric layers around individual cells, whereas in nitrogen rich medium, thallus size is greatly reduced due to less mucilage formation, but cells are comparatively larger and dark blue-green in colour. Depending on nutrition and light circumstances, species appear to create mucilage in the shape of concentric hyaline or coloured layers. The same may be said for cells, which can be either spherical or oblong depending on the circumstances. Binary fission in three or more planes is the most common type of reproduction, with daughter cells returning to their original size and shape before the next division. Many cells die as nutrients run out, however if it grows in enough liquid media, certain cells grow in size and are surrounded by thick mucilage with dark green content, like perennating cells in nature. The perennating cells are big and divide often under favourable conditions to generate new colonies.

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