Evaluarea performanţelor de creştere a cianobacteriei Nostoc gelatinosum Schousboe ex Bornet & Flahault cultivată pe diferite medii nutritive [Articol]

Abstract

The growth performance of the cyanobacterium Nostoc gelatinosum is dependent on the composition of the nutrient medium. Mediums rich in macroand microelements favored rapid biomass accumulation and accelerated the growth cycle, in contrast to the deficient medium, which limited cell mass production but stimulated the dimensional expansion of vegetative cells without causing morphological abnormalities. Periodic observations revealed a self- regulating mechanism of cell dimensions, in which the alternation of expansion and contraction phases respects the fundamental biological principles of development. These results emphasize the applicability of these media both for the efficient obtaining of biomass for biotechnological purposes and for the stable maintenance of cultures in collections.