Growth of marine yeast on different strength of stress solutes

Abstract

Sixteen isolates of marine yeasts belonging to genera Candida, Debaryomyces, Rhodotorula and Saccharomyces, isolated from the (EEZ) of India were screened for their growth on different concentrations of sodium chloride (NaCl). Most of them showed excellent growth at 4% and good growth at 65% NaCl. Species of red yeast Rhodotorula lost its pigment production at 6%, except R. rubra which grew up to 16% NaCl with faint pigmentation. Six species of genera Debaryomyces, Saccharomyces and Rhodotorula were tested against the stress solutes NaCl (0-16%), potassium chloride (KCl) and sodium sulphate (Na sub(2) SO sub(4)) at 0.4%, 4% and 8% concentrations. D. hansenii and D. marama were the most versatile isolates exhibiting excellent growth in all the concentrations of the three stress solutes, while S. cerevisae and R. glutinis exhibited good tolerance in NaCl, but failed to do so in KCl and Na sub(2) SO sub(4) .