Taxonomic and ecophysiological studies on phyllospheric yeasts of triticum vulgare

ABSTRACT

Studies of some polysaccharides produced by the isolates revealed that Rhodotorula glutinis T1 form a copious extracellular heteropolysaccharide material. It was found to be composed to mannose, galactose and minor traces of glucuronic acid. On the other hand, Cryptococcus magnus T2 was found to produce starch-like compounds that are released outside the cells under low pH conditions and on a variety of sugars as carbon sources. The starch formation increased proportionally with glucose concentrations up to 10% final concentration after five days of growth. However, no correlation between the extent of growth and starch release could be detected