Studies on Toddy Yeast

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Abstract
SUMMARY1. Fifteen cultures of yeast were isolated from the toddy obtained from palmyra palm, Borassus flabellifer.2. Eight of the cultures belonged to Schizosaccharomyces pombe Lindner, six to Saccharomyces chevalieri Guilliermond and one to Saccharomycodes ludwigii Hansen.3. Schizosaccharomyces pombe strains were deficient in the synthesis of inositol and poor or subnormal in the synthesis of nicotinic acid. Six of them were completely or almost completely deficient in the synthesis of pantothenic acid. The remaining two strains synthesised pantothenic acid but were deficient in biotin.4. One of the strains of Schizosaccharomyces pombe analysed for its mating system proved to be homothallic. It also proved to be homozygous for the genes concerned in the synthesis of riboflavin, thiamin, biotin, and pyridoxin.5. All the six strains of Saccharomyces chevalieri fermented galactose in 48 hours. Analysis of single ascospore cultures from two of them showed that they were heterozygous for the fermentation of t...

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