STRUCTURE OF YEAST PLANT 



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various substances, may appear in the surrounding 

 cytoplasm (Fig. 14, C). 

 Conditions of Life. " Wild " yeasts are found in 



FIG. 14. Yeast plant (Saccharomyces) . A, yeast cells budding and 

 forming chains, x 200. c.w., cell wall ; ppm., protoplasm ; vac., 

 vacuole. B, two cells forming buds. The black granules are 

 volutin, a complex organic substance formed by the yeast cell. 



C, diagram of the structure of a yeast cell made up from informa- 

 tion about its structure obtained from treating and staining the 

 cell with various reagents; n.v., nuclear vacuole; /., nucleolus ; 

 chr., chromatin; gl., glycogen (after Wager and Penistone). 



D, formation of four spores within a cell. 



exposed sugary secretions or exudations of plants, 



for instance in the " nectar " of flowers, in the drops 



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