204 



FAMILY OF SACCHAROMYCETACEAE 



has cells intermediate between the two previous species, forms its 

 ascs at the end of four days and produces a ring at 32 C., but never 

 forms a scum. 



SCHIZOSACCHAROMYCES SAUTAWENSIS. Nakazawa 



This species was isolated by Nakazawa from sugar in Formosa. It 

 has elliptical cells when grown in beer wort (7.28.4 X 4.8 usually, 



rarely 7.2- 19.2 X 4.8 jx). The 

 optimum temperature for growth 

 on beer wort is 32 C. Ascs 



Fig. 80-C. Schizosac- 

 charomyces sautawensis. 

 Vegetative Cells. 



6, c, and h, Copulation ; d, ascs ; /, f 1 , 

 germination of spores (after Naka- 

 zawa). 



Fig. 80-D. Schizosaccharomyces 

 formosensis. 



6, c, c 1 , Copulation of the asc; /, germi- 

 nation of spores (after Nakazawa). 



are formed at the end of seven days. They are derived from 

 an isogamic copulation, possessing ellipsoidal ascospores without 

 glycogen and with starchy walls (2.5 X 3 to 3.75 ju). A ring is 



formed at from 25 to 32 C., but 

 none is produced at 37 C. It 

 gives a scum at from 25 to 27 C. 

 It ferments dextrine, dextrose, 

 d-mannose, d-galactose, d-fructose, 

 saccharose, maltose, raffinose and 

 a-methylgluco^ide. 



SACCHAROMYCES NOK- 

 KOENSIS. Nakazawa 



Isolated under the same con- 



8( >_ E . _ Schizosaccharomyces ditions as the preceding type, this 

 Nokkoensis. yeast possesses- ellipsoidal cells on 



spores; beer wort (9.6-10.8 X 3.6-5.25, 

 rarely 4.8-16.6 X 3.6-5.2 /x). The 

 optimum temperature for growth in beer wort is 32 C. Ascs are 

 formed after two months, without a copulation. The ascospores are 

 ellipsoidal, spherical, or hemispherical (3X5 microns) without glycogen 

 and with starchy walls. A ring is produced on beer wort at 25-32 C. 



a, Vegetative cells; 6, germinating 

 g, ascs (after Nakazawa). 



