123 



Aspergillus niger utilizes D-xylose and L-arabinose but not their 

 enantiomorphs, as is shown in Table 23. Many of the pentoses listed 

 in Table 23 are difficult to obtain in quantity, which accounts for the 

 varied amounts used per culture. 



Table 23. The Amount of Growth and Sporulation of Aspergillus niger on 



Various Pentoses 

 Time of incubation, 4 days. Cultures incubated at 35°C. (Steinberg, Jour. Agr. 

 Research 64, 1942.) 



Herrick (1940) found Stereum gausapatum to utilize xylose better than 

 arabinose, while Aspergillus oryzae utilizes arabinose better than xylose, 

 (Tamiya, 1932). Lentinus lepideus utilizes xylose (Nord and Vitucci, 

 1947). A comparative study of five fungi on xylose and arabinose indi- 

 cated that xylose was utilized either more completely or more rapidly 

 than arabinose (Margolin, 1942). The data of Margolin are given in 

 Table 24; for comparable growth of these species on other sugars, see 

 Table 22. 



