VITAMINS 



175 



A B C D E 



Fig. 31. Method of detecting common vitamin deficiencies of filamentous fungi. 

 Deficiencies are evident by failure to grow on media lacking the necessary vitamin or 

 vitamins. The above media contained: A, no vitamins; B, thiamine; C, bio tin; D, 

 thiamine and biotin; E, thiamine, biotin, inositol, and pyridoxine. The fungi, from 

 top to bottom, are Ceratostomella fimbriata, Sordaria fimicola, Pleurage curvicolla, and 

 C. ulmi. 



