100 PHYSIOLOGY OF THE FUNGI 



P. betae S. sclerotioruni 



Pleurage curvicolla Sderotium bataticola 



Pyronema confluens Septoria nodorum 



Pythiomorpha gonapodyoides Sordaria fimicola 



Pythium debaryanum Sphaeroholus stellatus 



P. intermedium Sphaeropsis malorum 



P. irregular e Trichoderma lignorum 



Rhizodonia solani VerticiUium albo-atrum 



Sderotinia minor Xylaria mali 



Several of the species in the above Hst were reported by Young and 

 Bennett (1922) and others by Robbins and Kavanagh (1942). Some 

 reports are found in the papers of various authors, while some of the fungi 

 have been observed in our laboratory (see Fig. 17 for illustrations). 



Fungi which utilize ammonium nitrogen. In the nitrogenous com- 

 pounds found in fungi the nitrogen is in the same state of oxidation as in 

 ammonium compounds. The following is a partial list of fungi which 

 have been reported or observed to require ammonium or organic nitrogen 

 and to be unable to assimilate nitrate nitrogen: 



Absidia coerulea M. putillus 



A. cylindrospora M. ramealis 



A. diibia M. rotula 



A. glauca M. scorodonius 



A. orchidis Monilinia frudicola 



Basidiobolus ranarum Mortierella rhizogena 



Ceratostomella fimbriata Mucor flavus 



C. ulmi M. hiemalis 



Choanephora cucurbitarum M. nodosus 



Cyathus striatiis M. pyriformis 



Endothia parasitica M. saturninus 



Lenzites trabea M. stolonifer 



Marasmius alliaceus M. stridus 



M. androsaceus Phycomyces blakesleeanus 



M. chordaiis Pleurotus ostreatus 



M. epiphyllus Rhizophlydis rosea 



M. foetidis Rhizopus nigricans 



M. graminum R. oryzae 



M. performis Sporodina grandis 



M. personatus Zygorrhynchus moelleri 



A number of fungi in the above list were listed by Robbins (1937). 

 The studies on Marasmius are reported by Lindeberg (1944). Others are 

 reported by various authors, while some have been observed in our 

 laboratory. Obviously, this list is far from complete, and numerous 

 common fungi have been omitted from both this and the previous list 

 because of lack of definite information regarding their ability to utilize 

 nitrate nitrogen. 



