NEMATOSPORA LYCOPERSICI 



291 



each half of the cell. (Fig. 138, 7 and 8.) The ascospores are very 

 long: they have the shape of a spindle (2 to 3/x, wide and 38 to 40 /x 

 long) and are equipped with a long cilium at one end. During ger- 

 mination the cilium disappears and the ascospore takes the appear- 

 ance of a short cell which may produce buds at both extremities. 

 This yeast vegetates only on a solid medium. In liquid media, it 

 stops budding and develops only a sterile mycelium. To this fifth 

 group of yeasts seems to belong a species found by Btitschli in a 

 Nematode Tylenchus pellucidus. 



NEMATOSPORA LYCOPERSICI. Schneider 1 



Schneider has recently described a yeast isolated from tomatoes 

 secured from a restaurant in Berkeley, California. The proprietor 

 stated that the tomatoes came 

 from the South Sea islands. 

 The tomato appeared to be 

 normal except for the foci of 

 infection which were depressed 

 and reddish brown in color. 

 Schneider characterizes this 

 yeast as follows: 



"Asci of gametic origin 

 soon becoming free from as- 

 sociated cells, cylindrical with 

 rounded ends, 60 to 70 jit in 

 length; ascospores in two 

 groups of four spores each, 

 two-celled, slender, with 

 pointed ends, slightly ridged 

 at transverse septum; 50 X 

 4.5jii; ascospores liberated by 

 dissolution of the ascus wall 

 and held together somewhat Fig. 138-A. Nematospvra Lycopersid. Show- 

 in groups of 4 by motionless ing the Shape of the Cells and the Formation 

 a a > A of Daughter Cells (after Schneider), 



flagellae; flagellae 50 to 100 ^ 



in length; arthrospores of non-gemetic origin, spherical to ampulliform, 

 25 /i in diameter. Two other cell forms also found: (l) much elon- 

 gated filamentous cells; (2) elliptical or ovoid cells, gametic in func- 

 tion, new cells formed in bipolar direction by apical budding and also 



1 Schneider, A. A parasitic saccharomycete of the tomato. Phytopathology 

 6 (1916) 395-399. Further note on a parasitic saccharomycete of the tomato. 

 Phytopathology, 7 (1917) 52-53. 



