196 



A TEXTBOOK OF THEORETICAL BOTANY 



has exhausted the food supply, meiosis occurs and the whole plasmodium 

 becomes separated into uninucleate portions, around each of which a wall 



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Fig. 187. — Plasmodiopkora brassicae. Host cells 

 filled with spores. 



is laid down. Thus the host cell becomes filled with a mass of spores 

 (Fig. 187). 



Fig. 188. — Spongospora suhterranea. Spores in cells of 

 infected Potato. Note the different arrangement of 

 the spores in this genus and in Plasmodiopkora. 



