52 INTERRELATIONSHIPS AMONG MICROORGANISMS 



mechanisms of antagonism. Often one organism may completely check 

 the growth of another j later, growth may be resumed, although it will 

 not be quite normal. Antagonism stimulates spore-production and 

 brings about deformed growth of the mycelium in fungi or the forma- 

 tion of gigantic cells in bacteria. The morphological effects produced 

 by the antagonists comprise changes in form, size, and structure of 

 hyphae, direction of growth, complete cessation of growth, and ab- 

 breviation of hyphal segments. 



