J04 



A TEXTBOOK OF THEORETICAL BOTANY 



layer. During the migration of the protoplast the nucleus begins to divide 

 until some thirty-two nuclei have been formed, when planes of cleavage 



Fig. 195. — Synchytrium endobioticum. Wart Disease on Potato. 



appear and walls are laid down, cutting the body into some four or five 

 zoosporangia, each enclosed in a separate wall, and the whole lying inside 

 the original inner membrane. 



Prosorus 







e-A, i# 



V 



Fig. 196. — Synchytrium endobioticum. Section of Potato showing prosori. 



In these zoosporangia further nuclear division goes on until about three 

 hundred nuclei have been produced in each sporangium. Around these 



