PLA?E 3 
Photomicrography from longitudinal sections of the tiller bases and crown of healthy 
and rosette-diseased Harvest Queen wheat plants. Material was killed and fixed in 
weak chrome-acetic fluid and stained with Heidenhain’s iron-alum haematoxylin. 
X 277. 
A. —Crown tissue from healthy plant. 
B. —Crown tissue from rosette-diseased plant. Note the cells containing intra¬ 
cellular bodies in addition to the nuclei and also the granular nature of the cells which 
have become necrotic. 
