-55- 



Figure 55. Electron micrograph of virus particles 



distributed within the cytoplasm of CMV- 

 infected Phalaenopsis leaf cells. Section 

 was incubated with CMV antiserum (1/1000 

 dilution) and labelled with protein A-gold 

 Pd : Plasmodesma. CW:Cell wall. Bar = 350 nm. 



Figure 56. Same tissue and treatments as in Fig. 55, 



except that incubation was with normal serum 

 (1/500 dilution). Note the background of 

 nonspecific reaction (arrows). CWrCell wall. 

 Bar = 350 nm. 



