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Figure 51. Electron micrograph of virus aggregations 

 in CyMV-inf ected Cymbidium leaf cell 

 showing the presence of gold particles on 

 their surface. Section is incubated with 

 CyMV antiserum (1/2000 dilution) and 

 labelled with protein A-gold. Bar = 260 nm, 



Figure 52. Electron micrograph of virus-like 



structures in the same antiserum-treated 

 section as in Fig. 51, but showing no 

 specific reaction. Same treatment as in 

 Fig. 51 . Bar = 320 nm. 



