158 



BACTERIAL DISEASES OF PLANTS 



FIG. 98. Cross-section of a turnip root showing a parenchyma cell with Bacterium 

 campestre filling the intercellular spaces. X 1000 circa. 



r %m -i; - /: 



.i'M. Sfe ' .& 



FIG. 99. Longitudinal section of root of an inoculated turnip showing Bac- 

 terium campestre occupying a vessel and cells at the left. X circa 800. The in- 

 oculation was made on the leaves by needle pricks. 



