THE CROWN gall: TECHNIC 



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Fig. 339. — A. Section of crown gall on tobacco due to Bacterium tumefaciens. 

 Teratoma developing on the cut end of an inoculated internode. Tumor below 

 and a dwarfed shoot above developing out of it. 



B. Tissue of leaf from A (at A') showing the palisade tissue reversed, i.e., 

 facing away from the sky. 



