248 



Higher Plants and Soil Microorganisms 





Fig. 98. Microorganisms pliotographed on roots processed with iormalin-acetic- 

 alcohol and lactophenol with acid fuchsin: a, optical section of a massi\e bac- 

 terial colony completely encircling the base of a lettuce root Iiair; /;, bacterial 

 cf)lonies distributed over young maize root; c, relati\ely large spherical to o\oid 

 cells of undetermined nature clustered on pineapple root hairs ( from Linford ) . 



