Interaction Between Azospirillum Brasilense Cd and Wheat Root Cells During Early Stages of Root Colonization
Following inoculation of wheat seedlings by A. brasilense Cd, the bacteria were strongly adsorbed to soil particles, but could migrate in the soil towards the plants. Upon reaching the wheat roots, the bacteria formed relatively small aggregates on the root surface, and a larger internal population within the cortex; no bacteria were found in the vascular system. Several bacteria penetrated into young live root cells, but most were free in the intercellular spaces or bound to cortical and epidermal cell walls by an electron dense material. The bacteria induced an increase in the rate of proton extrusion of the roots as well as an increase in cell division of the root tip.
KeywordsRoot Hair Root Surface Intercellular Space Root Colonization Wheat Root
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