Transmission electron microscopy for observations of stem cells of bean (Phaseolus vulgaris L.), inoculated with Curtobacterium flaccumfaciens pv. flaccumfaciens (Cff) showed some alterations in the xylen vessels of highly resistant genotypes with formation of estruture like tyloses and occurrence of fibrillas envolving the bacterial cells. In susceptible genotypes, Cff colonized xylem vessels as well as vascular parenchyma cells and metaxylem vessels.
Phaseolus vulgaris; bacterial wilt; transmission electron microscopy
