FIG. 3.

Culturability and viability of R. solanacearum isolated from infected plants. Tomato plants were inoculated with culturable forms of R. solanacearum. At various times after inoculation, bacteria were isolated from four different tissue samples and the concentrations of viable (open symbols) and culturable (solid symbols) forms of the bacteria were determined as described in Materials and Methods. The four tissues assayed were root tips (squares), stem from the first to second node (diamonds), first true leaf (triangles), and terminal leaf (circles). Bars, standard errors.