Fig. 4.

Cross-sections of Merlot (A, B, E, F) and Concord (C, D, G, H) berries and pedicels following infusion of basic fuchsin through the distal end of berries attached to plants with (B, D, F, H) and without (A, C, E, G) their roots pressurized. Without root pressurization, red-colored dye was present in the xylem of the berries (A, C) and pedicels (E, G). With pressurization, dye was absent in berries (B, D) and pedicels (F, H). Scale bars refer to their respective rows of panels. c, cortex; p, phloem; vb, vascular bundle; x, xylem.