Fig. 3.

Associations between berry total soluble solids (TSS) and (A) xylem-mobile dye location inside berries and (B) transpiration rate (E) per berry of Merlot (closed circles), Syrah (open circles), and Concord (open squares) grapes. The extent of dye movement was quantified as 1 (dye in brush or proximal end only) to 6 (dye throughout berry vasculature). All P<0.001, n>50. Curves were fitted by the Lowess method. Inset in A shows extensive red-colored dye movement in a green hard berry (left) but not in an adjacent green soft berry (right) on the same Syrah cluster after 30 min of dye infusion.