FIGURE 1.

Stem water potential (SWP) (A,B), leaf stomatal conductance (g_s) (C,D), leaf net carbon assimilation (A_N) (E,F), and intrinsic water use efficiency (WUE) (G,H) from Cabernet Sauvignon grapevines (clone FPS08), subjected to different replacements of crop evapotranspiration (25% ET_c, 50% ET_c, and 100% ET_c) and collected through the 2019 and 2020 growing seasons in Oakville, CA, United States. Values represent means ± SEM (n = 6). At each time point, different letters indicate significant differences (p ≤ 0.05) between irrigation treatments according to one-way ANOVA followed by Duncan’s new multiple range test. *, **, and *** indicate significance at 5, 1, and 0.1 % probability levels, respectively.