Fig. 4.
Thylakoid membrane pmf and the partitioning of pmf into its ∆ψ and ∆pH components in tobacco leaf at different times during a prolonged water deficit, and measured at the growth irradiance. (A) ECSt, a measure of pmf. (B) ECSss, a measure of ∆ψ. (C) ECSinv, a measure of ∆pH. (D) ∆pH as a percentage of the total pmf. Data are shown for WT (gray bars), AOX overexpressors (B8, left closed bar; B7, right closed bar), and AOX knockdowns (RI9, left open bar; RI29, right open bar). Data are the mean±SE of three independent experiments (n=3). Within each data set, plant lines not sharing a common letter are significantly different from one another (P<0.05). In data sets without letters, there are no significant differences across plant lines.