Effects of Al and B interactions on F
(D), OEC (E), φ
(G) and δ
(H) of dark-adapted Citrus grandis leaves. Each point is mean of 8 – 10 replicates with standard error. Diagonal cross area quantifies the Al effect under different B supply. Difference among eight treatments was analyzed by 2 (Al levels) × 4 (B levels) ANOVA. (A) P values for Al, B, and the interaction between the two were 0.0135, 0.0248 and 0.0085, respectively; (B) – (G) P values for Al, B, and the interaction between the two were all < 0.0001; (H) P values for Al, B, and the interaction between the two were < 0.0001, 0.1995 and 0.2667, respectively. Different letters indicate significant differences among eight treatments at P < 0.05.