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Effects of Mn-excess on CO2assimilation (A), stomatal conductance (B), and intercellular CO2 concentration (C), initial Rubisco activity (D and E), total Rubisco activity (F and G) and Rubisco activation state (H) in sour pummelo leaves. Bars represent means ± standard errors (n = 4-8). Different letters above standard error bars indicate significant differences at P < 0.05.
