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The effects of drought on the total glutathione and homoglutathione (GSH and hGSH plus GSSG and hGSSG) pool (A–F) and percentage of reduced form (G–M) in the leaves at different leaf ranks. Data are the means ± s.e. of three different samples. Statistical differences for each time point between the control and drought are denoted by asterisks (*P < 0·05, **P < 0·01, ***P < 0·001).
