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Effect of cold stress on the GSH metabolism in rice leaves. a, GSH + GSSG; b, GSH; c, GSSG; d, GSSG/GSH; e, GR activity; f, GSH1; g, GSH2. GSH, glutathione; GSSG, glutathione disulphide (Oxidant glutathione); GR, glutathione reductase. Vertical bars denote standard deviations (n = 4). A t-test was conducted to compare the difference between control and cold stress within a cultivar. * denotes P < 0.05
