Fig. 12

A diagram showing the Mg-deficient effects on gas exchange, Chl a fluorescence parameters, ROS and MG metabolism in C. sinensis roots (magenta), lower (in blue) and upper (in green). In this Figure, we used italics for enzymes and plain format for metabolites. Data from Figs.1–8. Enzyme activities were expressed on a DW basis. Values were the ratios of Mg-deficiency to Mg-sufficiency. An asterisk indicates a significant difference between Mg-deficiency and Mg-sufficiency at P < 0.05. An enzyme or metabolite was considered increased or decreased when it had both a relative change of more or less, respectively, than 1 and a P-value of < 0.05. Metabolite concentrations or enzyme activities were assayed on a whole tissue extract and not on a subcellular level. GCL: Glutamate-cysteine ligase; g_s: Stomatal conductance; NADH-GOGAT: NADH-dependent glutamine-2-oxoglutarate aminotransferase; γGC: γ-glutamylcysteine; TA: ASC + DHA; TG: GSH + GSSG; Tr: transpiration