Fig. 2From: Glutamine rapidly induces the expression of key transcription factor genes involved in nitrogen and stress responses in rice rootsAmino acid contents in the medium and in rice roots during the time course of glutamine treatment. a The hydroponic solution initially contained 2.5 mM glutamine and glutamine concentrations were measured over the 24-h time course. b-f Contents of Gln, Glu, Ala, Asp and Asn in the roots after 0–24 h of glutamine treatment. Fold change indicates the relative amounts of amino acids in 2.5 mM glutamine-treated roots (0.25–24 h) compared to those of control (0 h). Data are means ± SD (n = 4). Different letters indicate significant differences between treatments, tested by one-way ANOVA followed by Tukey’s test (P < 0.05)Back to article page