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Efflux of [3H]Gln by roots and shoots of 2-week-old Arabidopsis seedlings. Uptake and efflux were performed for 20 and 10 min, respectively, using 2 mM Gln. Efflux from shoots (A) and roots (B) are expressed as a percentage of total uptake. Error bars correspond to the standard deviation (n=4 biological replicates). Significant differences (P<0.05) are indicated by different letters according to one-way ANOVA in conjunction with Tukey’s test.
