Fig. 8
CaAMT2;2 mediates the N uptake in transgenic tomato plants. (a, b) Growth performance of the wild-type (WT) plants and CaAMT2;2-overexpressing transgenic lines under deficient (0.25 mM NH4+) and NH4+-sufficient (2.5 mM NH4+) conditions. Two-week-old seedings were grown in the full nutrient solution for 2 weeks, and then transferred to different NH4+ solutions for 2 weeks. (c, d) Shoot and root biomass (fresh weight, FW) of tomato plants. (e, f) Total N content in the shoots and the roots. Values are means ± SE of six biological replicates (n = 6). Different letters indicate significant differences, P < 0.05