Table 2.

V_max (μmol gDW^-1 h^-1) and K_m (μM) values for ¹⁵${\mathrm{NO}}_{\mathrm{3}}^{\mathrm{-}}$ influx in WT, RNAi-7, and RNAi-16.

	WT	RNAi-7	RNAi-16
Vmax	115 ± 9.47a	40.2 ± 3.27b	42.8 ± 2.89b
Km	66.7 ± 5.77a	72.4 ± 4.68a	73.1 ± 7.54a

Plants were grown in 10 mM KNO₃ for 25 days and then deprived of N for 5 days. Roots were then exposed to 1 mM KNO₃ for 6 h prior to measuring ¹⁵${\mathrm{NO}}_{\mathrm{3}}^{\mathrm{-}}$ influx at various ¹⁵${\mathrm{NO}}_{\mathrm{3}}^{\mathrm{-}}$ concentrations. Values shown are means (n = 30) ± standard error. Different letters between the three lines denote significance at P < 0.05 by Tukey’s HSD-test.