Figure 6.
Decrease of NO3– Influx in the Very-High-Affinity Range in the nrt2.4 Mutants under N Starvation Condition.
Seedlings were grown on MGRL-based vertical plates for 8 d on 10 mM NO3–then for 5 d without N. 15NO3– influx was measured after 5 min of labeling in complete nutrient solution containing 0.01, 0.025, and 0.1 mM 15NO3–. The values are means ± se (n = 8) of biological replicates. Asterisks indicate statistically significant differences between the wild type (Col-0) and mutants (P < 0.01). DW, dry weight.