Fig. 1

The nrt1.5 mutant possesses a longer meristem zone and elongation zone under low potassium stress. A Phenotype comparison of meristem zone and elongation zone length in wild-type Arabidopsis (Col), nrt1.5 and lks2. Seeds were germinated on MS medium for 4 days, and then transferred to MS or LK (low K⁺, 0.1 mmol/L) medium for 3 days, bar = 0.5 mm. B The lengths of the meristem zone and elongation zone shown in (A). Data are shown as means ± SE (n = 20). Student’s t-test (* P < 0.05; ** P < 0.01) was used to analyze statistical significance