Fig. 2

The nrt1.5 and lks2 mutant maintains primary root growth on low K⁺ medium. A Root growth phenotype of wild-type Arabidopsis (Col), nrt1.5 and lks2 and the nrt1.5 complementation line NRT1.5 COM under low potassium stress. Seeds were germinated on MS medium for 4 days, and then the seedlings were transferred to MS or LK (low K⁺, 0.1 mmol/L) medium for 3 days, bar = 1 cm. B The lengths of the primary root growth 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