Fig. 1.

The sahy9/apum23 mutants show salt hypersensitivity. a-b Phenotypic comparison of plants under normal and salt stress conditions. Seedlings were grown for 10 days on basal medium without (a) or with 150 mM NaCl (b). The values indicate the means ± SD of three independent experiments, each with 100–150 seeds. **, P < 0.01, Student’s t-test. Scale = 1 cm. c Salt sensitivity. Plants were grown for 30 days on medium supplemented with 150 mM NaCl. The values indicate the means ± SD of three independent experiments, each with 100–150 seeds. **, P < 0.01, Student’s t-test. Scale = 1 cm. d-e: Comparison of root tips. The seedlings were grown on basal medium for eight or 9 days, and then transferred to medium supplemented with or without 150 mM NaCl for one (d) or two (e) days. The images were taken using a confocal microscope (e, right panel)