Salinity and drought stress treatments
For the salinity stress treatment, 1-week-old seedlings were treated with different concentrations of NaCl solution (0, 50, or 100 mM) for 1 week. Fresh weights of root, leaf sheath, and leaf blade tissues were measured at 1 week after NaCl treatments. For the salinity stress treatment under soil-grown condition, 1-week-old seedlings were irrigated with 50 mM NaCl solution for 2 weeks. For the drought stress, 1-week-old seedlings were withheld irrigation for 1 week and rewatered for 1 week. Fresh weights of aerial shoots after salinity and drought stress treatment were measured.