Fig. 7.

Relative Na⁺ concentration in the meristem, elongation, and mature zone in root epidermis (A) and stele (B) of Col-0, aca8, aca11, cax4, and cax11 under normoxic non-saline or combined salinity and hypoxia treatments for 24h. The relative Na⁺ concentration was calculated by the fluorescence integrated density using Image J software. Data are the mean ± SE (n=30–40 cells from one individual plant with at least nine replicate plants). Different lower case letters indicate the significant difference at P<0.05.