Figure 1

Stem-cortex cell’s area changes of S. europaea after 2 months in Cie (a–f) and Inw (g–l) populations grown under different NaCl concentrations. Scale bar 150 μm. n = 300 ± 50 cells, 12 individuals per treatment. S: correspond to the degree of succulence in the stems17,24. The F value of S that corresponds to the 2-way ANOVA for the interaction salt treatment × population is F5,48 = 5.5; p < 0.001.