Figure 2.

K⁺, Na⁺ and K⁺/Na⁺ of two asparagus cultivars under 7 d and 15 d after salt stress. A and J represent Apollo and JL1,7 and 15 mean the days after salt stress, respectively. Different lowercase letters in the bar graph indicate significantly different from the control at p < 0.05. CK, meaning seedlings were watered by Hoagland solution without NaCl, and SS, meaning seedlings were subjected to salt stress of 120 mM NaCl.