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. 2020 Mar 12;21(6):1942. doi: 10.3390/ijms21061942

Figure 1.

Figure 1

Changes in the salicylic acid (SA) contents during cold acclimation (15/13 °C), chilling (5 °C) and recovery in the leaves and roots of young maize plans: control plants (22/20 °C, 387 µmol m−2 s−1). Light intensities during hardening: growth light (GL): 387 µmol m−2 s−1; low light (LL): 107 µmol m−2 s−1. *, **, *** significant differences compared to the control plants on the same day at the p < 0.05, 0.01 and 0.001 levels, respectively. #, ##, ### significant differences compared to the GL plants on the same day at the p < 0.05, 0.01 and 0.001 levels, respectively. (A: free SA in the leaves; B: bound SA in the leaves; C: free SA in the roots; D: bound SA in the roots).