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

Figure 2.

Figure 2

Changes in the ortho-hydroxycinnamic acid (oHCA) contents during cold acclimation (15/13 °C), chilling (5 °C) and recovery in the leaves and roots of young maize plants: control plants (22/20 °C, 387 µmol m−2 s−1). Light intensities during hardening: GL: 387 µmol m−2 s−1; 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, and 0.01 levels, respectively. (A: free oHCA in the leaves; B: free oHCA in the roots).