Fig. 1

Effects of UV-B irradiation on biometric traits before and after recovery. Total FW (a, c) and ratio between FW of epigeal to hypogeal organs (b, d) of UV-B treated and control plants before (a, b) and after recovery (c, d). Treated plants were exposed to 100 μmol quanta m^− 2 s^− 1 and 6.08 kJ m^− 2 d^− 1 UV-B. UV-B was daily applied following a time course from 1 to 14 days. Control plants did not receive UV-B radiation. For recovery test, UV-B treated plants were transferred to control conditions for two weeks. Error bars represent the standard error of the mean (n = 3). The different letters indicate significant differences between means tested using Tukey’s HSD tests (P < 0.05). FW, fresh weight