Fig. 1

Phenotypes of two rice genotypes under chilling stress and subsequent recovery. A Comparison of seedlings of Yu17S and MH63 in control, treated at 4 °C for 12 h, 48 h and recovery for 24 h after 48 h treatment. B Determination of photochemical efficiency of PS II system in Yu17S and MH63 under cold stress (2–48 h) and recovery for 24 h after 48 h treatment. C Chlorophyll content in Yu17S and MH63 under cold stress (2–48 h) and recovery for 24 h after 48 h treatment. FW, fresh weight; Error bars indicate the SD for three independent replicates. * and ** indicate a significant difference between MH63 and Yu17S at P < 0.05 and P < 0.01 levels, respectively (two tailed T-test)