Fig. 1

The temporal variations in physiological status of K. obovata under the natural frost conditions and exogenous ABA treatment. a soluble sugar content, b soluble protein content, c proline content, d SOD activity, e POD activity, f CAT activity, g MDA content. The data are presented as the means of three replicates (± SDs). Different uppercase letters indicate significant difference among different stages of cold event under the same ABA concentration at P < 0.05; lowercase letters indicate significant difference among different ABA concentrations under the same stage of cold event at P < 0.05