Fig. 6.

Expression patterns of ClMPKs (a) and ClMKKs (b) in response to abiotic stress and ABA. Three-week-old plants were treated by drought (placing on lab bench without water supply), salt (drenching with 200 mM NaCl), heat (42 °C) and cold (4 °C) stress or by foliar spraying with 100 μM ABA and leaf samples were collected at 12 h after treatment. Relative expressions as folds of the actin transcript level are presented as the means ± SD from three independent experiments. ** on the columns indicate significant difference at p ≤ 0.05 between the treatments and corresponding controls. CK, control; Dr, drought; Sa, salt; He, heat; Co, cold