Fig. 4.

Expression patterns of CmDREB6 in different organs and after 40 °C treatment. a Relative expression leveal of CmDREB6 in root, stem, leaf and flower of chrysanthemum. The expression of CmDREB6 was determined through qRT-PCR analysis. The expression level of CmDREB6 in root was set to 1, the error bars indicate the SE from three replicate samples. Asterisks indicate significant differences in expression levels of CmDREB6 in stem, leaf and flower compared with that in root. * represents significance at p < 0.05, ** represents significance at p < 0.01. b Relative expression leveal of CmDREB6 after 40 °C treatment. The expression of CmDREB6 was determined through qRT-PCR analysis. The expression level of CmDREB6 in WT was set to 1, the error bars indicate the SE from three replicate samples. Asterisks indicate significant differences in expression level of CmDREB6 under heat stress compared with WT at 0 h, 1 h, 3 h and 24 h, respectively, * represents significance at p < 0.05, ** represents significance at p < 0.01