Fig. 5

Phenotype of chrysanthemum CmHRE2-like overexpression and silencing plants. A The expression pattern of CmHRE2-like gene in different tissues of chrysanthemum ‘Jinba’. B Expression pattern of CmHRE2-like in response to waterlogging stress. C CmHRE2-like expression levels in CmHRE2-like transgenic lines. D CmACS6 expression levels in CmHRE2-like transgenic lines. E Ethylene production of CmHRE2-like transgenic lines and WT. F Phenotype of CmHRE2-like transgenic plants under natural growth conditions (0 d) and waterlogging (7 d) conditions. Red arrows indicate the injured leaves after waterlogging stress. Bar: 5 cm. G-I Physiological index determinations of CmHRE2-like transgenic and wild-type chrysanthemum under natural growth conditions (CK) and WL. G Percentage of injured leaves. N.D.: Not detected. H Chlorophyll content. I Electrolyte leakage. Error bars represent standard deviation (SD, n = 3). Lowercase letters indicate significant differences at P < 0.05 (ANOVA, Tukey’s correction)