Fig. 7

Changes of ethylene response of WT and hcc1 with D-galacturonic acid treatment. A Changes of ethylene contents after D-galacturonic acid (D-GA) treatment after 9 days in WT and hcc1 at the seedling stage (Ss). B Changes of the relative expression levels of HCC1 after D-GA application in WT at the Ss. Water was treated as control. C Changes of PG activity in the leaves after D-GA application at the Ss in WT Water was treated as control. D Leaf blades senescence phenotype of WT and hcc1 after D-GA (100 mg/L) treatment under dark-induced conditions at the Ss. Water was treated as contronl. 4 days at room temperature 28 ℃. E Ethylene response phenotypes of seed germination of WT and hcc1. Water was treated as control. 4 days after seed germination at room temperature 28 ℃. F Coleoptile length (CL) and root length (RL) of WT and hcc1 in response to ethephon (300 mg/L). Mean and SD were obtained from three independent measurements. Statistical analysis was performed using two-tailed Student’s t-test, * and ** indicate p < 0.05, p < 0.01, respectively, and “ns” indicates no significant difference. Scale bar in D = 5 cm, in E = 1 cm