Fig. 6

Metabolism and response of WT and hcc1 to ethylene. A Comparison of ETH content in the leaves of WT and hcc1 at the seedling stage (Ss). B Comparison of ethylene contents in the leaves of KTK and KO1 at the seedling stage. C Changes in the relative expression of HCC1 after ETH treatment in WT at the Ss. Water was treated as contronl. D Comparison of PG activity in the WT leaves after ETH treatment at the Ss. Water was treated as contronl. E Leaf blades senescence phenotype of WT and hcc1 after ethephon treatment (300 mg/L) under dark conditions at the Ss. Water was treated as contronl, 4 days at room temperature 28 ℃, Scale bar = 5 cm. F Ethylene response phenotypes of seeds of WT and hcc1. Water was treated as control, 4 days after seed germination at room temperature 28 ℃. Scale bar = 1 cm. G Coleoptile length (CL) and root length (RL) of WT and hcc1 in response to ethephon (300 mg/L). Data presented in G is the average of 20 seedlings. Mean and SD were obtained from three independent measurements in image A–D. Statistical analysis was performed using two-tailed Student’s t-test, ** indicates p < 0.01, and “ns” indicates no significant difference