Ethylene-influenced development of tree peony cut flowers and characterization of genes involved in ethylene biosynthesis and perception

Three ethylene receptor genes were isolated and clustered with AtETR1, AtERS1, AtEIN4, respectively. Expression patterns of genes involved in ethylene signal pathway were tested during development of the two cultivars and in response to exogenous ethylene and 1-MCP. Expression patterns of PsERS1 and PsEIN4 showed significant differences between 'Luoyang Hong' and 'Xue Ying Tao Hua'. Besides, PsEIL2, PsEIL3 and PsERF1 may play a role in regulation of ethylene response of tree peony. The present study provides insights into ethylene biosynthesis and signal transduction in tree peony cut flowers. However, further studies were needed to verify the gene function and to understand the mechanism underlying postharvest development of tree peony.