Postharvest behavior and endogenous ethylene pattern of Paeonia suffruticosa cut flowers.

摘要

Thirteen cultivars of tree-peony were chosen as material to investigate changes of postharvest behavior and endogenous ethylene concentrations during opening and senescence of flowers. The flower opening index, diameter, senescence characters, ethylene production during opening, and senescence during vase life of cut flowers were investigated to elucidate the basic behavior and the postharvest pattern of endogenous ethylene production of t tree peony cut flowers. There were significant differences in ethylene production between the different cultivars and the 13 cultivars could be classified into 3 groups: (1) For 'Luo Yang Hong', 'Ru Hua Si Yu', 'Bai Hua Cong Xia', 'Ceng Zhong Xiao', 'Chun Hong Jiao Yan', and 'Yu Mian Tao Hua', ethylene production increased gradually during opening and reached a peak at the full open phase, then decreased. This pattern was similar to that in climacteric cut flowers and fruits. (2) For 'Tai Ping', 'Xue Ying Tao Hua', 'Rou Fu Rong', and 'Shi Ba Hao', ethylene production decreased or remained at a relatively stable level from opening to senescence. This pattern was similar to that in nonclimacteric cut flowers. (3) Ethylene production of 'Xue Lian' and 'Ying Ri Hong' cut flowers increased during opening and reached a peak at senescence. This pattern was similar to the ethylene increase during later stages cut flowers and fruits. Similar patterns were also found in flowers that opened naturally; however, for 'Luo Yang Hong', 'Bai Hua Cong Xia', and 'Yu Mian Tao Hua' were assorted to totally different types in the different opening conditions.