![]() ![]() praecox) belongs to the Calycantaceae family and is a 2.5- to 3.0-m tall deciduous shrub native to China. Keywords: ethylene abscisic acid gibberellic acid cytokinins vase life flower break strength senescence-related gene ![]() ![]() 6-BA, GA 3, or ABA had no significant effect on flower opening and senescence of wintersweet. ZT promoted flower opening and increased vase life by 1.6 days. Ethylene dramatically induced the expression of the CpSRG1 gene, while 1-MCP suppressed it. 1-MCP slowed opening, delayed senescence, and prolonged vase life by 2.6 days. It also decreased flower break strength, indicating the induction of abscission. Ethylene treatment accelerated flower opening and senescence, decreasing vase life by 2.1 days. The expression pattern of CpSRG1, a senescence-related gene, was analyzed. In addition, abscisic acid (ABA), gibberellic acid (GA 3), two cytokinins, 6-benzylaminopurine (6-BA), and zeatin (ZT) were also applied. We applied ethylene and 1-methylcyclopropene (1-MCP an ethylene action inhibitor) to test the role of ethylene in flower opening and senescence. The vase life of fresh cut flowers is 8–9 days. Wintersweet ( Chimonanthus praecox) is a woody garden plant with fragrant flowers, which blooms in deep winter. ![]()
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