The residual effect of 1-methylcyclopropene in protecting Phalaenopsis flowers against ethylene injury
Wei-Li Lin, Nean Lee and Yao-Chien Chang
Abstracts of 27th International Horticultural Congress & Exhibition (IHC 2006), August 13-19, 2006, COEX (Convention & Exhibition), Seoul, Korea. 494 pages.
2006
บทคัดย่อ
Flowers of Phalaenopsis are generally sensitive to ethylene.1-methylcyclopropene (1-MCP) has been found effective in protecting flowers against ethylene injury in many crops.Evaluating the period of 1-MCP protection on Phalaenopsis could offer critical information on postharvest process.For this purpose, we pretreated Phal. amabilis with 0.8 μL-L-1 1-MCP for 8 hours and, then, at various times following 1-MCP treatment, some of these plants were fumigated with 2 μL-L-1 ethylene for 12 hours to determine the residual protection. In the first experiment, flowers were exposed to ethylene at 0, 5, 10, 15, 20, or 30 days after 1-MCP treatment; and in a repeated experiment, after 0, 4, 6, 8, 10, 12, or 14 days.The results indicated 1-MCP could completely protect flowers and buds from ethylene for at least six days, which is longer than the average marketing needs.There was no residual protection 12 days after 1-MCP treatment.During the 6-12 days after treatment, 1-MCP had partial protection on Phalaenopsis, the inflorescence still lasted much longer than those that were not pretreated with 1-MCP but were exposed to ethylene.Fumigating Phalaenopsis with ethylene during this period, larger variation was found within one treatment: The individual plant responded differently to ethylene depending on its physiological condition.We suggest the use of 1-MCP as a standard procedure before potted blooming Phalaenopsis are shipped.