1-MCP pretreatment prevents bud and flower abscission in Dendrobium orchids |
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| Institution: | 1. Department of Horticulture, Faculty of Agriculture, Kasetsart University, Bangkok 10900, Thailand;2. Wageningen University and Research Centre, P.O. Box 17, 6700 AA Wageningen, The Netherlands;1. Department of Horticulture, Faculty of Agriculture, Kasetsart University, Bangkok 10900, Thailand;2. Department of Horticulture, Faculty of Agriculture at Kamphaeng Saen, Kasetsart University, Kamphaeng Saen Campus, Nakhon Pathom 73140, Thailand;3. Academy of Science, The Royal Society of Thailand, Dusit, Bangkok 10300, Thailand;4. Mann Laboratory, Department of Plant Sciences, University of California, Davis, CA 95616, USA;1. Department of Horticulture, Faculty of Agriculture, Kasetsart University, Bangkok 10900, Thailand;2. Postharvest Technology Innovation Center, Commission on Higher Education, Bangkok 10400, Thailand;3. Academy of Science, The Royal Institute, Dusit, Bangkok 10300, Thailand;4. Mann Laboratory, Department of Plant Sciences, University of California, Davis, CA 95616, USA;1. Center for Agricultural Biotechnology, Kasetsart University, Kamphaeng Saen Campus, Nakhon Pathom 73140, Thailand;2. Center of Excellence on Agricultural Biotechnology (AG-BIO/PERDO-CHE), Bangkok 10900, Thailand;3. National Center for Genetic Engineering and Biotechnology (BIOTEC), National Science and Technology Development Agency (NSTDA), 113 Thailand Science Park, Thanon Phahonyothin, Tambon Khlong Nueng, Amphoe Khlong Luang, Pathum Thani 12120, Thailand;4. Mann Laboratory, Department of Plant Sciences, University of California, Davis, CA 95616, USA;1. NARO Institute of Floricultural Science, Fujimoto, Tsukuba, Ibaraki 305-8519, Japan;2. Graduate School of Life and Environmental Science, Kyoto Prefectural University, Kyoto 606-8522, Japan;1. School of Cosmetic Science, Mae Fah Luang University, Chiang Rai, 57100, Thailand;2. Phytocosmetics and Cosmeceuticals Research Group, Mae Fah Luang University, Chiang Rai 57100, Thailand |
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| Abstract: | Dendrobium orchid inflorescences were treated for 4 h at 25 °C with or without 100–500 nl/l 1-MCP and were then placed in water at 25 °C to follow abscission. In controls, depending on the experiment, 20–80% of the floral buds and 0–20% of the open flowers abscised within 1 week. The 1-MCP pretreatment largely prevented this abscission. If flowers were exposed to 1.0 μl/l ethylene for 3 days, all floral buds and all open flowers abscised within the 3 days of treatment. 1-MCP treatment just prior to ethylene treatment largely prevented the ethylene effect. Treatment with STS was as effective as treatment with 1-MCP. Dendrobium inflorescences are usually shipped by air in cardboard boxes lined with plastic film. The stem ends are placed in plastic tubes filled with water. After shipment and placement in water, a considerable percentage of the buds, and some flowers, abscise. This is probably due to elevated ethylene concentrations inside the boxes. Treatment of the inflorescences with 100–500 nl/l 1-MCP prior to simulated air transport largely prevented abscission during vase life. 1-MCP treatment inhibited ethylene production of the inflorescences by lowering both ACC synthase in open flowers and ACC oxidase activity in floral buds. |
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