1-Methylcyclopropene (1-MCP) pretreatment prevents bud and flower abscission in Mokara orchids
R. Nur Azlin, M. Pauziah, W.H. Wan Mohd Reza Ikhwan, M.T. Mohd Kamal, M. Norhayati, M.Z. Zaipun, S.L. Tham, M.A. Ibrahim
Abstracts of 7th International Postharvest Symposium 2012 (IPS2012). 25-29 June, 2012. Putra World Trade Centre (PWTC), Kuala Lumpur, Malaysia. 238 pages.
2012
บทคัดย่อ
Mokara 'Oriental Red' and 'Chao Praya Pink' cut orchids were treated for 6 h at 25°C with or without 1-MCP. Treated cut orchids were exposed to 800 ppm of 1-methylcyclopropane (1-MCP). Then all the samples were exposed to 1 ppm ethylene for 16 h and placed in sugar solution at 25 °C to follow abscission. It was observed that, in Mokara 'Oriental Red' cut orchids, 20-80% of the floral buds and 0-20% of the open flowers abscised within 1 week. However, in treated sample, the 1-MCP pretreatment largely prevented this abscission during vase life with all floral buds and all open flowers maintained in first week and abscised within the 2 weeks of treatment. In Mokara 'Chao Praya pink', the 1-MCP pretreatments also extended the vase life by prolonging their vase life from 14 days in control to 21 days in treated samples. Result also showed that 1-MCP treatment inhibited ethylene production of the cut flowers by lowering both ACC oxidase activity and ethylene concentration. In conclusion, cut orchids of Mokara 'Oriental Red' and Mokara 'Chao Praya Pink' had good response to 1-MCP pretreatment.