Involvement of Ethylene in Physiological Processes Determining the Vase Life of Various Hybrids of Mokara Orchid Cut Flowers

There is limited information about the postharvest performance and physiology of Mokara orchid cut flowers, which are a special group artificially created trigenetic hybrids Vanda × Arachnis Ascocentrum. Therefore, we first characterized patterns various physiological parameters during vase life five hybrids, differ in their longevity. Then, examined effects ethephon ethylene inhibitors on these parameters, biosynthesis pathway, two selected “Moo-deang” “Dao-lai”, showed significant differences duration senescence symptoms. The results demonstrate that longevity among due to production rates, regulate flower development processes expressed bud opening floret senescence. clearly show involved regulation senescence, pretreatment with significantly improved Thus, seems be main factor determines rather than water relations parameters. This study can serve as research tool for developing effective treatments hybrids.