ROSE FLOWER LONGEVITY IN RESPONSE TO ETHYLENE AND 1-METHYLCYCLOPROPENE (1-MCP)

The objectives of this work were to determine the ethylene sensibility of seven cut rose cultivars and also the best 1-MCP concentration and treatment period on their postharvest quality.
The cultivars Grand Gala^®, Versilia, Texas, Konfetti^™, Tineke, Sandra and Vega, were exposed to 0, 1, 10, 100 or 1000 µl L^-1 ethylene concentrations during a 12 h period. ‘Grand Gala^®’ exhibited the highest ethylene sensitivity by decreasing its postharvest flower longevity, and ‘Konfetti^™’ the most resistant cultivar to the ethylene effects.
In order to evaluate the effects of 1-MCP, ‘Grand Gala^®’ and ‘Konfetti^™’ were exposed to 0, 0.1, 0.5, 1.0 or 1.5 g m^-3 of Ethylbloc^® during 3, 6 and 12 hour periods.
The treatment 1.5 g m^-3 of Ethylbloc^® during 3 h increased the ‘Grand Gala^®’ flower longevity to 7.2 days.
At that concentration, the flower exhibited several opened petals and estimated maximum leaf longevity of 5.1 days.
At that same treatment ‘Konfetti^™’ exhibited flower and leaf longevity of 12.1 and 10.8 days, respectively. ‘Konfetti^™’ flowers completely opened at the treatment 1.5 g m^-3 of Ethylbloc^® during 12 h.

IX International Symposium on Postharvest Quality of Ornamental Plants

R.J. da Rocha Batista, J.A.S. Grossi, J.I. Ribeiro Junior, J.G. Barbosa, F.L. Finger

Rosa, cut flower, postharvest

https://doi.org/10.17660/ActaHortic.2009.847.50