José Geraldo Barbosa

Longevidade de inflorescências de Epidendrum ibaguense tratadas com aminoetoxivinilglicina

Abstract – This work evaluated the influenceof the aminoethoxyvinylglycine (AVG), an inhibitor of ethylene synthesis, when applied in pulsing solution or sprayed, on the abscission and longevity of cut star orchid ( Epidendrum ibaguense Kunth) inflorescences.The cut stems were placed in solutions with 0, 0.5, 1, 1.5 and 2 mM AVG concentrations immediately after the harvest for periods of 6, 12, 18 and 24 hours. The same treatment concentrations were sprayed on the inflorescencesuntil runoff. The experiment had a randomized complete block design with factorial treatments of rate and duration plus rate of application to the flowers, with fivereplicates, with three stems per experimental unit. Regardless of the way the AVG was applied, the inhibitor extended the flowers’ longevity in approximately 70% compared to the control treatment, reaching maximum effect at 1.5 and 2 mM AVG. The percentage of abscissed flowersdiminished in all treatments containing AVG, with higher efficiencywhen sprayed over the inflorescence,decreasing the abscission by 80% at concentrations between 1 and 2 mM AVG.Index terms: AVG, pulsing, spraying.