ABSTRACT: The objective of this study was to determine the effect of 1-methylcyclopropene (1-MCP) on vase life of rose cv. Osiana in different storage conditions and in the presence of exogenous ethylene. The roses were treated with 0.5; 1.0; 1.5 and 2.0 g m-3 of Ethylbloc, and submitted to the following conditions: Storage at 5 °C with stems in water; Storage at 22 °C with stems in water; Storage at 5 °C in ‘Strong’ type paper for 3 days and subsequent storage at 22 °C. The best storage condition was at 22 °C with the stems in the water. Doses greater than 1.0 g m-3 of Ethylbloc prolonged vase life. In this condition, the stems were treated with 1.0 g m-³ Ethylbloc; 1.0 g m-3 Ethylbloc + 10 μL L-1 ethylene and 10 μL L-1 ethylene for 24 h. The Ethylblocincreased vase life even in the presence of ethylene and fresh mass on the first two days. It reduced ethylene production by flowers in the first 24 h, and respiratory activity after 36 h. It can be concluded that the concentration of 1.0 g m-3 of Ethylblocprolongs the vase life of cv. Osiana stored at room temperature with the stems in water even in the presence of exogenous ethylene.
Key words: ethylene; inhibitors; post-harvest; respiration; rose × hybrida
RESUMO: Objetivou-se com este estudo determinar o efeito do 1-metilciclopropeno (1-MCP) na vida de vaso da rosa cv. Osiana em diferentes condições de armazenamento e na presença de etileno exógeno. As rosas foram tratadas com 0,5; 1,0; 1,5 e 2,0 g m-3 de Ethylbloc e submetidas às condições: Armazenamento a 5 °C com as hastes na água; Armazenamento a 22 °C com as hastes na água; Armazenamento a 5 °C em papel tipo ‘Strong’ por 3 dias e posterior armazenamento a 22 °C. A melhor condição de armazenamento foi a 22 °C com as hastes na água. As dosagens acima de 1,0 g m-3 de Ethylblocprolongou a vida de vaso. Nesta condição, as hastes foram tratadas com 1.0 g m-1 Ethylbloc; 1.0 g m-3 Ethylbloc + 10 μL L-1etileno e 10 μL L-1 etileno por 24 h. O Ethylbloc aumentou a vida de vaso mesmo na presença de etileno, aumentando a massa fresca nos primeiros dois dias, reduzindo a produção de etileno pelas flores nas primeiras 24 h e a atividade respiratória a partir das 36 h. Conclui-se que a concentração de 1,0 g m-3 de Ethylbloc prolonga a vida de vaso das rosas cv. Osiana armazenadas a temperatura ambiente com as hastes em água mesmo na presença de etileno exógeno.
Palavras-chave: etileno; inibidores; pós-colheita; respiração; rosa x hibrida
ROSA PÓS-COLHEITA ARMAZENAMENTO ETILENO TEMPERATURA CONSERVAÇÃO