关键词: 月季, 切花, 纳米银, 乙烯, 花朵开放

Abstract: To study the anti-ethylene effects of nano-silver（NS）treatments on cut-flowers roses（Rosa hybrida‘Movie Star’），the cut flowering stems（25 cm long）were pre-treated for 2 h with NS（5，10 and 30 mg· L^-1）or silver thiosulfate（STS，0.5 mmol· L^-1）solution with de-ioned（DI）water as control，thereafter they were immediately placed in vases containing DI water and then exposed to 10 μL· L^-1 ethylene for 24 h. The changes in ornamental quality，vase life，flower diameter and fresh mass of cut roses during their vase period were investigated. The results showed that exogenous ethylene treatment caused quick wilting of flowers and leaves，early abscission of leaves and obvious inhibition in flower opening of cut roses，thus seriously affected their ornamental quality and shortened the vase life. NS treatments could significantly alleviated above harmful effects of exogenous ethylene on cut roses，the treatment with 30 mg· L^-1 NS was the best among all treatments，which extended the vase life by 7 d compared with the ethylene treatment. Additionally，the similar experiments using the detached flowers from cut roses（with 5 cm stem and without leaves）further certified that NS treatments could effectively alleviate the inhibition in flower opening owing to exposure to exogenous ethylene.

Key words: Rosa hybrida, cut rose, nano-silver, ethylene, flower opening