The Responses of Oncidium Cut Flowers to Ethylene and 1-MCP

文心蘭切花、花苞與花朵對乙烯之反應

黃肇家(Chao-Chia Huang) ； Robert E. Paull

《台灣農業研究》 58卷1期 (2009/03) Pp. 1-6

https://doi.org/10.6156/JTAR/2009.05801.01

摘要

本研究探討“南西”文心蘭(Oncidium 'Gower Ramsey')切花之花苞與花朵之乙烯生成，以及對乙烯與乙烯抑制劑甲基環丙烯(1-methylcyclopropene, 1-MCP)之反應。文心蘭小花苞產生少量的乙烯（約爲0.12 nL g^(-1) h^(-1)），隨著花苞長大到開張爲花朵，乙烯之生成量漸漸降低，到測不出來的程度。花朵開始老化時，乙烯生成量又增加，在花半衰老時，乙烯生成達到高峰（約爲1.5 nL g^(-1)h^(-1)）。花朵於開始顯現老化症狀之後，乙烯之生成才開始增加。花苞比花朵對乙烯更爲敏感，在外加乙烯0.03 nL mL^(-1)環境下，花苞5d會產生老化症狀，而花朵要7d才產生老化症狀。1-MCP可以有效的延長外加乙烯處理或未經外加乙烯處理之文心蘭切花之瓶插壽命，如果1-MCP在處理後7d再處理1次，可以進一步延緩切花之老化。1-MCP使用劑量降爲0.125 gm^(-3)，亦即商業推薦量的1/4量，仍然可以有效的延長切花壽命。1-MCP也可以有效的恢復經乙烯處理之花苞之開張能力。1-MCP處理時間由2h增至12h，處理溫度由10℃至28℃，結果都一樣有效，顯示1-MCP處理是延長文心蘭切花壽命有效的方法。

關鍵字

文心蘭切花 ； 乙烯 ； 甲基環丙烯 ； 溫度 ； 劑量

並列摘要

The ethylene production by Oncidium 'Gower Ramsey' buds and florets and response to 1-methylcyclopropene (1-MCP) were investigated. Small flower buds produced little ethylene (0.12 nL g^(-1) hr^(-1)) and the production declined to being undetectable as the bud grew and became a floret. Ethylene production increased again as the floret began to senesce. A peak of ethylene production occurred (1.5 nL g^(-1) hr^(-1)) at the half senescent floret stage. The rises in ethylene production occurred after the start of floret senescence. Floret buds were more sensitive to exogenous ethylene than the floret, as it took 5 versus 7 days for senescence symptoms to appear at 0.03 nL mL^(-1) exogenous ethylene. The ethylene inhibitor, 1-MCP was effective in prolonging the vase life of both ethylene-treated and non-ethylene-treated cut sprays. When 1-MCP was applied again after 7 days to the same sprays, senescence symptom development was further delayed. Concentration of 1-MCP as low as 235 nL m^(-3) which was one fourth of the concentration recommended for commercial use extended vase life. Bud opening also increased following 1-MCP treatment in ethylene-treated sprays. No difference in response to 1-MCP treatment was found when the treatment was varied from 2 to 12 h and from 10℃ to 28℃. A treatment with 1-MCP was a useful tool to extend vase life of Oncidium cut flower sprays.

並列關鍵字

Oncidium cut flower ； Ethylene ； 1-MCP ； Temperature ； Concentration