一氧化碳对切花月季瓶插寿命和抗氧化代谢的影响

Effects of Carbon Monoxide on Vase Life and Antioxidative Metabolism in Cut Rose Flower

研究了不同浓度（0．001、0．01和0．1μmol·L^-1）的外源一氧化碳（CO）供体高铁血红素（Hematin，H）对切花月季‘影星’的瓶插寿命和抗氧化代谢的影响。结果表明，与对照相比，c0供体在0．001～0．01μmol·L^-1范围内，随使用浓度的提高延长了切花月季的瓶插寿命，其中0．01μmol·L^-1处理效果最明显，而0．1μmol·L^-1的处理反而缩短切花月季的瓶插寿命。进一步研究发现，H0．01μmol·L^-1处理还不同程度地上调前期过氧化物酶、过氧化氢酶和超氧化物歧化酶活性，显著降低MDA含量。

Effects of exogenous carbon monoxide （CO） donor （Hematin） at O. 001, 0.01 and 0. 1 μmol·L^-1 on vase life and antioxidative metabolism in cut rose ‘Movie Star＇ flower were investigated. Com- pared with the control flowers kept in distilled water, application of CO donor hematin （0. 001 -0. O1 μmol·L^-1） resulted in the prolonged vase life of cut rose in a dose-dependent manner. Between these treatments,the effect of 0. 01 μmol·L^-1hematin （H 0. 01 ） was the most effective in extending the vase life. However, the opposite effect of 0. 1 μmol·L^-1 hematin （ H 0. 1 ） was also found. Furthermore, application of H 0. 01 apparently and differentially up-regulated the activities of peroxidase, catalase and superoxide dismutase, resuhing in the apparent decrease of MDA content during the early holding period.