烯效唑（S-3307）对非洲菊切花保鲜的影响

Influence of S-3307 on Fresh-keeping of Cut Flowers of Gerbera jamesonii Bolus

摘要:

以非洲菊（Gerbera jamesonii Bolus）切花为材料，以保鲜基本液（BP，20gL^-1蔗糖＋200 mg L^-1柠檬酸＋150 mg L^-1 8-羟基喹啉柠檬酸盐）和添加30 mg L^-1烯效唑（S-3307）的基本液（BP＋S-3307）作对比实验，通过对切花外部形态观察和切花衰老过程中一些生理生化指标测定，探讨了S-3307对非洲菊切花的保鲜效果。结果表明，S-3307处理使切花的瓶插寿命比对照（蒸馏水）延长了4.3 d，比BP处理延长了2.3 d，而弯颈率分别仅为对照和BP处理的9.6％和28.8％。说明S-3307可增强切花的吸水能力，增加花枝的鲜重，延缓了切花花瓣中蛋白质的降解和抗氧化酶SOD和CAT活性的下降，并减少了游离脯氨酸和MDA的积累，维持膜结构的相对稳定性，从而延缓了非洲菊切花的衰老和提高了切花瓶插期间的观赏品质。

Abstract:

Cut flowers of Gerberajamesonii Bolus were kept in basal preservative solution （BP, 20 g L^-1 sucrose ＋ 200 mg L^-1 citric acid ＋ 150 mg L^-1 8-hydroxyquinoline citrate） and basal preservative in addition of 30 mg L^-1 uniconazole （S-3307）. Those kept in distilled water were used as the control. Floral appearance and several physiological and biochemical indexes were determined during the senescence process of cut flowers. The results showed that S-3307 could extend the vase life of cut flowers for 4.3 days and 2.3 days as compared to the control and BP, respectively. However, the pedicel-bending rate was only 9.8% of the control and 28.8% of BP. Further studies showed that S-3307 could increase the ability of absorption water and fresh weight, which inhibit the reduction of protein content, and superoxide dismutase and catalase activities, reduce the accumulation of proline and malondialdehyde, and maintain stability of membrane in petals of the cut flowers. S-3307 could retard the senescence of the cut flowers, and improve the decoration quality of the cut flowers during vase-holding period.