Department of Horticulture, Division of Applied Life Science (BK21 Four Program), Graduate School of Gyeongsang National University, Jinju 52828, Korea.
Institute of Agriculture and Life Science, Gyeongsang National University, Jinju 52828, Korea.
Int J Mol Sci. 2022 Oct 30;23(21):13211. doi: 10.3390/ijms232113211.
As a commercial high-grade cut flower, the marketability of herbaceous peony ( Pall.) is limited by its short vase life in water. Si (silicon) is an alternative to improve the postharvest life of cut flowers. However, the effects of the combined application of Si and preservatives on the postharvest performance of cut peony flowers are unknown. In this study, the effects of a Si application and a preservative alone and collegial on the longevity of the vase life, water loss, antioxidant defense system, and stock carbohydrates level of cut flowers of three peony cultivars were investigated. It was observed that Si effectively prolonged the vase life, while the preservative alone, to a lesser extent, but markedly induced an early flowering and a greater flower diameter (flower open degree). The simultaneous use of Si and the preservatives not only showed larger flowers, but also improved the postharvest performance as characterized by an extended vase life and delayed the water loss. In addition, the Si supplementation dramatically intensified the antioxidant defense system (ameliorated antioxidant enzymes and alleviated ROS accumulation) in petals but did not increase the stock carbohydrates (starch and soluble sugars) levels, as compared to the treatment with the preservative alone. We show that a Si supplementation to a preservative is highly recommended for a large-scale use to promote the postharvest performance and competitiveness of marketed cut flowers.
作为一种商业高档切花，芍药（Pall.）的市场可销性受到其在水中瓶插寿命短的限制。硅（Si）是一种提高切花采后寿命的替代物。然而，Si 与保鲜剂联合应用对切花芍药的采后性能的影响尚不清楚。本研究探讨了单独施用 Si 和保鲜剂以及两者联合处理对 3 个芍药品种切花瓶插寿命、水分损失、抗氧化防御系统和花枝碳水化合物水平的影响。结果表明，Si 能有效延长瓶插寿命，而保鲜剂单独处理在一定程度上能促进芍药提前开花和增大花朵直径（花朵开度）。同时使用 Si 和保鲜剂不仅能使花朵更大，而且能改善切花的采后性能，表现为瓶插寿命延长和水分损失延迟。此外，与单独使用保鲜剂相比，Si 处理能显著增强花瓣的抗氧化防御系统（改善抗氧化酶活性并减轻 ROS 积累），但不会增加花枝中的贮藏碳水化合物（淀粉和可溶性糖）水平。本研究表明，将 Si 补充剂添加到保鲜剂中可在大规模应用中促进切花的采后性能和竞争力。
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