บทคัดย่องานวิจัย

หมวดหมู่ : ฐานข้อมูลงานวิจัย

Low temperatures and girdling extend vase life of Sylvia Proteas.

Stephens, I.A., Holcroft, D.M., and Jacobs, G.

ISHS Acta Horticulturae 545: 205-214.

2001

บทคัดย่อ

Low temperatures and girdling extend vase life of 'Sylvia' Proteas.

Flower-bearing stems of Protea cv. Sylvia (P. eximia x P. susannae) were placed in sealed containers ventilated continuously with air at 0, 4.5, 7 and 10 deg C for three days. A second trial used girdled and non-girdled flower-bearing stems placed in boxes held at 0 and 4.5 deg C for 3, 7, 14 and 21 days. Respiration rates were determined after 12, 24, 48 and 72 hours. Leaf blackening and flowerhead quality were used to evaluate post-storage vase life. Phenolic concentration was determined at harvest and on removal from storage. Respiration and leaf blackening correlated well with temperature, and decreased significantly with decreasing temperature. Appearance of leaf blackening was delayed by 4 days (P<0.001) in stems held at 0 deg C. Phenolic concentration was significantly greater in subtending flush leaves than leaves from other flushes. Vase life correlated well with girdling and temperature. Flower-bearing stems held at 0 deg C had a significantly longer vase life than those held at 4.5 de g C. Girdled flower-bearing stems had a significantly longer vase life than intact flower-bearing stems. Girdled flower-bearing stems held at 0 deg C for 3 days had a subsequent vase life of 9 days while those held for 3 weeks had a vase life of 6 days. The vase life of girdled flower-bearing stems held at 4.5 deg C for 3 days had a vase life of 8 days, while after 2 weeks storage at 4.5 deg C vase life was less than or equal to 1 day. Maintenance of low temperature storage (0 deg C) during transit and girdling are recommended to prolong vase life of Sylvia cut flowers.