บทคัดย่องานวิจัย

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The effect of different growth regulators and chemical treatments used during postharvest for preserving quality of chrysanthemums.

D'hont, K.; Langeslag, J.; Dahlhaus, B. L.;

Acta Horticulturae Year: 1991 Issue: No. 298 Pages: 211-214 Ref: 2 ref.

1991

บทคัดย่อ

The effect of different growth regulators and chemical treatments used during postharvest for preserving quality of chrysanthemums.

Chrysanthemum flower stems (cultivars Polaris and Vero) were recut and placed in solutions of 0.25 g nonylphenolpolyglycolether (detergent)/litre, 1-5 p.p.m. GA3, 150-200 p.p.m. cytokinin or 25 p.p.m. silver thiosulphate (STS) and in combinations of these treatments, for 4 or 24 h at 10-15 deg C, 60-85% RH in the dark. Transport was simulated by storing the flowers in cardboard boxes for 5 days after treatment, comprising 2 days in a cooling cell (4.5 deg ), 2 days at room temperature (18 deg ) and 1 day again in a cooling cell (4.5 deg ). After transport simulation the stems were recut and placed in vases at 20 deg day/18 deg night temperatures, 80% RH and 1000 lux for 12 h/day. Flowers were observed after 3, 5 and 7 days. Leaf wilting and yellowing were reduced in the first 3-5 days of vase life by the detergent treatment. GA3 treatments delayed leaf yellowing but resulted in flower deformations. STS and cytokinins had no effect on leaf yellowing. A combination of GA3, STS and nonylphenolpolyg lycolether delayed leaf wilting and yellowing for approx. 10 days. However, flower deformations still occurred, even with low concentrations of GA3.