ISHS Acta Horticulturae 673: IX International Symposium on Flower Bulbs
EFFECTS OF GIBBERELLIC ACID ON THE VASE LIFE OF CUT PATUMMA (CURCUMA ALISMATIFOLIA GAGNEP.) 'CHAING MAI' FLOWERS |
| Authors: | T. Kjonboon, S. Kanlayanarat |
| Keywords: | patumma, Curcuma alismatifolia Gagnep., gibberellic acid, postharvest physiology, vase life |
| Abstract:
Cutflowers of Patumma (Curcuma alismatifolia Gagnep.) ‘Chaing Mai’ were held in 50-200 ppm gibberellic acid (GA3) or distilled water (control) at 25°C with 75-80% relative humidity. GA3 at 100 ppm increased vase life by four days compared to the control (10 days). Increasing the concentration to 150-200 ppm did not correspondingly extend vase life despite improvement in weight retention, absorption capacity and water conductivity of stem tissues. The vase life of the flower held in 150-200 ppm GA3 was similar to that with 100 ppm GA3. GA3 did not generally affect respiration rate but significantly reduced ethylene production. At lower concentration of 50 ppm GA3, responses of the flowers were comparable to the control. | |
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