ISHS Acta Horticulturae 368: International Symposium on Postharvest Treatment of Horticultural Crops
SOME PHYSIOLOGICAL AND ULTRASTRUCTURAL CHANGES OF FREESIA CUT FLOWERS TREATED WITH SILVERTHIOSULPHATE |
| Authors: | A. Amariutei, I. Burzo, C. Craciun |
| Abstract:
Some physiological changes of cut Freesia inflorescences (Freesia hybrida cv. Oberon and Ballerina) were evaluated in distilled water at room temperature with or without STS (silverthiosulphate) treatment for 24 hours prior to placing them in distilled water. The ultrastructure of cells from freshly opened floret petal tissues was compared to that of open floret petal tissues from inflorescences of Oberon cultivar held 8 days in distilled water continuously or treated with STS, held 7 days in distilled water. Inflorescences of both cultivars treated with STS had greater values for fresh weight, water uptake, conductivity of holding water, floret opening and vase life, than those held continuously in distilled water, but smaller values for transpiration, respiration and membrane permeability measured as electrolyte leakage from inflorescences. Floret petal tissues of Oberon cultivar from STS-treated inflorescences held 7 days in distilled water displayed fewer ultrastructural changes than those observed in the petals of florets from inflorescences not treated with STS, when compared with the ultrastructure of fresh petal tissues. | |
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