An experiment was carried out to elucidate the role of thidiazuron (TDZ), 6-benzylamino purine (BAP), and kinetin on the vase life of Gladiolus grandiflora cut flower. Harvested flowers were treated with BAP, kinetin, and TDZ of various concentrations, viz., 100 µM, 0.5 mM, and 1 mM. Our findings revealed that there was a significant increase in flower longevity in treatment with BAP, kinetin, and TDZ as compared to untreated flowers. Vase solutions which contain BAP (0.5 mM), kinetin (1 mM), and TDZ (100 µM) were most effective in improving vase life (14, 13, and 15 days, respectively) of cut Gladiolus floral spike. Flower vase life was extended with increase in fresh weight, vase solution uptake, high membrane integrity, besides reduced pH of vase solution, malondialdehyde content, and lipoxygenase activity in the flowers. However, TDZ outpaced BAP and kinetin in improving the vase life of G. grandiflora.
Key words: Gladiolus grandiflora, lipid peroxidation, lipoxygenase, membrane stability index, Senescence, vase life
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