title: Role of Sucrose in Gamma-irradiated Chrysanthemum Cut Flowers.
abstract: Vase solution containing 2% sucrose prevented the deterioration of chrysanthemum (Dendranthema grandiflorum Kitamura) cut flowers induced by gamma-rays at 750 Gy. Glucose, fructose, and sucrose in florets and leaves of irradiated chrysanthemums decreased more rapidly than those of unirradiated ones, when the cut chrysanthemums were held in a vase solution without sucrose. The sugar contents of florets and leaves and the respiratory rate of irradiated chrysanthemums held with sucrose remained at higher levels than those of unirradiated ones. Incorporation of (14)C from [(14)C]sucrose into CO2 was increased by irradiation. Incorporation of [α-(32)P]dTTP into trichloroacetic acid (TCA) insoluble substances in florets was increased by irradiation and by exogenous sucrose supply. These results suggest that sucrose in a vase solution was used as a respiratory substrate and facilitated the repair of radiation-induced damage, resulting in the extension of longevity of irradiated chrysanthemums.
authors.affiliation: a National Food Research Institute, Ministry of Agriculture, Forestry and Fisheries.
authors.forename: K
authors.initials: K
authors.lastname: Nakahara
authors.affiliation: a National Food Research Institute, Ministry of Agriculture, Forestry and Fisheries.
authors.forename: O K
authors.initials: OK
authors.lastname: Kikuchi
authors.affiliation: a National Food Research Institute, Ministry of Agriculture, Forestry and Fisheries.
authors.forename: S
authors.initials: S
authors.lastname: Todoriki
authors.affiliation: a National Food Research Institute, Ministry of Agriculture, Forestry and Fisheries.
authors.forename: H
authors.initials: H
authors.lastname: Hosoda
authors.affiliation: a National Food Research Institute, Ministry of Agriculture, Forestry and Fisheries.
authors.forename: T
authors.initials: T
authors.lastname: Hayashi
keywords: chrysanthemum; gamma-ray; irradiation; sucrose