Abstract: The differences in storability of cut chrysanthemums flowers harvested at different devleopment stages were studied based on some physiological aspects. Chrysanthemum flowers were harvested at two stages (flower diameter was 4-5 cm at stage I and 7-8 cm at tage Ⅱ) and stored at 0±0.5℃ for 4 weeks. The flowers were spamled at one-week intervals to analyse the soluble sugar content and the activities of per-oxidase, catalase and Polyphenol oxidase. The result showed that the soluble sugar content at stage Ⅱ was higher when flowers were harvested and remained a higher level during storage. The activity of peroxid-ase at both stages was similar at the beginning and gradually increased throughout the storage period,while at stage I it increased more rapid-y than that at stage Ⅱ. The peak value of the curve of catalase activity at stage Ⅱ appeared later and the range of changes was narrower.The behaviour of Polyphenol oxidase activity changes were similar at both stages. It suggests that enzyme activity is one of the factors influencing the storability of the chrysanthemum cut flowers.

Key words: Cut chrysanthemum, Soluble sugar, Peroxidase, Catalase, Polyphenol oxidase

摘要： 本文从分析切花菊贮藏期间可溶性糖含量、过氧化物酶、过氧化氢酶和多酚氧化酶等酶活性变化动态,探讨不同发育程度采收的切花菊耐藏性差异。研究表明,发育程度较高的切花菊含有较高的可溶性糖。贮藏期间,其过氧化物酶活性较低,过氧化氢酶活性变幅较小,峰值出现较晚,这些可能是引起不同发育期采收切花菊耐藏性差异的原因。

关键词: 切花菊, 可溶性糖, 过氧化物酶, 过氧化氢酶, 多酚氧化酶