Evaluation of Relation between Carbohydrate with Development and Senescence in Lilium LA Hybrid cv. " CebDazzle"

Lilium flowers vase life are associated by different factors which influence life quality of plant. Sugars are generally used to extend the vase life of the most cut flowers. Such beneficial effects have been associated with an improvement of water relations and an increase in available energy for respiration by floral tissues. In order to determine the importance of carbohydrate distribution in regulation of development and senescence، the role of sucrose was characterized based on completely randomized design in lilium LA hybrid «Ceb Dazzle» flowers. Postharvest flower longevity after anthesis of detached buds was well correlated with total carbohydrate content of the tepals at harvest time. Longevity of attached flowers remained constant within the inflorescence، likely due to postharvest redistribution of tepal carbohydrate. By increasing the buds growth، starch amount was increased. Buds with 80 mm length had the most amount of starch. In development time of buds، changes trend in sucrose، glucose، and fructose level was the same، approximately. The nearly identical amounts of fructose and glucose within lily tepals suggest that sucrose is probably converted by invertase، rapidly. It seems that reduced sugars supply a large proportion of the carbohydrate pool in the tepals. The flower buds are active metabolic centers، since the translocation sugar is probably sucrose. However، sugar application in the vase solution induced more development of leaf yellowing when compared to those in a sugarless solution and higher concentrations of sucrose caused leaf blackening.