The mediating role of water relations on vase life response to prior desiccation (dry handling) was addressed in cut chrysanthemum. In the first part of the study, the contribution of different organs to whole-cut flower transpiration was determined in 12 cultivars. During desiccation, leaf transpiration decreased owing to stomatal closure. Instead, no active regulation was apparent in either stem or flower. Cultivar differences in leaf transpiration were related to the weight loss required to induce stomatal closure (R² = 0.919). A small portion of cut flower transpiration was through the flower (12.3 ± 0.3 %), with the major contributor being either leaves or stem, depending on the water status and the cultivar. Leaf transpiration was positively correlated with whole-cut flower transpiration (R² = 0.879). In the second part of the study, the postharvest longevity upon arrival and following desiccation (5 or 10 % weight loss) was determined on six cultivars with contrasting whole-cut flower transpiration rates. In these cultivars, the rehydration ability following a dehydration event, petal carbohydrate and soluble protein contents, as well as leaf carbohydrate, soluble protein and mineral contents were also assessed. Impaired water transport, as a result of prior desiccation, was not associated with the vase life response to dry handling. A strong correlation between whole-cut flower transpiration in the desiccation experiment and the vase life response to prior desiccation was found. Low vase life decrease in response to prior desiccation was associated with decreased whole-cut flower transpiration during the postharvest period. In conclusion, cultivar differences in vase life response to prior desiccation were attributed to variation in leaf stomatal characteristics.

在切花菊花中解决了水关系对先前干燥（干处理）的花瓶寿命反应的中介作用。在研究的第一部分，确定了 12 个品种的不同器官对全切花蒸腾作用的贡献。在干燥过程中，由于气孔关闭，叶片蒸腾作用减少。相反，在茎或花中没有明显的主动调节。叶片蒸腾作用的品种差异与诱导气孔关闭所需的重量损失有关 (R ²  = 0.919)。切花蒸腾作用的一小部分是通过花 (12.3 ± 0.3 %)，主要贡献者是叶子或茎，这取决于水分状况和品种。叶片蒸腾作用与全切花蒸腾作用呈正相关（R ² = 0.879）。在研究的第二部分，测定了六个栽培品种在到达时和干燥后（5% 或 10% 重量损失）的采后寿命，其全切花蒸腾速率形成对比。在这些栽培品种中，还评估了脱水事件后的再水化能力、花瓣碳水化合物和可溶性蛋白质含量，以及叶片碳水化合物、可溶性蛋白质和矿物质含量。由于先前干燥而导致的水运输受损与花瓶寿命对干燥处理的反应无关。发现干燥实验中的全切花蒸腾作用与花瓶寿命对先前干燥的反应之间存在很强的相关性。先前干燥导致的花瓶寿命降低与收获后全切花蒸腾作用减少有关。