Sucrose accelerates flower opening and delays senescence through a hormonal effect in cut lily flowers
Sucrose accelerates flower opening and delays senescence through a hormonal effect in cut lily flowers
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DOI：
10.1016/j.plantsci.2012.02.012
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发表时间：
2012-06-01
期刊：
影响因子：
5.2
通讯作者：
Munne-Bosch, Sergi
中科院分区：
文献类型：
--
作者：
Arrom, Laia;Munne-Bosch, Sergi
糖通常用于延长切花的瓶插寿命。这种有益的效果与水关系的改善和花组织呼吸可用能量的增加有关。在这项研究中，我们的目的是评估在何种程度上（i）内源性水平的糖在外部和内部花被片，雄蕊和雌蕊在百合花开放和衰老过程中改变;（ii）糖水平增加后，各种花组织的瓶插溶液中加入蔗糖;和（iii）蔗糖添加改变花组织的激素平衡。结果表明，在花器官中，内源葡萄糖水平在花开放过程中增加，在衰老过程中下降，而蔗糖水平在花被片和雄蕊的衰老过程中增加。蔗糖处理促进花开放，延缓衰老，但不影响花被片脱落。这种影响似乎是通过一个特定的增加，在雌蕊和葡萄糖在所有花组织中的内源性水平的蔗糖。雌蕊群和其它花组织的激素平衡发生了变化。除了雌蕊群中细胞分裂素和生长素的增加外，雄蕊群中细胞分裂素、赤霉素、脱落酸和水杨酸的水平也增加，而外花被片中脱落酸的水平降低。它的结论是，蔗糖除了瓶插解决方案发挥了影响花开放和衰老，除其他因素外，改变激素平衡的几个花组织。(C)2012爱思唯尔爱尔兰有限公司保留所有权利。
Sugars are generally used to extend the vase life of 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 this study we aimed at evaluating to what extent (i) endogenous levels of sugars in outer and inner tepals, androecium and gynoecium are altered during opening and senescence of lily flowers; (ii) sugar levels increase in various floral tissues after sucrose addition to the vase solution; and (iii) sucrose addition alters the hormonal balance of floral tissues. Results showed that endogenous glucose levels increased during flower opening and decreased during senescence in all floral organs, while sucrose levels increased in outer and inner tepals and the androecium during senescence. Sucrose treatment accelerated flower opening, and delayed senescence, but did not affect tepal abscission. Such effects appeared to be exerted through a specific increase in the endogenous levels of sucrose in the gynoecium and of glucose in all floral tissues. The hormonal balance was altered in the gynoecium as well as in other floral tissues. Aside from cytokinin and auxin increases in the gynoecium; cytokinins, gibberellins, abscisic acid and salicylic acid levels increased in the androecium, while abscisic acid decreased in outer tepals. It is concluded that sucrose addition to the vase solution exerts an effect on flower opening and senescence by, among other factors, altering the hormonal balance of several floral tissues. (C) 2012 Elsevier Ireland Ltd. All rights reserved.