Floral Mass per Area and Water Maintenance Traits Are Correlated with Floral Longevity in Paphiopedilum (Orchidaceae).
Floral Mass per Area and Water Maintenance Traits Are Correlated with Floral Longevity in Paphiopedilum (Orchidaceae).
复制标题
单位面积的花质量和保水性状与兜兰（兰科）的花寿命相关
DOI：
10.3389/fpls.2017.00501
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发表时间：
2017
影响因子：
5.6
通讯作者：
Zhang SB
中科院分区：
文献类型：
--
作者：
Zhang FP;Yang YJ;Yang QY;Zhang W;Brodribb TJ;Hao GY;Hu H;Zhang SB
花的寿命（FL）决定了授粉成功和花的维持之间的平衡。虽然较长的开花时间增强了植物吸引传粉者的能力，但如果它对整体植物健康产生负面影响，则可能是有害的。寿命较长的叶片与其单位面积干重呈正相关，这影响了叶片的构建成本和生理功能。然而，很少有人知道之间的关联FL和花单位面积干质量（FMA）和水分保持性状。我们调查了增加FL是否会产生类似的成本。我们的评估的11种兜兰（拖鞋兰花）考虑的影响FMA和花保水特性的FL。我们发现FL和FMA之间的正相关关系。花寿命与膨压损失时的渗透势和体积弹性模量呈显著相关，但与FA无显著相关性。叶和花的大小和单位面积质量均不相关，表明花和叶的经济性状是独立进化的。因此，我们的研究结果表明，FL和保持花中水分状态的能力之间存在明确的关系。这些经济上的限制也表明延长花的寿命在兜兰中可能具有很高的生理成本。
Floral longevity (FL) determines the balance between pollination success and flower maintenance. While a longer floral duration enhances the ability of plants to attract pollinators, it can be detrimental if it negatively affects overall plant fitness. Longer-lived leaves display a positive correlation with their dry mass per unit area, which influences leaf construction costs and physiological functions. However, little is known about the association among FL and floral dry mass per unit area (FMA) and water maintenance traits. We investigated whether increased FL might incur similar costs. Our assessment of 11 species of Paphiopedilum (slipper orchids) considered the impact of FMA and flower water-maintenance characteristics on FL. We found a positive relationship between FL and FMA. Floral longevity showed significant correlations with osmotic potential at the turgor loss and bulk modulus of elasticity but not with FA. Neither the size nor the mass per area was correlated between leaves and flowers, indicating that flower and leaf economic traits evolved independently. Therefore, our findings demonstrate a clear relationship between FL and the capacity to maintain water status in the flower. These economic constraints also indicate that extending the flower life span can have a high physiological cost in Paphiopedilum.