Effects of Temperature and Water Stress on Some Floral Nectar Characteristics in Ipomopsis longiflora (Polemoniaceae) under Controlled Conditions
Effects of Temperature and Water Stress on Some Floral Nectar Characteristics in Ipomopsis longiflora (Polemoniaceae) under Controlled Conditions
复制标题
控制条件下温度和水分胁迫对长花白菜（Polemoniaceae）花蜜特性的影响
作者：
Armando G. Villarreal;C. E. Freeman
在实验室实验中，将植物暴露于20 ℃、30 ℃和35 ℃的恒定白天（16小时）温度，以及20 ℃的夜间温度（8小时），并在每个温度方案下进行三种水平的水分胁迫（低、中和高）。在花蜜中的蔗糖的百分比减少了一个小的，但统计学上显着的量在最高测试温度，但不受水分胁迫的差异。花蜜糖浓度不受温度或水分胁迫的影响。花蜜量显着影响，只有水分胁迫。花的大小（花冠筒长度）受到温度和水分胁迫的影响。在任何实验中均未检测到温度和水分胁迫之间的显著相互作用。
Plants in laboratory experiments were exposed to constant day (16 h) temperatures of 20 C, 30 C, and 35 C with night temperatures of 20 C (8 h) and three levels of water stress (low, moderate, and high) at each temperature regime. The percentage of sucrose in the nectar was reduced by a small but statistically significant amount at the highest test temperature but was not affected by differences in water stress. Sugar concentration of the nectar was not affected by temperature or water stress. Nectar volume was significantly affected only by water stress. Flower size (corolla tube length) was affected by both temperature and water stress. No significant interactions between temperature and water stress were detected in any experiment.