缺水改变了花信号和花蜜奖励的选择模式,在普通的早晨荣耀中得到奖励
Yedra García1, Benjamin S Dow1, Amy L Parachnowitsch1
1Department of Biology, University of New Brunswick, 10 Bailey Dr, Fredericton, NB E3B 5A3, Canada.
AoB PLANTS
|October 30, 2023
概括
资源的限制影响着植物的进化. 缺水,与授粉者限制不同,显著改变了花的特征和选择,有利于更大的花和更少的花蜜,这表明由于非生物因素的进化速度更快.
科学领域:
- 生态生态学 生态生态学
- 进化生物学 进化生物学
- 植物科学 植物科学
背景情况:
- 气候变化通过减少诸如授粉者和水等资源影响了植物与授粉者之间的相互作用.
- 很少有研究研究了这些资源限制的单独和综合影响,特别是水资源短缺,对花特征的进化.
研究的目的:
- 研究如何实验性减少授粉者访问和水的可用性影响花信号,花蜜奖励,和表型选择在这些特征在紫色.
- 为了比较缺水与授粉者限制对花特征演化的影响.
主要方法:
- 一个常见的花园实验 *Ipomoea purpurea* 使用三种治疗方法进行:授粉者限制,减少水分和未经操纵的控制.
- 受到授粉者限制和控制的植物得到了良好的灌,而减少水分的组经历了干旱条件.
主要成果:
- 与对照组相比,缺水显著改变了花信号和花奖励,在选择方向和强度上有所不同.
- 在缺水条件下的选择有利于较低的花蜜量和更大的花朵大小,可能会影响授粉者访问.
- 得到良好灌的植物 (控制和授粉者限制) 显示出选择增加的花蜜量,这表明非授粉者介导的选择.
结论:
- 诸如水的可用性等非生物因素,可以成为花特征的重要选择因子,可能会比授粉者减少更快地推动进化.
- 对生物和非生物资源的实验操纵对于了解授粉系统在不断变化的气候条件下如何演变至关重要.
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