一种分布广泛的野生植物沿着的气候梯度对热应激的适应和适应性
Donam Tushabe1, Franziska Altmann1, Erik Koehler1
1Ecology and Conservation Biology, Institute of Plant Sciences University of Regensburg Regensburg Germany.
Ecology and evolution
|April 2, 2025
概括
野生Silene vulgaris种群对热浪的适应能力有限. 热应激并没有增强繁殖至关重要的结合性特征,这表明这些植物有其他生存策略.
科学领域:
- 植物生殖生物学 植物生殖生物学
- 适应气候变化 适应气候变化
- 生态生态学 生态生态学
背景情况:
- 气候变化引发的热浪通过影响体育细胞形成阶段,对种子产量和质量产生负面影响.
- 了解野生植物体细胞的热应激适应和适应是至关重要的,但不太了解.
研究的目的:
- 调查野生Silene vulgaris群体在热应激状态下的体型特征的适应和适应潜力.
- 评估慢性热应激对生殖成功 (种子数量和质量) 的影响.
主要方法:
- 共同的花园实验,以评估跨欧洲温度梯度的体型特征的适应性.
- 慢性热应激 (CHS) 治疗 (中度和严重) 适用于开花植物.
- 评估对异构体特征,卵巢和卵子大小,花粉特征以及种子产量/质量的影响.
主要成果:
- 在温度梯度中没有观察到类型内变异,这表明适应性有限.
- 雌性体球体比雄性体球体对热量敏感度低.
- 热应激减少了花粉数量和大小,以及花粉长度,对种子产量和质量产生了负面影响. 强烈的热量导致了更大的减少.
- 适应潜力与温度梯度没有变化,除了在强烈的高温下花粉大小.
结论:
- 野生Silene vulgaris种群在大多数体质特征中缺乏适应和适应热应激.
- 在严重的热应激下,花粉大小在温暖的气候群体中表现出一些适应.
- 沉默的普通人可能会采用其他策略,如生理,生化或现象学调整,以应对来自热浪的热应激.
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