一种一年生植物在本地和异国范围扩张期间的植物土壤相互作用
Nicky Lustenhouwer1,2, Tom M R Chaubet3, Miranda K Melen2
1School of Biological Sciences, University of Aberdeen, Aberdeen, United Kingdom.
Journal of evolutionary biology
|March 27, 2024
概括
植物范围的扩大会影响土壤生物群,但局部适应并不能解释多样化的植物-土壤反. 这些相互作用的演变是由局部动态驱动的,而不是广泛的生物地理变化.
科学领域:
- 生态生态学 生态生态学
- 进化生物学 进化生物学
- 植物与土壤的相互作用
背景情况:
- 范围的扩大,包括生物入侵和气候变化,显著改变了植物与土壤的相互作用.
- 进入新范围的植物遇到新的土壤生物群,可能导致多样化和时间依赖的土壤反效应.
- 当地适应土壤病原体和互惠主义者是解释这些观察到的反模式的关键假设.
研究的目的:
- 调查当地适应在扩大范围期间塑造植物-土壤反中的作用.
- 测试这样的假设,即植物在对新型土壤生物群的反应中进化,在本土和异国情调的范围.
- 为了比较Dittrichia graveolens的植物-土壤反和进化差异化,它在本土的欧洲和入侵的加利福尼亚地区分布.
主要方法:
- 温室实验是使用欧洲和加利福尼亚五个核心和边缘地点的基因型和土壤进行的.
- 通过比较Dittrichia graveolens在同类土壤中的生长与对照土壤中的生长来测量植物-土壤反.
- 对整个范围的基因型变异进行了评估,以检测局部进化差异化的证据.
主要成果:
- 植物与土壤的相互作用在本地和异国范围均表现出奇特的反应.
- 平均而言,与入侵性加利福尼亚范围相比,本土欧洲范围的植物-土壤反更为积极.
- 尽管土壤反应异质,但从两个范围的核心和边缘的植物基因型之间没有发现进化差异的证据.
结论:
- 范围扩张期间植物土壤相互作用的演变可能更多地受到局部进化过程的影响,而不是大规模的生物地理变化.
- 观察到的植物-土壤反模式不仅仅是通过局部适应新土壤生物群来解释的.
- 未来的研究应该专注于细微的局部进化动态,这些动态在不断扩大的种群中塑造了植物与土壤的相互作用.
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