在不同度下,Ambrosia artemisiifolia的种群遗传差异化和表型可塑性
Yunqi Xiong1,2, Ayub M O Oduor3,4, Caiyun Zhao1
1State Key Laboratory of Environmental Criteria and Risk Assessment, Chinese Research Academy of Environmental Sciences, Beijing, China.
概括
侵袭性Ambrosia artemisiifolia表现出快速的适应性进化和表型可塑性,使其能够在丰富下壮成长. 这些结合的机制增强了它在各种环境中的入侵性.
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:
- 侵入性植物的成功通常与快速适应性进化和表型可塑性有关.
- 这些机制在环境变化下的相互作用,如缩,仍然未被充分探索.
- 度斜线可以表明植物种群的局部适应.
研究的目的:
- 调查表型可塑性和局部适应性对Ambrosia artemisiifolia入侵成功的贡献.
- 评估不同含量如何影响这些适应策略.
- 了解这些机制在殖民各种环境中的作用.
主要方法:
- 一个常见的花园实验是使用来自中国六个种群的安布罗西亚花种子进行的.
- 植物在三种 (N) 水平 (0,5,和10g N m−2) 下生长.
- 测量了与生长,生理和繁殖有关的关键植物特征.
主要成果:
- 在植物高度,生物量和透气率等特征上观察到种群之间存在显著的遗传差异,这表明当地适应.
- 塑料对水平的反应在诸如开花时间和光合作用率等特征中很明显.
- 较高度的种群表现出较低的身高和减少的根生物质分配,无论的可用性.
结论:
- 快速适应性进化和表型可塑性都会在不同的气条件下促进Ambrosia artemisiifolia的入侵性.
- 这些机制的联合作用促进了入侵性植物对各种环境条件的殖民.
- 这项研究强调了在了解植物入侵时考虑多种进化和塑性反应的重要性.
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