发芽公差对Arthraxon hispidus的入侵潜力的影响
Michael C Beall1, Jacob N Barney1, Gregory E Welbaum1
1School of Plant and Environmental Sciences, Virginia Tech, Blacksburg, Virginia, United States of America.
PloS one
|June 4, 2024
概括
一种入侵性草,Arthraxon hispidus,在各种条件下显示出高发芽率,包括盐度和温度. 它的宽泛耐受性表明它有可能在北美进一步蔓延.
科学领域:
- 生态生态学 生态生态学
- 侵入性物种 生物学 生物学
- 植物生理学 植物生理学
背景情况:
- 阿特拉克森 (Arthraxon hispidus) 是美国东部的一个新入侵的草.
- 它的快速传播需要了解它的基础生物学.
- 人们对这种侵略性入侵者的发芽位置知之甚少.
研究的目的:
- 为了研究Arthraxon hispidus对关键环境因素的发芽反应.
- 为了确定这种侵入性草的发芽位置.
- 为了预测Arthraxon hispidus的潜在传播.
主要方法:
- 测试了来自六个大西洋中部种群的种子.
- 在不同的盐度,pH值,透潜力,温度和埋葬深度下评估了发芽.
- 记录了关键的发芽参数,如发芽率和百分比.
主要成果:
- 在最佳条件下 (23°C,黑暗) 观察到高发芽率 (95%).
- 发芽发生在一个广泛的温度范围 (8-37°C) 和pH值 (5-10).
- 记录了显著的盐度耐受性 (高达342mM NaCl) 和透潜力 (-0.83 MPa),干旱不太可能广泛限制发芽.
结论:
- 阿特拉克森 (Arthraxon hispidus) 具有广泛的非生物耐受性,有助于其建立和传播.
- 在许多地区,pH值和温度等环境因素不太可能限制它的发芽.
- 虽然随着埋葬深度的增加,浮出水面的减少,但其整体的弹性表明,在新领土上有可能进行殖民.
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