...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Harmful Algae >Phenotypic plasticity and differentiation in an invasive freshwater microalga
【24h】

Phenotypic plasticity and differentiation in an invasive freshwater microalga

机译：侵入性淡水微藻的表型可塑性和分化

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

Recent studies show that both marine and limnic microalgal species often consist of several genetically distinct populations. This is also valid for the nuisance freshwater algae Gonyostomum semen, which originates from acidic, brown water swamp lakes, but can nowadays also be found in clearer lakes with close to neutral pH. We hypothesized that the observed genetic differentiation among G. semen lake populations, reported in earlier studies, is connected to adaptation to local environmental conditions. In the present study we performed controlled laboratory experiments to test whether 12 strains originating from five lakes varied in their response to five to six different pHs, light intensities and DOC concentrations. Overall, growth (0.01-0.37 day(-1)) was observed over a wide range of light intensities and pHs, demonstrating high potential for photoacclimation and extensive plasticity of individual strains. Moreover, we found similar growth rates and consistent growth optima for specific pHs by strains from the same lake, suggesting genetic differentiation of populations into distinct phenotypes. However, observed strain specific preferences did not always reflect environmental conditions in the lakes of origin and provided limited evidence for the hypothesized local adaptation. Instead, the observed phenotypic differentiation may indicate resilient effects of founder events. We suggest that the wide phenotypic plasticity in this species enables it to thrive in fluctuating and variable environments, and may play a role in its ability to colonize new habitats. (C) 2014 The Authors. Published by Elsevier B.V.
机译：最近的研究表明，海洋和临海微藻物种通常都由几个遗传上不同的种群组成。这也适用于滋生讨厌的淡水藻类Gonyostomum精液，这种精液来自酸性的棕色水沼泽湖泊，但如今也可以在pH值接近中性的更清澈的湖泊中找到。我们假设，在较早的研究中报道，观察到的G.精液湖种群之间的遗传分化与适应当地环境条件有关。在本研究中，我们进行了受控实验室实验，以测试来自五个湖泊的12株菌株对5至6个不同的pH，光强度和DOC浓度的反应是否不同。总体而言，在较宽的光照强度和pH范围内均观察到了生长（0.01-0.37天（-1）），这表明光适应和单个菌株广泛可塑性的高潜力。此外，我们发现来自同一湖的菌株在特定pH值下具有相似的增长率和一致的最佳生长，表明种群的遗传分化为不同的表型。然而，观察到的菌株特异性偏好并不总是反映出原始湖泊的环境条件，并且为假设的局部适应性提供了有限的证据。取而代之的是，观察到的表型分化可能表明创始人事件具有弹性。我们建议，该物种的广泛表型可塑性使其能够在多变的环境中蓬勃发展，并可能在其定居新栖息地的能力中发挥作用。 （C）2014作者。由Elsevier B.V.发布

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号