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首页> 外文期刊>Journal of environmental science and health >Lichen microalgae are sensitive to environmental concentrations of atrazine
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Lichen microalgae are sensitive to environmental concentrations of atrazine

机译：地衣微藻对environmental去津的环境浓度敏感

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The identification of new organisms for environmental toxicology bioassays is currently a priority, since these tools are strongly limited by the ecological relevance of taxa used to study global change. Lichens are sensitive bioindicators of air quality and their microalgae are an untapped source for new low-cost miniaturized bioassays with ecological importance. In order to increase the availability of a wider range of taxa for bioassays, the sensitivity of two symbiotic lichen microalgae, Asterochloris erici and Trebouxia sp. TR9, to atrazine was evaluated. To achieve this goal, axenic cultures of these phycobionts in suspension were exposed to a range of environmental concentrations of the herbicide atrazine, a common water pollutant. Optical density and chlorophyll autofluorescence were used as endpoints of ecotoxicity and ecophysiology on cell suspensions. Results show that lichen microalgae show high sensitivity to very low doses of atrazine, being higher in Asterochloris erici than in Trebouxia sp. TR9. We conclude that environmental concentrations of atrazine could modify population dynamics probably through a shift in reproduction strategies of these organisms. This seminal work is a breakthrough in the use of lichen microalgae in the assessment of micropollution effects on biodiversity.
机译：目前，确定用于环境毒理学生物测定的新生物是当务之急，因为这些工具受到用于研究全球变化的生物分类的生态相关性的强烈限制。地衣是空气质量的敏感生物指标，其微藻类是具有生态重要性的新型低成本小型生物测定的未开发来源。为了增加用于生物测定的更广泛的分类单元的可用性，两种共生的地衣微藻（Asterochloris erici和Trebouxia sp。）的敏感性。评估阿特拉津的TR9。为了实现这一目标，将悬浮的这些藻生物的轴突培养物暴露于一系列环境浓度的除草剂water去津（一种常见的水污染物）中。光密度和叶绿素自发荧光被用作细胞悬浮液的生态毒性和生态生理学的终点。结果表明，地衣微藻对极低剂量的阿特拉津显示出高度敏感性，而在紫草菊中比在Trebouxia sp。中更高。 TR9。我们得出结论，environmental去津的环境浓度可能会通过改变这些生物的繁殖策略来改变种群动态。这项开创性的工作是在利用地衣微藻评估对生物多样性的微污染影响方面的一项突破。

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