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首页> 美国卫生研究院文献>Microorganisms >Root Bacteria Recruited by Phragmites australis in Constructed Wetlands Have the Potential to Enhance Azo-Dye Phytodepuration
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Root Bacteria Recruited by Phragmites australis in Constructed Wetlands Have the Potential to Enhance Azo-Dye Phytodepuration

机译：在人工湿地中由芦苇招募的根细菌具有增强偶氮染料植物净化作用的潜力

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The microbiome associated with plants used in phytodepuration systems can boost plant growth and services, especially in ecosystems dealing with recalcitrant compounds, hardly removed via traditional wastewater (WW) treatments, such as azo-dyes used in textile industry. In this context, we aimed to study the cultivable microbiome selected by plants in a Constructed Wetland (CW) in Morocco, in order to obtain candidate inoculants for the phytodepuration of azo-dye contaminated WW. A collection of 152 rhizospheric and endophytic bacteria was established. The strains were phylogenetically identified and characterized for traits of interest in the phytodepuration context. All strains showed Plant Growth Promotion potential in vitro and 67% of them significantly improved the growth of a model plant in vivo compared to the non bacterized control plants. Moreover, most of the isolates were able to grow in presence of several model micropollutants typically found in WW, indicating their potential use in phytodepuration of a wide spectrum of effluents. The six most promising strains of the collection were tested in CW microcosms alone or as consortium: the consortium and two single inocula demonstrated to significantly increase the removal of the model azo-dye Reactive Black 5 compared to the non bacterized controls.
机译：与植物净化系统中使用的植物相关的微生物组可以促进植物的生长和服务，特别是在处理难降解化合物的生态系统中，这种污染物很难通过传统废水（WW）处理（如纺织工业中使用的偶氮染料）去除。在这种情况下，我们旨在研究摩洛哥人工湿地（CW）中植物选择的可培养微生物组，以获得用于对被偶氮染料污染的WW进行植物净化的候选接种剂。建立了152种根际和内生细菌的集合。对这些菌株进行了系统发育鉴定，并在植物纯化的背景下对其感兴趣的特征进行了表征。所有菌株在体外均显示出促进植物生长的潜力，其中67％的菌株与非细菌对照植物相比，显着改善了模型植物的体内生长。而且，大多数分离物能够在典型地在WW中发现的几种模型微污染物的存在下生长，这表明它们在植物净化多种废水中的潜在用途。单独或作为财团在CW微观世界中测试了该集合中的六个最有希望的菌株：财团和两个单一接种物证明与非细菌对照组相比，显着提高了模型偶氮染料活性黑5的去除率。

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