新兴的大型植物对氨氧化细菌和古菌具有选择性作用。
Emergent macrophytes act selectively on ammonia-oxidizing bacteria and archaea.
机构信息
Molecular Microbial Ecology Group, Institute of Aquatic Ecology, University of Girona, Girona, Spain.
出版信息
Appl Environ Microbiol. 2012 Sep;78(17):6352-6. doi: 10.1128/AEM.00919-12. Epub 2012 Jun 15.
Abstract
Ammonia-oxidizing bacteria (AOB) and archaea (AOA) were quantified in the sediments and roots of dominant macrophytes in eight neutral to alkaline coastal wetlands. The AOA dominated in most samples, but the bacterial-to-archaeal amoA gene ratios increased with increasing ammonium levels and pH in the sediments. For all plant species, the ratios increased on the root surface relative to the adjacent bulk sediment. This suggests that root surfaces in these environments provide conditions favoring enrichment of AOB.
摘要
在八个中性到碱性沿海湿地的优势大型植物的沉积物和根部中，定量了氨氧化细菌（AOB）和古菌（AOA）。大多数样品中 AOA 占主导地位，但随着沉积物中铵水平和 pH 值的升高，细菌与古菌 amoA 基因的比值增加。对于所有植物物种，相对于相邻的体相沉积物，根表面的比值增加。这表明这些环境中的根表面提供了有利于 AOB 富集的条件。
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