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首页> 外文期刊>Applied Microbiology and Biotechnology >Difference of nitrogen-cycling microbes between shallow bay and deep-sea sediments in the South China Sea
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Difference of nitrogen-cycling microbes between shallow bay and deep-sea sediments in the South China Sea

机译：南海浅滩和深海沉积物氮循环微生物的差异

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摘要

In marine sediments, microorganisms are known to play important roles in nitrogen cycling; however, the composition and quantity of microbes taking part in each process of nitrogen cycling are currently unclear. In this study, two different types of marine sediment samples (shallow bay and deep-sea sediments) in the South China Sea (SCS) were selected to investigate the microbial community involved in nitrogen cycling. The abundance and composition of prokaryotes and seven key functional genes involved in five processes of the nitrogen cycle [nitrogen fixation, nitrification, denitrification, dissimilatory nitrate reduction to ammonium (DNRA), and anaerobic ammonia oxidation (anammox)] were presented. The results showed that a higher abundance of denitrifiers was detected in shallow bay sediments, while a higher abundance of microbes involved in ammonia oxidation, anammox, and DNRA was found in the deep-sea sediments. Moreover, phylogenetic differentiation of bacterial amoA, nirS, nosZ, and nrfA sequences between the two types of sediments was also presented, suggesting environmental selection of microbes with the same geochemical functions but varying physiological properties.
机译：在海洋沉积物中，已知微生物在氮循环中起重要作用;然而，目前尚不清楚参与每个氮循环过程中的微生物的组成和量。在这项研究中，选择了两种不同类型的海洋沉积物样本（SCS）中的海洋沉积物样本（浅海湾和深海沉积物），以研究参与氮循环的微生物群落。提出了氮素周期五个方法[氮固定，硝化，脱氮，硝酸铵（DNRO）和厌氧氨氧化（厌氧氧化氮氧化（厌氧氧化）的七种方法的原核生物和七个关键官能基因的丰富和组成。结果表明，在浅海湾沉积物中检测到较高丰富的脱氮剂，而在深海沉积物中发现了涉及氨氧化，厌氧和DNRA的更高丰富的微生物。此外，还介绍了两种沉积物之间的细菌氨基，NIR，NOSZ和NRFA序列的系统发育分化，表明具有相同地球化学功能的微生物的环境选择，但生理特性不同。

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