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首页> 外文期刊>Oceanographic Literature Review >Salinity gradients shape the nitrifier community composition in Nanliu River Estuary sediments and the ecophys-iology of comammox Nitrospira inopinata
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Salinity gradients shape the nitrifier community composition in Nanliu River Estuary sediments and the ecophys-iology of comammox Nitrospira inopinata

机译：盐度梯度塑造南列河河口沉积物的硝化界群落组成及Comammox Nitrospira的Ecophys-iology

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The recent discovery of complete ammonia oxidizers (comammox), which convert ammonia to nitrate in a single organism, revolutionized the conventional understanding that two types of nitrifying microorganisms have to be involved in the nitrification process for more than 100 years. However, how different types of nitrifiers in response to salinity change remains largely unclear. This study not only investigated nitrifier community (including ammonia-oxidizing archaea (AOA), ammonia-oxidizing bacteria (AOB), comammox and nitrite-oxidizing Nitrospira) in the Nanliu estuary to find the ecological relationship between salinity and functional communities and also studied the physiology of a typical comammox Nitrospira inopinata in response to a salinity gradient. Based on sequences retrieved with four sets of functional gene primes, comammox Nitrospira was in general, mainly composed of clade A, with a clear separation of clade A1 subgroup in all samples and clade A2 subgroup in low salinity ones. As expected, group 1.1 b and group 1.1 a AOA dominated the AOA community in low- and high-salinity samples, respectively. Nitrosomonas-AOB were detected in all samples while Nitrosos-pira-AOB were mainly found in relatively high-salinity samples. Regarding general Nitrospira, lineages Ⅱ and Ⅳ were the major groups in most of the samples, while lineage Ⅰ Nitrospira was only detected in low-salinity samples. Furthermore, the comammox pure culture of N. inopinata showed an optimal salinity at 0.5‰ and ceased to grow at 12.8‰ for ammonia oxidation, but remained active for nitrite oxidation. These results show new evidence regarding niche specificity of different nitrifying microorganisms modulated mainly by salinity, and also a clear response by comammox N. inopinata to a wide range of simulated salinity levels.
机译：最近发现完全氨氧化剂（Commammox），其将氨在单一生物中转化为硝酸盐，彻底改变了传统的理解，即两种硝化微生物必须参与硝化过程100多年。然而，如何响应盐度变化的不同类型的氮气仍然很大程度上不清楚。本研究不仅研究了纳米河口的亚硝化亚硝群落（包括氨氧化archaea（AOA），氨氧化细菌（Aob），Commammox和亚硝酸盐氧化氮，以找到盐度和功能社区之间的生态关系，并研究了典型Commomx Nitrospira Inopinata响应盐度梯度的生理学。基于用四组功能基因喷射检索的序列，Commammox Nitrospira一般，主要由疏枝A组成，在低盐度中的所有样品中清楚地分离在所有样品中，并在低盐度中的疏水层A2亚组。正如预期的那样，第1.1 B组和第1.1组AOA分别在低盐度样本中占据了AOA社区。在所有样品中检测到硝基昔塞洛斯-AOB，而Nitrosos-Pira-Aob主要发现在相对高盐度样本中。关于氮氮血清一般，统计学Ⅱ和Ⅳ大部分样品中的主要群体，而血管素均仅在低盐度样品中检测到。此外，NOPINATA的COMMAMOX纯培养物在0.5℃下显示出最佳盐度，并停止在12.8℃下生长，用于氨氧化，但保持亚硝酸盐氧化活性。这些结果表明了有关主要用盐度调节的不同硝化微生物的利基特异性的新证据，以及Commamx N. Inopinata的清晰反应也是众多模拟盐度水平。

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  • 来源
    《Oceanographic Literature Review》 |2021年第9期|1996-1996|共1页
  • 作者

    M. Zhao; X. Tang; D. Sun;

  • 作者单位

    School of Geographic Sciences East China Normal University 500 Dongchuan Road Shanghai 200241 China;

    School of Geographic Sciences East China Normal University 500 Dongchuan Road Shanghai 200241 China;

    School of Geographic Sciences East China Normal University 500 Dongchuan Road Shanghai 200241 China;

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