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首页> 外文OA文献 >Mangrove trees affect the community structure and distribution of anammox bacteria at an anthropogenic-polluted mangrove in the Pearl River Delta reflected by 16S rRNA and hydrazine oxidoreductase (HZO) encoding gene analyses
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Mangrove trees affect the community structure and distribution of anammox bacteria at an anthropogenic-polluted mangrove in the Pearl River Delta reflected by 16S rRNA and hydrazine oxidoreductase (HZO) encoding gene analyses

机译：红树林影响珠江三角洲人为污染红树林的厌氧氨氧化菌群落结构和分布，反映16s rRNa和肼氧化还原酶（HZO）编码基因分析

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摘要

Anaerobic ammonium oxidizing (anammox) bacterial community structures were investigated in surface (1-2 cm) and lower (20-21 cm) layers of mangrove sediments at sites located immediately to the mangrove trees (S0), 10 m (S1) and 1000 m (S2) away from mangrove trees in a polluted area of the Pearl River Delta. At S0, both 16S rRNA and hydrazine oxidoreductase (HZO) encoding genes of anammox bacteria showed high diversity in lower layer sediments, but they were not detectable in lower layer sediments in mangrove forest. S1 and S2 shared similar anammox bacteria communities in both surface and lower layers, which were quite different from that of S0. At all three locations, higher richness of anammox bacteria was detected in the surface layer than the lower layer; 16S rRNA genes revealed anammox bacteria were composed by four phylogenetic clusters affiliated with the "Scalindua" genus, and one group related to the potential anammox bacteria; while the hzo genes showed that in addition to sequences related to the "Scalindua", sequences affiliated with genera of "Kuenenia", "Brocadia", and "Jettenia" were also detected in mangrove sediments. Furthermore, hzo gene abundances decreased from 36.5 × 10 4 to 11.0 × 10 4 copies/gram dry sediment in lower layer sediments while increased from below detection limit to 31.5 × 10 4 copies/gram dry sediment in lower layer sediments from S0 to S2. The results indicated that anammox bacteria communities might be strongly influenced by mangrove trees. In addition, the correlation analysis showed the redox potential and the molar ratio of ammonium to nitrite in sediments might be important factors affecting the diversity and distribution of anammox bacteria in mangrove sediments. © 2011 The Author(s).
机译：在紧靠红树林（S0），10 m（S1）和1000的地点的红树林沉积物的表面（1-2 cm）和下层（20-21 cm）层中研究了厌氧铵氧化（anammox）细菌群落结构m（S2）远离珠江三角洲污染区的红树林。在S0时，厌氧细菌的16S rRNA和肼氧化还原酶（HZO）编码基因在下层沉积物中显示出高度多样性，但在红树林中的下层沉积物中却未检测到。 S1和S2在表层和下层共享相似的厌氧细菌群落，这与S0完全不同。在所有三个位置，表层的厌氧菌细菌含量均高于下层。 16S rRNA基因揭示了厌氧细菌是由隶属于“ Scalindua”属的四个系统发育簇组成的，一组与潜在的厌氧细菌有关。 hzo基因表明，除了与“ Scalindua”相关的序列外，在红树林沉积物中还检测到了与“ Kuenenia”，“ Brocadia”和“ Jettenia”属相关的序列。此外，下层沉积物中的hzo基因丰度从36.5×10 4降低到11.0×10 4拷贝/克干沙，而从S0到S2，则从低于检测极限增加到下层沉积物中的31.5×10 4拷贝/克干沙。结果表明，红树林中的厌氧菌可能对细菌群落有很大的影响。另外，相关性分析表明，沉积物中氧化还原电位和铵盐与亚硝酸盐的摩尔比可能是影响红树林沉积物中厌氧氨氧化细菌多样性和分布的重要因素。 ©2011作者。

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    Hong YG; Cao HL; Li M; Gu JD;

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