Phylogenetic diversity of the dddp gene for dimethylsulfoniopropionate-dependent dimethyl sulfide synthesis in mangrove soils
文献类型: 外文期刊
第一作者: Peng, Mengjun
作者: Peng, Mengjun;Hu, Huo;Li, Youguo;Xie, Qingyi;Hong, Kui;Todd, Jonathan D.;Johnston, Andrew W. B.
作者机构:
关键词: Clone library;dddP;Diversity;Mangrove soil;PCR
期刊名称:CANADIAN JOURNAL OF MICROBIOLOGY ( 影响因子:2.419; 五年影响因子:2.35 )
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收录情况: SCI
摘要: The dddP gene encodes an enzyme that cleaves dimethylsulfoniopropionate (DMSP) into dimethyl sulfide (DMS) plus acrylate and has been identified in various marine bacteria and some fungi. The diversity of dddP genes was investigated by culture-independent PCR-based analysis of metagenomic DNA extracted from 4 mangrove soils in Southern China. A phylogenetic tree of 144 cloned dddP sequences comprised 7 groups, 3 of which also included dddP genes from previously identified Ddd + (DMSP-dependent DMS production) bacteria. However, most (69%) of the DddP sequences from the mangroves were in 4 other subgroups that did not include sequences from known bacteria, demonstrating a high level of diversity of this gene in these environments. Each clade contained clones from all of the sample sites, suggesting that different dddP types are widespread in mangroves of different geographical locations. Furthermore, it was found the dddP genotype distribution was remarkably influenced by the soil properties pH, available sulfur, salt, and total nitrogen.
分类号: Q93
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