• 主题
高级搜索  >
历史搜索 清空历史
首页> 美国卫生研究院文献>Frontiers in Microbiology >Genome reconstructions indicate the partitioning of ecological functions inside a phytoplankton bloom in the Amundsen Sea, Antarctica
【2h】

Genome reconstructions indicate the partitioning of ecological functions inside a phytoplankton bloom in the Amundsen Sea, Antarctica

机译：基因组重建表明南极州阿蒙森海浮游植物开花内的生态功能分区

代理获取
本网站仅为用户提供外文OA文献查询和代理获取服务，本网站没有原文。下单后我们将采用程序或人工为您竭诚获取高质量的原文，但由于OA文献来源多样且变更频繁，仍可能出现获取不到、文献不完整或与标题不符等情况，如果获取不到我们将提供退款服务。请知悉。
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

Antarctica polynyas support intense phytoplankton blooms, impacting their environment by a substantial depletion of inorganic carbon and nutrients. These blooms are dominated by the colony-forming haptophyte Phaeocystis antarctica and they are accompanied by a distinct bacterial population. Yet, the ecological role these bacteria may play in P. antarctica blooms awaits elucidation of their functional gene pool and of the geochemical activities they support. Here, we report on a metagenome (~160 million reads) analysis of the microbial community associated with a P. antarctica bloom event in the Amundsen Sea polynya (West Antarctica). Genomes of the most abundant Bacteroidetes and Proteobacteria populations have been reconstructed and a network analysis indicates a strong functional partitioning of these bacterial taxa. Three of them (SAR92, and members of the Oceanospirillaceae and Cryomorphaceae) are found in close association with P. antarctica colonies. Distinct features of their carbohydrate, nitrogen, sulfur and iron metabolisms may serve to support mutualistic relationships with P. antarctica. The SAR92 genome indicates a specialization in the degradation of fatty acids and dimethylsulfoniopropionate (compounds released by P. antarctica) into dimethyl sulfide, an aerosol precursor. The Oceanospirillaceae genome carries genes that may enhance algal physiology (cobalamin synthesis). Finally, the Cryomorphaceae genome is enriched in genes that function in cell or colony invasion. A novel pico-eukaryote, Micromonas related genome (19.6 Mb, ~94% completion) was also recovered. It contains the gene for an anti-freeze protein, which is lacking in Micromonas at lower latitudes. These draft genomes are representative for abundant microbial taxa across the Southern Ocean surface.
机译：南极的polynyas支持强烈的浮游植物开花，通过大量消耗无机碳和养分来影响其环境。这些水华由形成菌落的南极植物Phaeocystis南极洲主导，并伴有独特的细菌种群。然而，这些细菌可能在南极疟原虫花蕾中发挥的生态作用正在等待其功能基因库及其支持的地球化学活动的阐明。在这里，我们报告了与Amundsen Sea polynya（南极洲）的南极疟原虫开花事件相关的微生物群落的一个元基因组分析（〜1.6亿次读取）。最丰富的拟杆菌和变形杆菌种群的基因组已经重建，网络分析表明这些细菌类群具有强大的功能分配。发现其中三个（SAR92，以及海洋螺旋藻科和冰蝶科的成员）与南极疟原虫菌落密切相关。它们的碳水化合物，氮，硫和铁代谢的独特特征可能有助于支持与南极疟原虫的相互关系。 SAR92基因组表明脂肪酸和二甲基磺基丙酸二甲酯（由南极疟原虫释放的化合物）降解成气溶胶前体二甲硫的专业化。海洋螺旋藻科基因组携带可能增强藻类生理性（钴胺素合成）的基因。最终，低温形态的基因组富含在细胞或菌落入侵中起作用的基因。还回收了新的微型真核生物，与微单胞菌相关的基因组（19.6 Mb，〜94％完成）。它包含一种抗冻蛋白的基因，在较低纬度的微单胞菌中缺乏。这些基因组草图代表了整个南部海洋表面丰富的微生物分类群。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
代理获取

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号