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首页> 外文期刊>Polar biology >Genetic signatures indicate widespread antibiotic resistance and phage infection in microbial communities of the McMurdo Dry Valleys, East Antarctica
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Genetic signatures indicate widespread antibiotic resistance and phage infection in microbial communities of the McMurdo Dry Valleys, East Antarctica

机译：遗传特征表明，南极东部麦克默多干旱谷的微生物群落中普遍存在抗生素耐药性和噬菌体感染

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摘要

The McMurdo Dry Valleys of Antarctica support extensive yet cryptic microbial communities but little evidence for 'top-down' herbivory control. A question therefore arises as to how standing microbial biomass is regulated. Here, we present results from a survey of soil and rock microbial community metagenomes using the GeoChip microarray that demonstrate antibiotic resistance and phage infection are widespread. We interrogated a range of dry valley locations from maritime to extreme inland sites. Antibiotic resistance genes were identified in three categories: beta-lactamases, tetracycline and vanomycin plus a range of transporter genes. Frequency of recovery generally reflected microbial diversity, with greatest abundance among Halobacteria, Proteobacteria and the photosynthetic bacteria (Chlorobi, Chloroflexi and Cyanobacteria). However, no clear differences between locations and soil/rock communities were apparent. Phage signals were also recovered from all locations in soil and rock communities. The Leviviridae, Myoviridae, Podoviridae and Siphoviridae were ubiquitous . The Corticoviridae occurred only in moisture-sufficient hyporheic soils, the Microviridae occurred only in maritime and hyporheic sites and an unidentified group within the order Caudovirales occurred only at dry inland sites. We postulate that widespread antibiotic resistance indicates potential inter-specific interaction and that phage signals indicate possible 'bottom-up' trophic regulation in the dry valleys.
机译：南极麦克默多干旱谷支持广泛而隐秘的微生物群落，但很少有证据证明“自上而下”的食草控制。因此，产生了一个问题，即如何调节固定的微生物生物量。在这里，我们介绍了使用GeoChip微阵列对土壤和岩石微生物群落元基因组进行的调查结果，结果表明抗生素耐药性和噬菌体感染广泛存在。我们调查了从海洋到内陆极端地区的一系列干旱谷地。抗生素抗性基因分为三类：β-内酰胺酶，四环素和凡霉素，以及一系列转运蛋白基因。恢复的频率通常反映了微生物的多样性，其中嗜盐菌，变形杆菌和光合细菌（Chlorobi，Chloroflexi和Cyanobacteria）的丰度最大。但是，位置和土壤/岩石群落之间没有明显的区别。还从土壤和岩石群落的所有位置恢复了噬菌体信号。病毒科，Myoviridae，Podoviridae和Siphoviridae无处不在。皮质病毒科仅在水分充足的低渗性土壤中发生，微病毒科仅在海洋和低渗性站点中发生，而考多韦拉氏菌顺序内的一个身份不明的群体仅在干燥的内陆地区发生。我们推测广泛的抗生素耐药性表明潜在的种间相互作用，噬菌体信号表明干旱谷可能存在“自下而上”的营养调节。

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  • 来源
    《Polar biology》 |2015年第6期|919-925|共7页
  • 作者

    Wei Sean T. S.; Higgins Colleen M.; Adriaenssens Evelien M.; Cowan Don A.; Pointing Stephen B.;

  • 作者单位

    Auckland Univ Technol, Inst Appl Ecol New Zealand, Sch Appl Sci, Auckland 1142, New Zealand;

    Auckland Univ Technol, Inst Appl Ecol New Zealand, Sch Appl Sci, Auckland 1142, New Zealand;

    Univ Pretoria, Ctr Microbial Ecol & Genom, ZA-0002 Pretoria, South Africa;

    Univ Pretoria, Ctr Microbial Ecol & Genom, ZA-0002 Pretoria, South Africa;

    Auckland Univ Technol, Inst Appl Ecol New Zealand, Sch Appl Sci, Auckland 1142, New Zealand|Univ Waikato, Int Ctr Terr Antarctic Res, Hamilton 3240, New Zealand;

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  • 正文语种 eng
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  • 关键词

    Antibiotic resistance; Antarctic Dry Valleys; Phage; Trophic controls; Virus;

    机译：抗生素耐药性;南极干旱谷;噬菌体;营养控制;病毒;

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