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首页> 外文期刊>Polar biology >Penicillium solitum: si mesophilic, psychrotolerant fungus present in marine sediments from Antarctica
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Penicillium solitum: si mesophilic, psychrotolerant fungus present in marine sediments from Antarctica

机译：青霉：南极洲海洋沉积物中存在的嗜温，抗精神病真菌

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摘要

Few studies have addressed the diversity of cultivable fungi from marine sediments, especially those from Antarctica. In the present study, we evaluated the presence and distribution of cultivable fungi in marine core sediments obtained from 100, 500, 700 and 1,100 m below the Antarctic Ocean surface. Fifty-two fungal isolates were identified as Penicillium solitum by their physiological and morphological characteristics, and the identity of 12 representative isolates was further confirmed by sequencing of the ITS1-5.8S-ITS2 and P-tubulin genes. P. solitum displayed high sequence similarity to Penicillium taxa that have been described from other marine habitats. Conidial germination of P. solitum occurred at low temperatures and high salinities. In addition, P. solitum displayed extracellular amylasic and esterasic activities. The isolation of P. solitum from marine sediments in Antarctica and its survival at low temperatures and high salt concentrations suggest that it is adapted to the cold and halophilic environment of the Antarctic oceans. Because P. solitum produces extracellular enzymes, it is an interesting eukaryotic model for the study of structure-function relationships during enzymatic biocatalysis and biotransfor-mation under extreme conditions. Marine sediments from Antarctica may represent a unique source for obtaining extremophilic fungi. New studies using different culture media, temperatures ranges and pressure conditions as well as metagenomic techniques can assist in understanding the extremophilic fungal communities in marine sediments across the Antarctic Ocean.
机译：很少有研究探讨海洋沉积物，特别是南极沉积物中的可培养真菌的多样性。在本研究中，我们评估了可培养真菌在南极海面以下100、500、700和1100 m处获得的海洋核心沉积物中的存在和分布。根据其生理和形态学特征，将五十二种真菌分离物鉴定为茄青霉，并通过对ITS1-5.8S-ITS2和P-微管蛋白基因进行测序进一步证实了12种代表性分离物的身份。 P. solitum与其他海洋生境描述的青霉类群显示出高度的序列相似性。马铃薯假单胞菌的分生孢子萌发在低温和高盐度下发生。此外，P。solitum表现出胞外淀粉样和酯化活性。从南极洲海洋沉积物中分离出P. solitum，并在低温和高盐浓度下生存，这表明它适应了南极海洋的寒冷和嗜盐环境。由于马铃薯假单胞菌会产生细胞外酶，因此它是研究极端条件下酶促生物催化和生物转化过程中结构与功能关系的有趣的真核生物模型。来自南极洲的海洋沉积物可能是获得极端真菌的独特来源。使用不同培养基，温度范围和压力条件以及宏基因组学技术的新研究可以帮助理解南极海洋沉积物中的极端微生物真菌群落。

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  • 来源
    《Polar biology》 |2013年第12期|1823-1831|共9页
  • 作者

    Vivian N. Gongalves; Lucia S. Campos; Itamar S. Melo; Vivian H. Pellizari; Carlos A. Rosa; Luiz H. Rosa;

  • 作者单位

    Laboratorio de Sistematica e Biomoleculas de Fungos,Departamento de Microbiologia, Instituto de Ciencias Biologicas, Universidade Federal de Minas Gerais,P. O. Box 486, Belo Horizonte, MG CEP 31270-901, Brazil;

    Instituto de Biologia, Universidade Federal do Rio de Janeiro,Rio de Janeiro, RJ, Brazil;

    Laboratorio de Microbiologia Ambiental, EMBRAPA Meio Ambiente, Jaguariiina, Sao Paulo, Brazil;

    Instituto Oceanografico, Universidade de Sao Paulo, Sao Paulo,SP, Brazil;

    Laboratorio de Sistematica e Biomoleculas de Fungos,Departamento de Microbiologia, Instituto de Ciencias Biologicas, Universidade Federal de Minas Gerais,P. O. Box 486, Belo Horizonte, MG CEP 31270-901, Brazil;

    Laboratorio de Sistematica e Biomoleculas de Fungos,Departamento de Microbiologia, Instituto de Ciencias Biologicas, Universidade Federal de Minas Gerais,P. O. Box 486, Belo Horizonte, MG CEP 31270-901, Brazil;

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  • 正文语种 eng
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  • 关键词

    Antarctica; Fungi; Microorganism; Sediment; Taxonomy;

    机译：南极洲;菌类;微生物;沉淀;分类;

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