南极洲南设得兰群岛附近海洋沉积物中可培养 Ascomycota 真菌的多样性及酶活性、生物表面活性剂和植物毒性。

IF 2.6 3区 生物学 Q3 BIOCHEMISTRY & MOLECULAR BIOLOGY
Mayanne Karla da Silva, Débora Luiza Costa Barreto, Rosemary Vieira, Arthur Ayres Neto, Fábio Soares de Oliveira, Peter Convey, Carlos Augusto Rosa, Alysson Wagner Fernandes Duarte, Luiz Henrique Rosa
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引用次数: 0

摘要

我们研究了从南极海洋深层沉积物中发现的可培养真菌群落,并评估了它们产生外酶、乳化剂和具有植物毒性活性的代谢物的能力。回收并鉴定了 68 个 Ascomycota 真菌分离物。回收的最多分类群是酵母菌 Meyerozyma guilliermondii,其次是丝状真菌 Penicillium chrysogenum、P. cf. palitans、Pseudeurotium cf. bakeri、Thelebolus balaustiformis、Antarctomyces psychrotrophicus 和 Cladosporium sp。在所有取样深度的沉积物中只检测到 M. guilliermondii 和 P. cf. palitans,它们是所有取样地点含量最高的类群。检测到的最多的酶是蛋白酶,其次是转化酶、纤维素酶、脂肪酶、角叉菜胶酶、琼脂酶、果胶酶和酯酶。四个分离株显示出良好的生物表面活性剂活性,特别是地方性物种 A. psychrotrophicus。24 个分离出的 P. cf. palitans 对模型 Lactuca sativa 和 Allium schoenoprasum 具有很强的植物毒性。回收的可培养真菌在产生水解外酵素、生物表面活性剂分子和具有植物毒性活性的代谢物方面表现出良好的生物合成活性,这加强了记录南大洋深海沉积物中真菌的分类学、生态学和生物技术特性的重要性。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Diversity and enzymatic, biosurfactant and phytotoxic activities of culturable Ascomycota fungi present in marine sediments obtained near the South Shetland Islands, maritime Antarctica.

We studied the culturable fungal community recovered from deep marine sediments in the maritime Antarctic, and assessed their capabilities to produce exoenzymes, emulsifiers and metabolites with phytotoxic activity. Sixty-eight Ascomycota fungal isolates were recovered and identified. The most abundant taxon recovered was the yeast Meyerozyma guilliermondii, followed by the filamentous fungi Penicillium chrysogenum, P. cf. palitans, Pseudeurotium cf. bakeri, Thelebolus balaustiformis, Antarctomyces psychrotrophicus and Cladosporium sp. Diversity indices displayed low values overall, with the highest values obtained at shallow depth, decreasing to the deepest location sampled. Only M. guilliermondii and P. cf. palitans were detected in the sediments at all depths sampled, and were the most abundant taxa at all sample sites. The most abundant enzymes detected were proteases, followed by invertases, cellulases, lipases, carrageenases, agarases, pectinases and esterases. Four isolates showed good biosurfactant activity, particularly the endemic species A. psychrotrophicus. Twenty-four isolates of P. cf. palitans displayed strong phytotoxic activities against the models Lactuca sativa and Allium schoenoprasum. The cultivable fungi recovered demonstrated good biosynthetic activity in the production of hydrolytic exoenzymes, biosurfactant molecules and metabolites with phytotoxic activity, reinforcing the importance of documenting the taxonomic, ecological and biotechnological properties of fungi present in deep oceanic sediments of the Southern Ocean.

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来源期刊
Extremophiles
Extremophiles 生物-生化与分子生物学
CiteScore
6.80
自引率
6.90%
发文量
28
审稿时长
2 months
期刊介绍: Extremophiles features original research articles, reviews, and method papers on the biology, molecular biology, structure, function, and applications of microbial life at high or low temperature, pressure, acidity, alkalinity, salinity, or desiccation; or in the presence of organic solvents, heavy metals, normally toxic substances, or radiation.
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