Guerra-Mateo Daniel, Gené Josepa, Becker Pierre, Cano-Lira José F
Universitat Rovira i Virgili, Facultat de Medicina i Ciències de la Salut, Unitat de Micologia i Microbiologia Ambiental, Reus, Spain Universitat Rovira i Virgili Reus Spain.
Institut Universitari de Recerca en Sostenibilitat, Canvi Climàtic i Transició Energètica (IU-RESCAT), Vila-seca, Spain Institut Universitari de Recerca en Sostenibilitat, Canvi Climàtic i Transició Energètica Vila-seca Spain.
IMA Fungus. 2025 Sep 4;16:e158470. doi: 10.3897/imafungus.16.158470. eCollection 2025.
The represent a versatile group of fungi that primarily inhabit soils, degrading cellulose and/or keratin. While some are known human pathogens, others are osmotolerant or colonize chitin substrates such as insects. The marine environment, characterized by 3.5% salinity and chitin as the dominant polysaccharide, represents an intriguing niche for these fungi. However, fungal diversity in this environment remains poorly studied. This study investigated the culturable diversity of in marine sediments, explored their global biogeography, and assessed their adaptability to marine conditions. Marine sediments were collected near river mouths and other coastal areas along the Catalan coast (Spain). Identification was based on a polyphasic approach; global distribution patterns were assessed through the GlobalFungi database, and adaptability was evaluated through osmotolerance and substrate degradation assays (cellulose, chitin, keratin). We recovered 32 strains, of which 24 represented 16 known species distributed in , , , and ; ; ; and and . The remaining eight strains were delineated as six novel species, including a new genus: , , , , , and In addition, all strains degraded cellulose, and most tolerated up to 10% NaCl. Only four species that also degraded chitin (, , , and ) could be considered facultative marine fungi. This work evidences the great diversity of onygenalean fungi in marine sediments and underscores their metabolic adaptability to marine conditions.
它们代表了一类多样的真菌，主要栖息于土壤中，降解纤维素和/或角蛋白。虽然有些是已知的人类病原体，但其他一些具有耐渗透压性或定殖于几丁质底物（如昆虫）上。以3.5%的盐度和几丁质作为主要多糖为特征的海洋环境，对这些真菌来说是一个有趣的生态位。然而，这种环境中的真菌多样性仍研究不足。本研究调查了海洋沉积物中此类真菌的可培养多样性，探索了它们的全球生物地理学，并评估了它们对海洋条件的适应性。在加泰罗尼亚海岸（西班牙）的河口和其他沿海地区附近采集了海洋沉积物。鉴定基于多相方法；通过GlobalFungi数据库评估全球分布模式，并通过耐渗透压性和底物降解试验（纤维素、几丁质、角蛋白）评估适应性。我们分离出32株菌株，其中24株代表16个已知物种，分布在……以及……；其余8株菌株被划定为6个新物种，包括一个新属：……此外，所有菌株都能降解纤维素，大多数能耐受高达10%的NaCl。只有4个也能降解几丁质的物种（……）可被视为兼性海洋真菌。这项工作证明了海洋沉积物中发癣菌类真菌的巨大多样性，并强调了它们对海洋条件的代谢适应性。 （原文部分内容缺失，用“……”表示）
