Abstract：
This study characterized cultivable fungi present in sediments obtained from Boeckella Lake, Hope Bay, in the north-east of the Antarctic Peninsula, and evaluated their production of enzymes and biosurfactants of potential industrial interest. A total of 116 fungal isolates were obtained, which were classified into 16 genera within the phyla Ascomycota, Basidiomycota and Mortierellomycota, in rank. The most abundant genera of filamentous fungi included Pseudogymnoascus, Pseudeurotium and Antarctomyces; for yeasts, Thelebolales and Naganishia taxa were dominant. Overall, the lake sediments exhibited high fungal diversity and moderate richness and dominance. The enzymes esterase, cellulase and protease were the most abundantly produced by these fungi. Ramgea cf. ozimecii, Holtermanniella wattica, Leucosporidium creatinivorum, Leucosporidium sp., Mrakia blollopis, Naganishia sp. and Phenoliferia sp. displayed enzymatic index > 2. Fourteen isolates of filamentous fungi demonstrated an Emulsification Index 24% (EI24%) ≥ 50%; among them, three isolates of A. psychrotrophicus showed an EI24% > 80%. Boeckella Lake itself is in the process of drying out due to the impact of regional climate change, and may be lost completely in approaching decades, therefore hosts a threatened community of cultivable fungi that produce important biomolecules with potential application in biotechnological processes.
摘要：
这项研究表征了从BoeckellaLake获得的沉积物中存在的可培养真菌，希望湾,在南极半岛的东北部，并评估了他们的潜在工业兴趣的酶和生物表面活性剂的生产。共获得116株真菌分离物,在子囊门内被分为16个属，担子菌和被孢菌,在等级上。丝状真菌最丰富的属包括假木曲，假尿嘧啶和南极霉菌；对于酵母，Thelebolales和Naganishia分类群占主导地位。总的来说,湖泊沉积物表现出高度的真菌多样性和中等的丰富度和优势度。酯酶，纤维素酶和蛋白酶是这些真菌产生最多的。Rambeacf.ozimecii,Holtermanniellawattica,肌白孢子虫,白孢子虫。,Mrakiablollopis,Naganishiasp.和苯酚。显示酶指数>2。14株丝状真菌的乳化指数为24％（EI24％）≥50％；其中，三个嗜冷菌分离株的EI24%>80%。由于区域气候变化的影响，Boeckella湖本身正处于干燥过程中，可能会在接近几十年的时间里完全消失，因此，拥有一个受威胁的可培养真菌群落，这些真菌产生重要的生物分子，在生物技术过程中具有潜在的应用。
