Laboratory of Molecular Systematics of Aquatic Plants, K.A. Timiryazev Institute of Plant Physiology RAS, IPP RAS, 127276 Moscow, Russia.
Papanin Institute for Biology of Inland Waters RAS, Borok, Nekouz, 152742 Yaroslavl, Russia.
Cells. 2022 Aug 7;11(15):2446. doi: 10.3390/cells11152446.
We studied the morphology, ultrastructure, and phylogeny of eight soil diatom strains assigned to the genus. Six of these strains, identified by us as new species, are described for the first time. We provide a comprehensive comparison with related species and include ecological data. Molecular phylogeny reconstruction using 18S rDNA and L affiliates the new strains with different subclades within , including 'borealis', 'grunowii' and 'stomatophora'. We also studied the fatty acid profiles in connection with the emerging biotechnological value of diatoms as a source of lipids. Stearic (36.0-64.4%), palmitic (20.1-30.4%), and palmitoleic (up to 20.8%) acids were the dominant fatty acids in the algae cultured on Waris-H + Si medium. High yields of saturated and monounsaturated fatty acids position the novel strains as a promising feedstock for biofuel production.
我们研究了属于的 8 个土壤硅藻菌株的形态、超微结构和系统发育。其中 6 个菌株被我们鉴定为新物种，这是首次描述。我们与相关物种进行了全面比较，并包括了生态数据。使用 18S rDNA 和 L 进行的分子系统发育重建将新菌株与 内的不同亚群联系在一起，包括“borealis”、“grunowii”和“stomatophora”。我们还研究了脂肪酸图谱，因为硅藻作为脂质的来源具有新兴的生物技术价值。在 Waris-H + Si 培养基上培养的藻类中，主要的脂肪酸是硬脂酸（36.0-64.4%）、棕榈酸（20.1-30.4%）和棕榈油酸（高达 20.8%）。高含量的饱和和单不饱和脂肪酸使新型菌株成为生物燃料生产有前途的原料。
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