The second most abundant dinophyte in the ponds of a botanical garden is a species new to science

IF 2.1 4区 生物学 Q3 MICROBIOLOGY
Anna Müller, Marina Stark, Sophia Schottenhammel, Uwe John, Juliana Chacón, Andreas Klingl, Victoria Julia Christine Holzer, Marika Schöffer, Marc Gottschling
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Abstract

In the microscopy realm, a large body of dark biodiversity still awaits to be uncovered. Unarmoured dinophytes are particularly neglected here, as they only present inconspicuous traits. In a remote German locality, we collected cells, from which a monoclonal strain was established, to study morphology using light and electron microscopy and to gain DNA sequences from the rRNA operon. In parallel, we detected unicellular eukaryotes in ponds of the Botanical Garden Munich-Nymphenburg by DNA-metabarcoding (V4 region of the 18S rRNA gene), weekly sampled over the course of a year. Strain GeoK*077 turned out to be a new species of Borghiella with a distinct position in molecular phylogenetics and characteristic coccoid cells of ovoid shape as the most important diagnostic trait. Borghiella ovum, sp. nov., was also present in artificial ponds of the Botanical Garden and was the second most abundant dinophyte detected in the samples. More specifically, Borghiella ovum, sp. nov., shows a clear seasonality, with high frequency during winter months and complete absence during summer months. The study underlines the necessity to assess the biodiversity, particularly of the microscopy realm more ambitiously, if even common species such as formerly Borghiella ovum are yet unknown to science.

Abstract Image

植物园池塘中数量第二多的双子叶植物是科学界的新物种
在显微镜领域,大量的黑暗生物多样性仍有待发掘。无铠甲的二叶植物尤其被忽视,因为它们只呈现出不明显的特征。在德国的一个偏远地区,我们采集了一些细胞,并从中建立了一个单克隆菌株,利用光学和电子显微镜研究它们的形态,并从 rRNA 操作子中获得 DNA 序列。与此同时,我们还在慕尼黑宁芬堡植物园的池塘中,通过DNA元标码(18S rRNA基因的V4区域)检测了单细胞真核生物。结果表明,GeoK*077 菌株是博氏菌的一个新种,在分子系统学中具有独特的地位,卵形茧状细胞是其最重要的诊断特征。在植物园的人工池塘中也发现了新种鲍尔吉丝藻(Borghiella ovum),它是样本中含量第二高的双子叶植物。更具体地说,新种鲍吉丝藻(Borghiella ovum)有明显的季节性,冬季出现频率高,夏季则完全消失。这项研究强调,如果科学界对一些常见的物种(如以前的卵波姬菌)还一无所知,那么就有必要对生物多样性,尤其是显微镜领域的生物多样性进行更深入的评估。
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来源期刊
CiteScore
4.30
自引率
4.50%
发文量
85
审稿时长
6-12 weeks
期刊介绍: The Journal of Eukaryotic Microbiology publishes original research on protists, including lower algae and fungi. Articles are published covering all aspects of these organisms, including their behavior, biochemistry, cell biology, chemotherapy, development, ecology, evolution, genetics, molecular biology, morphogenetics, parasitology, systematics, and ultrastructure.
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