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首页> 外文期刊>Harmful Algae >Description of the new heterotrophic dinoflagellate Stoeckeria changwonensis n. sp. from Korean coastal waters and emended description of the genus Stoeckeria and the type species Stoeckeria algicida
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Description of the new heterotrophic dinoflagellate Stoeckeria changwonensis n. sp. from Korean coastal waters and emended description of the genus Stoeckeria and the type species Stoeckeria algicida

机译：新型异养二鞭毛藻鞭状体变种的描述。 sp。来源于韩国沿海水域，并对斯托克氏菌属和altoidas Stoeckeria类型种的描述进行了改进

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摘要

The planktonic heterotrophic dinoflagellate Stoeckeria changwonensis n. sp. isolated from the coastal waters off Korea is described from living and fixed cells by light, scanning electron (SEM), and transmission electron microscopy (TEM). For comparison with closely related species, the ultrastructure of Stoeckeria algicida, the only Stoeckeria species previously known, using TEM was also examined. Furthermore, DNA sequence data were collected from the small subunit (SSU), the D1-D3 large subunit (LSU), internal transcribed spacer regions (ITS1 and ITS2), and 5.8S of the ribosomal rDNA of S. changwonensis and compared to S. algicida. The SSU, ITS1-5.8S-ITS2, and the D1-D3 LSU rDNA sequences of the new dinoflagellate were ca. 2.2%, 16.8%, and 5.4% different, respectively, from those of S. algicida, but very similar to those of an unidentified dinoflagellate strain from Florida, USA, known as "Shepherd's Crook". In the phylogenetic tree based on D1-D3 LSU rDNA sequences, S. changwonensis formed a clade with this unidentified strain, which was clearly divergent from a clade comprising S. algicida and another unidentified "Shepherd's Crook" strain. Morphological analysis showed that S. changwonensis had thin plates with a Kofoidian plate formula of Po, cp, X, 4′, 2a, 7″, PC, 6c, 5+s, 5′″, Op, and 2″″, which conformed to the genus Stoeckeria. The size and overall shape of this dinoflagellate were similar to those of S. algicida. However, the size and position of each cingular plate relative to the surrounding plates in S. changwonensis were clearly different from those of S. algicida. The length of c2, c3, c4, c5, and c6 of S. changwonensis were similar, unlike in S. algicida, in which the lengths of c3 and c4 greatly exceeded that of c2, c5, and c6. In addition, plate c6 of S. changwonensis was sufficiently long to contact the 6″ plate, again in contrast with what happens in S. algicida. Using TEM, an eyespot in the sulcal areas of both Stoeckeria changwonensis and Stoeckeria algicida, which has not been seen in other species of the family Pfiesteriaceae was herein reported for the first time. On the basis of morphological and phylogenetic criteria, it is proposed that this is a new species of the genus Stoeckeria. In addition, the description of S. algicida has been emended to include previously unreported details regarding the relative size and position of the cingular plates, the presence of eyespots, and the ultrastructure of its cells examined using TEM.
机译：浮游生物异鞭毛藻鞭状体鞭原体。 sp。通过光，扫描电子（SEM）和透射电子显微镜（TEM）描述了从韩国沿海水域分离的活细胞和固定细胞。为了与密切相关的物种进行比较，还使用透射电子显微镜检查了以前唯一已知的斯托克氏菌种-阿尔茨克氏菌的超微结构。此外，还从昌原菌的小亚基（SSU），D1-D3大亚基（LSU），内部转录间隔区（ITS1和ITS2）以及核糖体rDNA 5.8S收集DNA序列数据，并将其与S 。algicida。新的鞭毛鞭毛虫的SSU，ITS1-5.8S-ITS2和D1-D3 LSU rDNA序列均为ca.与algicida S.的差异分别为2.2％，16.8％和5.4％，但与来自美国佛罗里达州的被称为“ Shepherd's Crook”的未鉴定的鞭毛藻菌株非常相似。在基于D1-D3 LSU rDNA序列的系统发育树中，昌原链球菌与这种身份不明的菌株形成了进化枝，显然与包括褐藻链球菌和另一种未知的“ Shepherd's Crook”菌株的进化枝不同。形态分析表明，昌原链霉菌具有薄板，其Kofoidian板式为Po，cp，X，4′，2a，7″，PC，6c，5 + s，5′″，Op和2″″，符合斯托克氏菌属。该鞭毛藻的大小和整体形状与褐藻链球菌相似。然而，昌原链霉菌中每个扣带状板相对于周围板的大小和位置都明显不同于褐藻链球菌。昌原链霉菌的c2，c3，c4，c5和c6的长度是相似的，这与algicida链霉菌中的c3和c4的长度大大超过c2，c5和c6的长度不同。此外，昌原链球菌的c6平板足够长，可以接触6英寸的平板，这再次与algicida链霉菌中的情况相反。使用TEM，首次报道了在Stoeckeria changwonensis和Stoeckeria algicida的沟区域中存在的眼点，这在Pfiesteriaceae家族的其他物种中尚未见到。根据形态学和系统发育标准，提出这是斯托克氏菌属的一个新物种。另外，已经对藻链球菌的描述进行了修改，以包括先前未报告的有关扣带状板的相对大小和位置，眼点的存在以及使用TEM检测的其细胞超微结构的细节。

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  • 来源
    《Harmful Algae》 |2014年第6期|38-56|共19页
  • 作者

    Hae Jin Jeong; Nam Seon Kang; Ojvind Moestrup; Yeong Du Yoo; Eric Potvin;

  • 作者单位

    School of Earth and Environmental Sciences, College of Natural Sciences, Seoul National University, Seoul 151-747, Republic of Korea,Advanced Institutes of Convergence Technology, Suwon, Gyeonggi-do 443-270, Republic of Korea;

    School of Earth and Environmental Sciences, College of Natural Sciences, Seoul National University, Seoul 151-747, Republic of Korea;

    Biological Institute, Section of Marine Biology, University of Copenhagen, Universitetsparken 4, DK-2100 Copenhagen K, Denmark;

    School of Earth and Environmental Sciences, College of Natural Sciences, Seoul National University, Seoul 151-747, Republic of Korea;

    School of Earth and Environmental Sciences, College of Natural Sciences, Seoul National University, Seoul 151-747, Republic of Korea;

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  • 原文格式 PDF
  • 正文语种 eng
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  • 关键词

    DNA; Eyespot; Heterotrophic protist; Morphology; Plankton; Ultrastructure;

    机译：脱氧核糖核酸;眼点;异养生物形态学;浮游生物超微结构;

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