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首页> 外文期刊>Harmful Algae >Ultrastructure of the intracellular parasite Parvilucifera sinerae (Alveolata, Myzozoa) infecting the marine toxic planktonic dinoflagellate Alexandrium minutum (Dinophyceae)
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Ultrastructure of the intracellular parasite Parvilucifera sinerae (Alveolata, Myzozoa) infecting the marine toxic planktonic dinoflagellate Alexandrium minutum (Dinophyceae)

机译：细胞内寄生虫Parvilucifera sinerae（Alveolata，Myzozoa）的超微结构感染海洋有毒浮游性甲鞭毛藻亚历山大藻（Dinophyceae）

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摘要

This ultrastructural study follows the infection by a parasite, Parvilucifera sinerae, of the marine toxic dinoflagellate Alexandrium minutum. In clonal cultures, infective zoospores, which are the infectious stage, entered host cells where they developed into sporangia. Mature, dark-colored sporangia were released from the dead dinoflagellate cells by the break-up of the host theca. The sporangial cytoplasm ultimately differentiated into many minute zoospores that escaped one host cell and subsequently infected healthy cells. The zoospores are 1.2-1.8 μm in diameter and possess an anterior (transverse) and shorter posterior flagellum in addition to alveoli, a refractile body, a mitochondrion with tubular cristae, micronemes, rhoptries, and a pseudoconoid. As in the other Parvilucifera species, the zoospore has a heteromorphic pair of central microtubules in the anterior axoneme and a reduced pseudoconoid. The micronemes have bulbous posterior ends and, as in other known species of the genus, there are (pseudo)conoid-associated micronemes. A comparison of these ultrastructural data with those available from the other two Parvilucifera species showed that, as in Parvilucifera infectans, the periphery of the nucleus is filled with thin fibers, in contrast to the syndinean-like nucleus of Parvilucifera prorocentri. Also, as in P. infectans, the transition region of the flagellar axoneme contains a dense structure, and the basal body a black globule; however, both structures are absent in P. prorocentri. There are no morphological differences of the zoospores from P. sinerae and P. infectans. The main difference between P. infectans and P. sinerae relay on the sporangium wall and ornamentation. The sporangium wall in P. sinerae consisted of three layers instead of two described layers in P. infectans. Therefore, morphologically, P. sinerae shows greater similarity to P. infectans than to P. prorocentri.
机译：这项超微结构研究是在寄生虫Parvilucifera sinerae感染了海洋有毒的鞭毛藻亚历山大藻后进行的。在克隆培养中，传染性游动孢子是传染性阶段，进入宿主细胞后会发育成孢子囊。成熟的深色孢子囊通过宿主卵泡膜的破裂而从死亡的鞭毛藻细胞中释放出来。孢子囊细胞质最终分化成许多微小的游动孢子，它们逃逸了一个宿主细胞并随后感染了健康细胞。游动孢子的直径为1.2-1.8μm，除了肺泡，折射体，带有管状cr，微neme，斜纹体和假圆锥体的线粒体之外，还具有前（横）和后鞭毛短。与其他Parvilucifera物种一样，游动孢子在前轴突中有一对异形的中央微管，并具有减少的假圆锥体。微尼姆具有球根状的后端，并且，如同在该属的其他已知物种中一样，存在（假）与类固醇相关的微尼姆。将这些超微结构数据与其他两个Parvilucifera物种获得的数据进行比较后发现，与感染Parvilucifera infectans一样，细胞核的周围充满了细纤维，而与原百里香的类似syn牙形的细胞核相反。另外，如在感染毕赤酵母中一样，鞭毛轴突的过渡区域含有致密的结构，而基体则为黑色小球。但是，P。prorocentri中都没有这两种结构。中华假单胞菌和感染假单胞菌的游动孢子没有形态学差异。传染性假单胞菌和中华假单胞菌之间的主要区别在于孢子囊壁和装饰物。中华假单胞菌的孢子囊壁由三层组成，而不是由感染性假单胞菌描述的两层组成。因此，从形态学上看，中华假单胞菌与传染性假单胞菌比原中心疟原虫具有更大的相似性。

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  • 来源
    《Harmful Algae》 |2010年第1期|p.64-70|共7页
  • 作者

    Esther Garces; Mona Hoppenrath;

  • 作者单位

    Departament de Biologia Marina i Oceanografia, Institut de Ciencies del Mar, CSIC, Pg. Maritim de la Barceloneta, 37-49, E08003 Barcelona, Spain;

    Forschungsinstitut Senckenberg, Deutsches Zentrum fuer Marine Biodiversitaetsforschung (DZMB), Suedstrand 44, D-26382 Wilhelmshaven, Germany;

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  • 正文语种 eng
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  • 关键词

    apicomplexa; dinoflagellates; parvilucifera; perkinsids; ultrastructure;

    机译：apicomplexa;鞭毛虫小花珀金氏菌超微结构;

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