Morphogenesis of the Marine Ciliate, Pseudoamphisiella alveolata (Kahl, 1932) Song & Warren, 2000 (Ciliophora, Stichotrichia, Urostylida) During Binary Fission
Morphogenesis of the Marine Ciliate, Pseudoamphisiella alveolata (Kahl, 1932) Song & Warren, 2000 (Ciliophora, Stichotrichia, Urostylida) During Binary Fission
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DOI：
10.1111/j.1550-7408.2006.00117.x
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发表时间：
2006-07
影响因子：
2.2
通讯作者：
Chen Shao;Weibo Song;A. Warren;K. Al-Rasheid;Zhenzhen Yi;J. Gong
中科院分区：
文献类型：
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作者：
Chen Shao;Weibo Song;A. Warren;K. Al-Rasheid;Zhenzhen Yi;J. Gong
摘要。采用蛋白银银浸渍法研究了青岛胶州湾湾单囊纤毛虫泡状伪双肢藻（Pseudoamphisiellaalveolata）二分裂过程中的形态发生。该方法的特征如下：（1）在前体中，只有膜的亲代口侧区的后部被更新，在那里膜去分化，然后重建UM原基和缺失的膜，（2）后体中的口原基和两个分隔物中的FVT原基在细胞表面上重新形成，（3）“额外”原基，其产生于右边缘原基的右侧，发育成三个或四个连接尾纤毛与边缘行的“额外”边缘纤毛，（4）右边缘原基形成于旧结构内，（5）FVT-纤毛以初级模式发育，以及（6）与大多数stichotrichs不同，两个分隔器中的右边缘原基紧密地在一起产生。作为一个额外的贡献，形态发生模式的多样性内属Pseudoamphisiella进行了讨论。根据形态发生学和SS rRNA基因序列分析结果，对拟双端藻属和拟双端藻科的系统位置进行了简要分析。结果表明，它们很可能是尾柱目中进化程度较高的类群。
ABSTRACT. Morphogenesis during the binary fission of the stichotrich ciliate Pseudoamphisiella alveolata, isolated from Jiaozhou Bay near Qingdao, China, was investigated using protargol silver impregnation. The process is characterized as follows: (1) in the proter, only the posterior part of the parental adoral zone of membranelles is renewed, where the membranelles dedifferentiate and then rebuild the UM‐anlage and the missing membranelles, (2) the oral primordium in the opisthe and the FVT‐anlagen in both dividers are formed de novo on the cell surface, (3) an “extra” anlage, which is generated on the right of the right marginal anlage, develops into three or four “extra” marginal cirri that connect the caudal cirri with the marginal rows, (4) the right marginal anlage is formed within the old structure, (5) the FVT‐cirri develop in a primary mode, and (6) unlike most stichotrichs, the right marginal anlagen in both dividers generate closely together. As an additional contribution, the diversity of morphogenetic patterns within the genus Pseudoamphisiella is discussed. Based on both morphogenetic and SS rRNA gene sequencing data, the systematic position of the genus Pseudoamphisiella as well as the family Pseudoamphisiellidae Song et al. 1997 is briefly analyzed. The results indicate that they should very possibly represent a higher evolved group in the order Urostylida.