Stomatogenesis of the ciliate genus Strombidinopsis with an improved description of S-spiniferum and S-acuminatum
Stomatogenesis of the ciliate genus Strombidinopsis with an improved description of S-spiniferum and S-acuminatum
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DOI：
10.1111/j.1550-7408.1998.tb04527.x
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发表时间：
1998-03-01
影响因子：
2.2
通讯作者：
Lynn, DH
中科院分区：
文献类型：
--
作者：
Dale, T;Lynn, DH
用Protargol染色法对刺突拟陀螺藻和S. acuminatum的细胞分裂方式为一种对映型。口腔发生可分为八个阶段。第1阶段是一个前无政府领域的几个kinetosomes的外观，可能起源apokinetally附近的体细胞kinety的背侧的细胞。在第二阶段，无政府领域变得更密集，更大的激动体复制。在第3阶段，激动体排列成口服多激动体（OPk）。在第四阶段，当大部分的无政府领域已经转化为OPk的时候，出现了口旁（PO）。在第5阶段，所有的OPk's都明显形成，原基类似于一个桶，缺少一些棒。在第六阶段圆筒相对于电池的轴线横向旋转大约90度，同时圆筒的外端张开。在第七阶段体细胞开始分裂，原基向细胞表面开放，具有内部OPk的部分螺旋进入口腔，而OPk形成闭合的环。在这个阶段，可以看到一个或两个大的大核准备分裂。在第8阶段，成体或间期阶段，形成细胞咽。基于我们的结果，S. spinifierum和S. acuminatum必须在三个方面进行修饰：细胞具有PO; OPk由三排激动体组成（S. acuminatum）。而不是最初报道的两个：内部OPk的数量并不总是3，而是在S中的3-4范围内。spiniferum和S.渐尖的
Protargol-stained cultured samples of Strombidinopsis spiniferum and S. acuminatum revealed a kind of enantiotropic mode of cell division. Stomatogenesis may be divided into eight stages. Stage 1 was the appearance of an anterior anarchic field of a few kinetosomes, probably originating apokinetally near a somatic kinety on the dorsal side of the cell. In Stage 2, the anarchic field becomes denser and larger by kinetosomal replication. The kinetosomes become aligned as oral polykinetids (OPk's) in Stage 3. In Stage 4, the paroral (PO) emerges when most of the anarchic field has transformed into OPk's. In Stage 5, all OPk's are apparently formed, and the anlage resembles a barrel, lacking a few staves. In Stage 6. the barrel rotates approximately 90 degrees transversely to the cell's axis, concomitantly the outer end of the barrel splays open. In Stage 7. the somatic kineties start to divide, the anlage has opened to the cell surface, and the part with the internal OPk's spirals into the oral cavity while the OPk's form a closed circle. At this stage, one or two large macronuclei were seen preparing to divide. In Stage 8, the adult or interphase stage, the cytopharynx is formed. Based on our results, the original redescriptions of S. spinifierum and S. acuminatum must be modified in three respects: the cells have a PO; the OPk's are composed of three rows of kinetosomes (uncertain for S. acuminatum). not two as originally reported: and the number of internal OPk's is not always 3, but ranges from 3-4 in S. spiniferum and 3-5 in S. acuminatum.