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首页> 外文期刊>Protoplasma: An International Journal of Cell Biology >A unique pattern of F-actin organization supports cytokinesis in vacuolated cells of Macrocystis pyrifera (Phaeophyceae) gametophytes
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A unique pattern of F-actin organization supports cytokinesis in vacuolated cells of Macrocystis pyrifera (Phaeophyceae) gametophytes

机译：F-肌动蛋白组织的独特模式可支持萤火虫（Phyeophyceae）配子体空泡细胞的胞质分裂

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摘要

The organization of actin filaments and their role in cytokinesis was studied in regenerating protoplasts and thallus cells of gametophytes of the brown alga Macrocystis pyrifera. Before the onset of cytokinesis, a ring of actin filaments appeared on the putative cytokinetic plane just under the plasmalemma. Light and electron microscopy of cytokinetic cells revealed that large vacuoles occupy the space between the daughter nuclei, which very often are eccentrically positioned at the cell cortex. By the progress of cytokinesis, actin filament bundles emanating from the cytokinetic ring tend to form an actin plate that enters cytoplasmic pockets in which the cytokinetic diaphragm develops. The mechanism of this cytokinetic pattern that has not been reported so far for brown algae is discussed.
机译：研究了肌动蛋白丝的组织及其在胞质分裂中的作用，该酶在褐藻Macrocystis pyrifera配子体的原生质体和all体细胞的再生中得到了研究。在胞质分裂发生之前，肌动蛋白丝环出现在质膜下的假定的细胞动力学平面上。细胞动力学细胞的光镜和电子显微镜显示，大液泡占据子核之间的空间，子核经常偏心地位于细胞皮层。随着胞质分裂的进展，从细胞动力学环发出的肌动蛋白丝束趋向于形成肌动蛋白板，该肌动蛋白板进入进入细胞质膜的细胞质袋。讨论了迄今尚未报道的褐藻这种细胞动力学模式的机制。

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