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首页> 外文期刊>Protoplasma: An International Journal of Cell Biology >THE PERINUCLEAR MICROTUBULE SYSTEM IN THE GREEN ALGA ACETABULARIA - ANCHOR OR MOTILITY DEVICE
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THE PERINUCLEAR MICROTUBULE SYSTEM IN THE GREEN ALGA ACETABULARIA - ANCHOR OR MOTILITY DEVICE

机译：绿藻埃塔布拉菌属的微核微管系统-锚固或运动装置

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Migrating secondary nuclei in Acetabularia are tightly associated with actin bundles and possess a comet-like tail composed of microtubules. When secondary nuclei begin to settle in preparation for cyst morphogenesis, the tails expand into radially symmetrical arrays of microtubules. Concomitantly, nuclei become gradually dissociated from the actin bundles and eventually stop moving, even though the actin bundles remain intact and persist through this stage. If, however, the radial perinuclear microtubule arrays are destroyed by inhibitors, the nuclei reassociate with the actin bundles and regain their motile activity. Because this movement is sensitive to Cytochalasin D, we propose that actin is required for nuclear movements, whereas microtubules most likely function as a trailing anchor that begins to act as a braking device above a certain threshold in the number and length of perinuclear microtubules. [References: 44]
机译：棘骨bul的次级核的迁移与肌动蛋白束紧密相关，并具有由微管组成的彗星状尾巴。当次级核开始沉降以准备囊肿形态发生时，尾巴会扩张成径向对称的微管阵列。同时，即使肌动蛋白束保持完整并在此阶段持续存在，细胞核也逐渐从肌动蛋白束中解离，并最终停止移动。但是，如果放射状核周微管阵列被抑制剂破坏，则核会与肌动蛋白束重新结合并恢复其活动活性。因为此运动对细胞松弛素D敏感，所以我们建议肌动蛋白是核运动所必需的，而微管最有可能充当拖尾锚，并在超过一定阈值的核周微管长度和长度上开始充当制动装置。 [参考：44]

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