細胞板形成における細胞骨格機能のイメージング解析(<特集>情報処理システムとしての植物細胞壁)
2015 年 50 巻 1 号 p. 50-56
詳細
2015 年 50 巻 1 号 p. 50-56
The plant cytoskeleton, which consists of microtubules and actin microfilaments, shows dynamic structural changes during the progression of the cell cycle. The cytoskeleton plays significant roles in cell shape and cell movement, and especially in cell division, including nuclear division and cytokinesis. In animal cells, the actin contractile ring divides cells centripetally. In contrast, flowering plants have a rigid cell wall around their cells, and therefore, the cells must divide in a physically restricted space. To accomplish cell division, components of the cytoskeletal mitotic apparatus appear in the following order : the preprophase band (PPBs) from the late G_2 phase to prophase, the mitotic spindle from prometaphase to anaphase, and the phragmoplast at telophase. The phragmoplast is a structure specific to plant cells that develops centrifugally on an equatorial plane.It forms the "cell plate" by serving as a scaffold for its assembly during successive stages of cytokinesis. The cell plate subsequently develops into a new cell wall that separates the two daughter cells. In this article, we summarize our research on the structure of the plant cytoskeleton and its roles in cell plate formation.
