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单词 phragmoplast
释义

phragmoplast


phragmoplast

(ˈfræɡməˌplæst) n (Biology) biology a structure or barrier that forms in the later stages of a plant's development, within which cell plates form

phrag•mo•plast

(ˈfræg məˌplæst)

n. the cytoplasmic structure that forms at the equator of the spindle after the chromosomes have divided during the anaphase of plant mitosis, and that initiates cell division. [1910–15; < Greek phrágm(a) fence (derivative of phrassein to fence in) + -o- + -plast]

Phragmoplast


phragmoplast

[′frag·mə‚plast] (cell and molecular biology) A thin barrier which is formed across the spindle equator in late cytokinesis in plant cells and within which the cell wall is laid down.

Phragmoplast

 

in higher plants, a formation that arises between the daughter nuclei during cell division and that consists of microtubules, ducts of the endoplasmic network, and tiny pectin granules. In the equatorial plane of the phragmoplast there occurs an aggregation of bubbles, probably derivatives of the Golgi complex, which develop into a cellular septum, that is, a membrane that becomes the cell wall. Cellulose is deposited on both sides of the wall. Gradually, as the cell wall is formed, the phragmoplast moves toward the periphery of the mother cell and continues to function until there is closure of the newly formed cell wall with the membrane of the mother cell.

phragmoplast


phrag·mo·plast

(frag'mō-plast), Barrel-shaped enlargement of the spindle associated with formation of the new cell membrane during telophase in plant cells. [G. phragma, hedge, enclosure, + plassō, to form]
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更新时间:2025/2/25 4:50:31