| 释义 |
phragmoplast Bot.|ˈfrægməʊplɑːst, -æ-|
[a. G. phragmoplast (L. Errera 1888, in Bot. Centralbl. XXXIV. 397), f. Gr. ϕράγµ-α fence, screen: see -o and -plast.]
A set of fibrils which appears during mitosis in some plant cells as a barrel-shaped structure joining the two sets of chromosomes after their separation to the poles and which lasts until the formation of the cell plate.
1912W. H. Lang tr. Strasburger's Text-bk. Bot. (ed. 4) 89 A barrel-shaped figure, the phragmoplast, is formed, which either separates entirely from the developing daughter nuclei, or remains in connection with them by means of a peripheral sheath. 1941Amer. Jrnl. Bot. XXVIII. 227/2 In late anaphase or during telophase the phragmoplast extends laterally and a cell plate is formed across the cell. 1976A. W. Davidson in M. M. Yeoman Cell Division in Higher Plants xii. 419 The phragmoplast, which heralds cell plate formation, appears at the equator of the mitotic spindle and moves centrifugally outwards along the phragmosome.
Hence phragmoˈplastic a.
1952A. Hughes Mitotic Cycle iv. 147 This form of cytokinesis..is really a variety of the phragmoplastic method. 1953K. Esau Plant Anat. iii. 62 Phragmoplastic fibers appearing at the margins of the cell plate. |