| 释义 |
leptonema, n. Cytol.|lɛptəʊˈniːmə|
[a. F. leptonema (coined by V. Grégoire 1907, in La Cellule XXIV. 371): see lepto-, *-nema.]
= leptotene n.
1911Q. Jrnl. Microsc. Sci. LVII. 8 For the various stages of the prophase I have used the nomenclature now generally adopted, based on that proposed by von Winiwarter in his work on mammalian oögenesis. The stages run: leptonema, zygonema, pachynema, strepsinema or diplonema (adjectives leptotene, zygotene, etc.), and diakinesis. 1924L. Doncaster Introd. Study Cytol. v. 67 The early stage of the primary spermatocyte, when the nucleus contains a network of thin threads, is called leptonema. 1971Chromosoma XXXV. 11 Nuclei of cells in leptonema fixed within one half hour after being placed into culture characteristically contained condensed chromatin attached to a less dense fibrous core. 1984Cytologia XLIX. 88 Sporocytes in a single anther were in meiotic stages from leptonema to pollen development. |