Department of Botany and Microbiology, University College, Gower Street, WC1E 6BT, London.
Planta. 1979 Oct;146(5):597-601. doi: 10.1007/BF00388838.
Vacuoles formed by the invagination of the inner membrane of the nuclear envelope have been observed during meiotic prophase in a wide range of plants. In the angiosperm Lycopersicon their formation was found to coincide with the completion of synaptonemal complex formation, and this timing is analogous to that observed during this stage in the silkworm Bombyx. The implications of this activity in relation to the process of chromosome movement are discussed. In the gymnosperm Pinus, the heterosporous fern Marsilea and homosporous ferns Pteridium and Dryopteris the formation of nuclear vacuoles begins much earlier, coinciding with the condensation of chromatin during leptotene. They enlarge and become more elaborate as meiosis proceeds, and may eventually become detached from the nuclear envelope. It is therefore thought unlikely that theyfulfil functions connected with chromosome movement in the manner proposed for the silkworm and the tomato. During diplotene/diakinesis they contain electron-opaque granules and fibrils, and the possible origin and significance of this material is discussed.
在广泛的植物中，已观察到核膜内膜内陷形成的液泡在减数分裂前期。在被子植物番茄中，发现它们的形成与联会复合体形成的完成同时发生，这一时间与在蚕 Bombyx 中观察到的这个阶段相似。讨论了这种活动与染色体运动过程的关系。在裸子植物松、异型孢子蕨类植物满江红和同型孢子蕨类植物蕨类植物和水龙骨中，核液泡的形成开始得更早，与细线期染色质的浓缩同时发生。随着减数分裂的进行，它们会增大并变得更加复杂，最终可能会与核膜分离。因此，它们不太可能像在蚕和番茄中提出的那样，以与染色体运动相关的方式发挥作用。在二价体/终变期中，它们含有电子不透明的颗粒和纤维，并且讨论了这种物质的可能起源和意义。
