Ultrastructure of meiosis in Chlamydomonas reinhardtii
Ultrastructure of meiosis in Chlamydomonas reinhardtii
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莱茵衣藻减数分裂的超微结构
DOI：
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发表时间：
1977
期刊：
影响因子：
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通讯作者：
R. Brown
中科院分区：
文献类型：
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作者：
R. Triemer;R. Brown
介绍了莱茵衣藻减数分裂的超微结构细节。受精卵在减数分裂前有一个静息期，在此期间有多层受精卵壁沉积。基生体在间期重新出现。在间期细胞核中不可见异染色质。瘦素的特征是轴向核的出现和染色质的凝结。在早期合子期，与凝聚染色质相关的轴向元件与核膜相关。管状细胞出现在与相关染色体相邻的核周间隙。二价体开始与核仁结合。通过粗线素，形成了典型的突触复合物。突触复合物具有两个与染色体相关的横向元件，并由约130 nm的中心空间分开。中心元件可以形成在侧面元件之间的中间，并通过横向元件与它们连接。分离的突触复合体在细胞质中通过二倍体作用出现。在th…
Ultrastructural details of meiosis in Chlamydomonas reinhardtii are presented. Zygotes undergo a resting stage prior to meiosis, during which a multi-layered zygote wall is deposited. Basal bodies reappear at interphase. Heterochromatin is not visible in the interphase nucleus. Leptotene is characterized by the appearance of axial cores and the condensation of chromonemata. By early zygotene, axial elements associated with the condensing chromatin associate with the nuclear envelope. Tubular elements appear in the perinuclear space adjacent to the associated chromosomes. Bivalents begin to associate with the nucleolus. By pachytene, typical synaptinemal complexes have formed. The synaptinemal complexes possess two lateral elements associated with the chromosomes and separated by a central space of about 130 nm. A central element may form midway between the lateral elements and be joined to them via transverse elements. Separated synaptinemal complexes appear in the cytoplasm by diplotene-diakinesis. At th...