Zygospore germination and meiosis in Closterium ehrenbergii Meneghini (Conjugatophyceae)
Zygospore germination and meiosis in Closterium ehrenbergii Meneghini (Conjugatophyceae)
复制标题
新月藻 (Conjugatophyceae) 中接合孢子的萌发和减数分裂
DOI：
10.2216/i0031-8884-22-3-267.1
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发表时间：
1983
期刊：
影响因子：
1.6
通讯作者：
T. Ichimura
中科院分区：
文献类型：
--
作者：
F. Kasai;T. Ichimura
摘要利用同一交配群的多个无性系，研究了新月藻接合孢子的萌发和减数分裂过程。接合孢子萌发的第一个标志是接合孢子变绿。此后，萌发小泡通过破裂的接合孢子壁释放到周围的培养基中;这在黑暗和光照时期都发生。两个质体，在刚刚释放的囊泡的一侧可见，首先分开，然后再次靠近彼此，可能伴随着细胞质运动。当泡囊体积减小时，细胞质分裂产生一对角，每个角包含一个质体。减数分裂开始于绿色接合孢子，完成于萌发泡。在减数分裂末期，两个非姐妹核败育。一个存活的核和一个败育的核与一个质体结合在一起。新月藻具有大量的杆状染色体和至少两条长染色体。
Abstract The processes of zygospore germination and meiosis in Closterium ehrenbergii Meneghini are reported, utilizing several clones of the same mating group. The first sign of zygospore germination is the greening of the zygospore. Thereafter the germination vesicle is released through the ruptured zygospore wall into the surrounding medium; this occurs in the dark as well as in the light period. The two plastids, visible on one side of the vesicle just released, first move apart and then come closer to each other again, probably accompanied by cytoplasmic movement. As the vesicular volume reduces, a cytoplasmic cleavage progresses to produce a pair of gones, each containing one plastid. Meiosis begins in the greening zygospore and is completed in the germination vesicle. At the end of meiosis two non-sister nuclei abort. One surviving nucleus and one aborting one are incorporated in each gone with one plastid. Closterium ehrenbergii has a great number of rod-like chromosomes and at least two long acro...