Non-Rabl patterns of centromere and telomere distribution in the interphase nuclei of plant cells
Non-Rabl patterns of centromere and telomere distribution in the interphase nuclei of plant cells
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DOI：
10.1023/a:1009280425125
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发表时间：
1998-11-01
影响因子：
2.6
通讯作者：
Jiang, JM
中科院分区：
文献类型：
--
作者：
Dong, FG;Jiang, JM
在细胞分裂后期，分裂的染色体向两极移动，着丝粒为头，端粒为尾。着丝粒和端粒的这种极化取向被认为在间期中被保留，并且被称为Rabl模型。分析了几种植物间期核中着丝粒和端粒的分布。虽然在小麦、黑麦、大麦和燕麦中观察到Rabl极性，但在高粱、水稻和玉米中发现了非Rabl模式。在non-Rabl模式，着丝粒和端粒分散在整个间期核，除了在由核仁占据的区域。分生根尖细胞、小孢子母细胞和分化叶细胞的间期核中，Rabl和non-Rabl的着丝粒和端粒分布模式一致。我们的研究表明，有一个间期染色质组织的多样性和经典的RabI模型是不普遍的植物物种。
At the anaphase of cell divisions, the divided chromosomes move to the two poles, with the centromeres as heads and telomeres as tails. Such a polarized orientation of centromeres and telomeres is believed to be preserved in the interphase and is known as Rabl model. We analyzed the distributions of centromeres and telomeres in interphase nuclei from several plant species. Although Rabl polarity was observed in wheat, rye, barley and oats, non-Rabl patterns were discovered in sorghum, rice and maize. In the non-Rabl patterns, both centromeres and telomeres were dispersed throughout the interphase nucleus, except in the area occupied by the nucleolus. Both Rabl and non-Rabl distribution patterns of centromeres and telomeres were consistent in interphase nuclei derived from meristematic root tip cells, microspore mother cells and differentiated leaf cells. Our study demonstrated that there is a diversity of interphase chromatin organization and that the classical RabI model is not universal in plant species.