Nuclear division in the marine dinoflagellate Oxyrrhis marina

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	Nuclear division in the marine dinoflagellate Oxyrrhis marina
	Gao XP; Li JY
	1986
发表期刊	JOURNAL OF CELL SCIENCE
卷号	85 期号:X 页码:161-175
合作性质	其它
摘要	The nuclear division of Oxyrrhis marina is a very distinct one among the mitoses of dinoflagellates that have been studies. Using synchronized populations, we have investigated the ultrastructural changes in this nuclear division. In interphase, nuclei can be classified into two groups on the basis of the shapes of the chromosomes. Y- and U-shaped chromosomes have been observed in both types of interphase nuclei. By prophase the nucleus becomes oval, many nuclear plaques appear on the nuclear envelope, and many microtubules radiate from these nuclear plaques within the nucleus. Metaphase can be identified by the characteristic arrangement of the chromosomes; an equatorial metaphase plate is absent. As in many higher organisms, anaphase includes two stages: anaphase A and anaphase B. During anaphase A the nucleus does not apparently elongate and the chromosomes migrate towards the poles by a combination of the shortening of the chromosome-associated microtubules and the elongation of those located between daughter chromosomes. During anaphase B the nucleus elongates to about twice its former length. This elongation may result from growth of the interzonal nuclear envelope. Dividing nucleoli are associated with microtubules, which suggests that microtubules may play an active role in the division of the nucleolus. The evolution of mitosis and the phylogenetic relationships between Oxyrrhis, typical dinoflagellates and Syndinium are discussed.
关键词	Dinoflagellida Cytology Microscopy Electron Mitosis
收录类别	SCI
语种	英语
文献类型	期刊论文
条目标识符	http://ir.kiz.ac.cn/handle/152453/10682
专题	其他
作者单位	Kunming Institute of Zoology, Chinese Academy of Sciences, Yunnan
推荐引用方式 GB/T 7714	Gao XP,Li JY. Nuclear division in the marine dinoflagellate Oxyrrhis marina[J]. JOURNAL OF CELL SCIENCE,1986,85(X):161-175.
APA	Gao XP,&Li JY.(1986).Nuclear division in the marine dinoflagellate Oxyrrhis marina.JOURNAL OF CELL SCIENCE,85(X),161-175.
MLA	Gao XP,et al."Nuclear division in the marine dinoflagellate Oxyrrhis marina".JOURNAL OF CELL SCIENCE 85.X(1986):161-175.

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