TELOPHASE SEGREGATION OF CHROMOSOMES AND AMITOSIS
Cases of "distributive c-mitosis" (the term does not mean that colchicine has been used) in plant endosperm are described, in which the chromosomes of metaphase type (two-chromatid chromosomes) are distributed at random because of phragmoplast activity in a process similar to non-disjunct...
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| Format: | Online |
| Language: | English |
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The Rockefeller University Press
1965
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| Online Access: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2106614/ |
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pubmed-2106614 |
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oai_dc |
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pubmed-21066142008-05-01 TELOPHASE SEGREGATION OF CHROMOSOMES AND AMITOSIS Molè-Bajer, J. Contemporary Papers Cases of "distributive c-mitosis" (the term does not mean that colchicine has been used) in plant endosperm are described, in which the chromosomes of metaphase type (two-chromatid chromosomes) are distributed at random because of phragmoplast activity in a process similar to non-disjunction. There is some evidence that chromosmal fibres can be formed within the phragmoplast under special circumstances; during "distributive c-mitosis" some kinetochores show active movements due to cooperation with chromosomal fibres formed in the phragmoplast; while other chromosomes, as indicated by their arrangements and shape, are moved without any activity of kinetochores. Some components of the phragmoplast have the fastest movements occurring in mitosis. Some cases are described in which the phragmoplast divides telophase and interphase nuclei into two or more groups and moves the pieces a considerable distance apart. In a similar way, the phragmoplast may divide newly formed restitution nuclei. This phenomenon leads to a reduction of chromosome numbers, and the course of the process itself is reminiscent of amitosis. The Rockefeller University Press 1965-04-01 /pmc/articles/PMC2106614/ /pubmed/14342832 Text en Copyright © 1965 by The Rockefeller Institute Press This article is distributed under the terms of an Attribution–Noncommercial–Share Alike–No Mirror Sites license for the first six months after the publication date (see http://www.rupress.org/terms). After six months it is available under a Creative Commons License (Attribution–Noncommercial–Share Alike 4.0 Unported license, as described at http://creativecommons.org/licenses/by-nc-sa/4.0/). |
| repository_type |
Open Access Journal |
| institution_category |
Foreign Institution |
| institution |
US National Center for Biotechnology Information |
| building |
NCBI PubMed |
| collection |
Online Access |
| language |
English |
| format |
Online |
| author |
Molè-Bajer, J. |
| spellingShingle |
Molè-Bajer, J. TELOPHASE SEGREGATION OF CHROMOSOMES AND AMITOSIS |
| author_facet |
Molè-Bajer, J. |
| author_sort |
Molè-Bajer, J. |
| title |
TELOPHASE SEGREGATION OF CHROMOSOMES AND AMITOSIS |
| title_short |
TELOPHASE SEGREGATION OF CHROMOSOMES AND AMITOSIS |
| title_full |
TELOPHASE SEGREGATION OF CHROMOSOMES AND AMITOSIS |
| title_fullStr |
TELOPHASE SEGREGATION OF CHROMOSOMES AND AMITOSIS |
| title_full_unstemmed |
TELOPHASE SEGREGATION OF CHROMOSOMES AND AMITOSIS |
| title_sort |
telophase segregation of chromosomes and amitosis |
| description |
Cases of "distributive c-mitosis" (the term does not mean that colchicine has been used) in plant endosperm are described, in which the chromosomes of metaphase type (two-chromatid chromosomes) are distributed at random because of phragmoplast activity in a process similar to non-disjunction. There is some evidence that chromosmal fibres can be formed within the phragmoplast under special circumstances; during "distributive c-mitosis" some kinetochores show active movements due to cooperation with chromosomal fibres formed in the phragmoplast; while other chromosomes, as indicated by their arrangements and shape, are moved without any activity of kinetochores. Some components of the phragmoplast have the fastest movements occurring in mitosis. Some cases are described in which the phragmoplast divides telophase and interphase nuclei into two or more groups and moves the pieces a considerable distance apart. In a similar way, the phragmoplast may divide newly formed restitution nuclei. This phenomenon leads to a reduction of chromosome numbers, and the course of the process itself is reminiscent of amitosis. |
| publisher |
The Rockefeller University Press |
| publishDate |
1965 |
| url |
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2106614/ |
| _version_ |
1611409018848280576 |