Isolation of a Tetrahymena thermophila Strain which Induced Metaphase I Meiotic Arrest: New Pathway of Abortive Conjugation
. A hypodiploid strain of Tetrahymena thermophila has been obtained that shows arrest at the stage of condensed nuclei, corresponding to metaphase I of normal conjugates and induced arrest at meiotic metaphase I (i.e. at the stage of condensed, bivalent chromosomes) in its wt partner mate. The metap...
Ausführliche Beschreibung
Gespeichert in:
| Autor*in: |
KACZANOWSKI, ANDRZEJ [verfasserIn] KIERSNOWSKA, MAURYLA [verfasserIn] KACZANOWSKA, JANINA [verfasserIn] |
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| Format: |
E-Artikel |
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| Erschienen: |
Oxford, UK: Blackwell Publishing Ltd ; 2004 |
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| Schlagwörter: |
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| Umfang: |
Online-Ressource |
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| Reproduktion: |
2005 ; Blackwell Publishing Journal Backfiles 1879-2005 |
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| Übergeordnetes Werk: |
In: The journal of eukaryotic microbiology - Oxford [u.a.] : Wiley-Blackwell, 1954, 51(2004), 3, Seite 0 |
| Übergeordnetes Werk: |
volume:51 ; year:2004 ; number:3 ; pages:0 |
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| DOI / URN: |
10.1111/j.1550-7408.2004.tb00579.x |
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NLEJ243270852 |
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| 520 | |a . A hypodiploid strain of Tetrahymena thermophila has been obtained that shows arrest at the stage of condensed nuclei, corresponding to metaphase I of normal conjugates and induced arrest at meiotic metaphase I (i.e. at the stage of condensed, bivalent chromosomes) in its wt partner mate. The metaphase I arrested conjugants retained their old macronuclei and most of them underwent cell fusion, instead of separation of exconjugants. The doublets were viable and cortically integrated. When the arrest inducing strain was crossed to the haploid tester strain, the haploid micronuclei were arrested in the meiotic metaphase I as the diploid ones had been; the monovalent, chromosomes were condensed, the arms of sister chromatids were not separated, and they were not segregated. Separation of the arms of sister chromatids and disjunction of bivalent chromosomes were not prerequisite for the formation of micro-tubular spindles in those cells that were arrested in meiotic metaphase I. After re-feeding, the doublet cells resumed cell divisions, segregating two macronuclei and micronuclei at random. One macronucleus was derived from the arrest inducing strain and the other from the tester strain. Heterokaryon strains with macronuclei derived from the parental arrest inducing strain and with the micronucleus derived from the parental wt tester strain were obtained. Surprisingly, these heterokaryons did not induce meiotic arrest. Thus, the arrest in the meiotic metaphase I was induced by the micronucleus and not by the macronucleus of the arrest inducing strain. | ||
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10.1111/j.1550-7408.2004.tb00579.x doi (DE-627)NLEJ243270852 DE-627 ger DE-627 rakwb KACZANOWSKI, ANDRZEJ verfasserin aut Isolation of a Tetrahymena thermophila Strain which Induced Metaphase I Meiotic Arrest: New Pathway of Abortive Conjugation Oxford, UK Blackwell Publishing Ltd 2004 Online-Ressource nicht spezifiziert zzz rdacontent nicht spezifiziert z rdamedia nicht spezifiziert zu rdacarrier . A hypodiploid strain of Tetrahymena thermophila has been obtained that shows arrest at the stage of condensed nuclei, corresponding to metaphase I of normal conjugates and induced arrest at meiotic metaphase I (i.e. at the stage of condensed, bivalent chromosomes) in its wt partner mate. The metaphase I arrested conjugants retained their old macronuclei and most of them underwent cell fusion, instead of separation of exconjugants. The doublets were viable and cortically integrated. When the arrest inducing strain was crossed to the haploid tester strain, the haploid micronuclei were arrested in the meiotic metaphase I as the diploid ones had been; the monovalent, chromosomes were condensed, the arms of sister chromatids were not separated, and they were not segregated. Separation of the arms of sister chromatids and disjunction of bivalent chromosomes were not prerequisite for the formation of micro-tubular spindles in those cells that were arrested in meiotic metaphase I. After re-feeding, the doublet cells resumed cell divisions, segregating two macronuclei and micronuclei at random. One macronucleus was derived from the arrest inducing strain and the other from the tester strain. Heterokaryon strains with macronuclei derived from the parental arrest inducing strain and with the micronucleus derived from the parental wt tester strain were obtained. Surprisingly, these heterokaryons did not induce meiotic arrest. Thus, the arrest in the meiotic metaphase I was induced by the micronucleus and not by the macronucleus of the arrest inducing strain. 2005 Blackwell Publishing Journal Backfiles 1879-2005 |2005|||||||||| Cell fusion KIERSNOWSKA, MAURYLA verfasserin aut KACZANOWSKA, JANINA verfasserin aut In The journal of eukaryotic microbiology Oxford [u.a.] : Wiley-Blackwell, 1954 51(2004), 3, Seite 0 Online-Ressource (DE-627)NLEJ243927622 (DE-600)2126326-7 1550-7408 nnns volume:51 year:2004 number:3 pages:0 http://dx.doi.org/10.1111/j.1550-7408.2004.tb00579.x text/html Verlag Deutschlandweit zugänglich Volltext GBV_USEFLAG_U ZDB-1-DJB GBV_NL_ARTICLE AR 51 2004 3 0 |
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10.1111/j.1550-7408.2004.tb00579.x doi (DE-627)NLEJ243270852 DE-627 ger DE-627 rakwb KACZANOWSKI, ANDRZEJ verfasserin aut Isolation of a Tetrahymena thermophila Strain which Induced Metaphase I Meiotic Arrest: New Pathway of Abortive Conjugation Oxford, UK Blackwell Publishing Ltd 2004 Online-Ressource nicht spezifiziert zzz rdacontent nicht spezifiziert z rdamedia nicht spezifiziert zu rdacarrier . A hypodiploid strain of Tetrahymena thermophila has been obtained that shows arrest at the stage of condensed nuclei, corresponding to metaphase I of normal conjugates and induced arrest at meiotic metaphase I (i.e. at the stage of condensed, bivalent chromosomes) in its wt partner mate. The metaphase I arrested conjugants retained their old macronuclei and most of them underwent cell fusion, instead of separation of exconjugants. The doublets were viable and cortically integrated. When the arrest inducing strain was crossed to the haploid tester strain, the haploid micronuclei were arrested in the meiotic metaphase I as the diploid ones had been; the monovalent, chromosomes were condensed, the arms of sister chromatids were not separated, and they were not segregated. Separation of the arms of sister chromatids and disjunction of bivalent chromosomes were not prerequisite for the formation of micro-tubular spindles in those cells that were arrested in meiotic metaphase I. After re-feeding, the doublet cells resumed cell divisions, segregating two macronuclei and micronuclei at random. One macronucleus was derived from the arrest inducing strain and the other from the tester strain. Heterokaryon strains with macronuclei derived from the parental arrest inducing strain and with the micronucleus derived from the parental wt tester strain were obtained. Surprisingly, these heterokaryons did not induce meiotic arrest. Thus, the arrest in the meiotic metaphase I was induced by the micronucleus and not by the macronucleus of the arrest inducing strain. 2005 Blackwell Publishing Journal Backfiles 1879-2005 |2005|||||||||| Cell fusion KIERSNOWSKA, MAURYLA verfasserin aut KACZANOWSKA, JANINA verfasserin aut In The journal of eukaryotic microbiology Oxford [u.a.] : Wiley-Blackwell, 1954 51(2004), 3, Seite 0 Online-Ressource (DE-627)NLEJ243927622 (DE-600)2126326-7 1550-7408 nnns volume:51 year:2004 number:3 pages:0 http://dx.doi.org/10.1111/j.1550-7408.2004.tb00579.x text/html Verlag Deutschlandweit zugänglich Volltext GBV_USEFLAG_U ZDB-1-DJB GBV_NL_ARTICLE AR 51 2004 3 0 |
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10.1111/j.1550-7408.2004.tb00579.x doi (DE-627)NLEJ243270852 DE-627 ger DE-627 rakwb KACZANOWSKI, ANDRZEJ verfasserin aut Isolation of a Tetrahymena thermophila Strain which Induced Metaphase I Meiotic Arrest: New Pathway of Abortive Conjugation Oxford, UK Blackwell Publishing Ltd 2004 Online-Ressource nicht spezifiziert zzz rdacontent nicht spezifiziert z rdamedia nicht spezifiziert zu rdacarrier . A hypodiploid strain of Tetrahymena thermophila has been obtained that shows arrest at the stage of condensed nuclei, corresponding to metaphase I of normal conjugates and induced arrest at meiotic metaphase I (i.e. at the stage of condensed, bivalent chromosomes) in its wt partner mate. The metaphase I arrested conjugants retained their old macronuclei and most of them underwent cell fusion, instead of separation of exconjugants. The doublets were viable and cortically integrated. When the arrest inducing strain was crossed to the haploid tester strain, the haploid micronuclei were arrested in the meiotic metaphase I as the diploid ones had been; the monovalent, chromosomes were condensed, the arms of sister chromatids were not separated, and they were not segregated. Separation of the arms of sister chromatids and disjunction of bivalent chromosomes were not prerequisite for the formation of micro-tubular spindles in those cells that were arrested in meiotic metaphase I. After re-feeding, the doublet cells resumed cell divisions, segregating two macronuclei and micronuclei at random. One macronucleus was derived from the arrest inducing strain and the other from the tester strain. Heterokaryon strains with macronuclei derived from the parental arrest inducing strain and with the micronucleus derived from the parental wt tester strain were obtained. Surprisingly, these heterokaryons did not induce meiotic arrest. Thus, the arrest in the meiotic metaphase I was induced by the micronucleus and not by the macronucleus of the arrest inducing strain. 2005 Blackwell Publishing Journal Backfiles 1879-2005 |2005|||||||||| Cell fusion KIERSNOWSKA, MAURYLA verfasserin aut KACZANOWSKA, JANINA verfasserin aut In The journal of eukaryotic microbiology Oxford [u.a.] : Wiley-Blackwell, 1954 51(2004), 3, Seite 0 Online-Ressource (DE-627)NLEJ243927622 (DE-600)2126326-7 1550-7408 nnns volume:51 year:2004 number:3 pages:0 http://dx.doi.org/10.1111/j.1550-7408.2004.tb00579.x text/html Verlag Deutschlandweit zugänglich Volltext GBV_USEFLAG_U ZDB-1-DJB GBV_NL_ARTICLE AR 51 2004 3 0 |
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10.1111/j.1550-7408.2004.tb00579.x doi (DE-627)NLEJ243270852 DE-627 ger DE-627 rakwb KACZANOWSKI, ANDRZEJ verfasserin aut Isolation of a Tetrahymena thermophila Strain which Induced Metaphase I Meiotic Arrest: New Pathway of Abortive Conjugation Oxford, UK Blackwell Publishing Ltd 2004 Online-Ressource nicht spezifiziert zzz rdacontent nicht spezifiziert z rdamedia nicht spezifiziert zu rdacarrier . A hypodiploid strain of Tetrahymena thermophila has been obtained that shows arrest at the stage of condensed nuclei, corresponding to metaphase I of normal conjugates and induced arrest at meiotic metaphase I (i.e. at the stage of condensed, bivalent chromosomes) in its wt partner mate. The metaphase I arrested conjugants retained their old macronuclei and most of them underwent cell fusion, instead of separation of exconjugants. The doublets were viable and cortically integrated. When the arrest inducing strain was crossed to the haploid tester strain, the haploid micronuclei were arrested in the meiotic metaphase I as the diploid ones had been; the monovalent, chromosomes were condensed, the arms of sister chromatids were not separated, and they were not segregated. Separation of the arms of sister chromatids and disjunction of bivalent chromosomes were not prerequisite for the formation of micro-tubular spindles in those cells that were arrested in meiotic metaphase I. After re-feeding, the doublet cells resumed cell divisions, segregating two macronuclei and micronuclei at random. One macronucleus was derived from the arrest inducing strain and the other from the tester strain. Heterokaryon strains with macronuclei derived from the parental arrest inducing strain and with the micronucleus derived from the parental wt tester strain were obtained. Surprisingly, these heterokaryons did not induce meiotic arrest. Thus, the arrest in the meiotic metaphase I was induced by the micronucleus and not by the macronucleus of the arrest inducing strain. 2005 Blackwell Publishing Journal Backfiles 1879-2005 |2005|||||||||| Cell fusion KIERSNOWSKA, MAURYLA verfasserin aut KACZANOWSKA, JANINA verfasserin aut In The journal of eukaryotic microbiology Oxford [u.a.] : Wiley-Blackwell, 1954 51(2004), 3, Seite 0 Online-Ressource (DE-627)NLEJ243927622 (DE-600)2126326-7 1550-7408 nnns volume:51 year:2004 number:3 pages:0 http://dx.doi.org/10.1111/j.1550-7408.2004.tb00579.x text/html Verlag Deutschlandweit zugänglich Volltext GBV_USEFLAG_U ZDB-1-DJB GBV_NL_ARTICLE AR 51 2004 3 0 |
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10.1111/j.1550-7408.2004.tb00579.x doi (DE-627)NLEJ243270852 DE-627 ger DE-627 rakwb KACZANOWSKI, ANDRZEJ verfasserin aut Isolation of a Tetrahymena thermophila Strain which Induced Metaphase I Meiotic Arrest: New Pathway of Abortive Conjugation Oxford, UK Blackwell Publishing Ltd 2004 Online-Ressource nicht spezifiziert zzz rdacontent nicht spezifiziert z rdamedia nicht spezifiziert zu rdacarrier . A hypodiploid strain of Tetrahymena thermophila has been obtained that shows arrest at the stage of condensed nuclei, corresponding to metaphase I of normal conjugates and induced arrest at meiotic metaphase I (i.e. at the stage of condensed, bivalent chromosomes) in its wt partner mate. The metaphase I arrested conjugants retained their old macronuclei and most of them underwent cell fusion, instead of separation of exconjugants. The doublets were viable and cortically integrated. When the arrest inducing strain was crossed to the haploid tester strain, the haploid micronuclei were arrested in the meiotic metaphase I as the diploid ones had been; the monovalent, chromosomes were condensed, the arms of sister chromatids were not separated, and they were not segregated. Separation of the arms of sister chromatids and disjunction of bivalent chromosomes were not prerequisite for the formation of micro-tubular spindles in those cells that were arrested in meiotic metaphase I. After re-feeding, the doublet cells resumed cell divisions, segregating two macronuclei and micronuclei at random. One macronucleus was derived from the arrest inducing strain and the other from the tester strain. Heterokaryon strains with macronuclei derived from the parental arrest inducing strain and with the micronucleus derived from the parental wt tester strain were obtained. Surprisingly, these heterokaryons did not induce meiotic arrest. Thus, the arrest in the meiotic metaphase I was induced by the micronucleus and not by the macronucleus of the arrest inducing strain. 2005 Blackwell Publishing Journal Backfiles 1879-2005 |2005|||||||||| Cell fusion KIERSNOWSKA, MAURYLA verfasserin aut KACZANOWSKA, JANINA verfasserin aut In The journal of eukaryotic microbiology Oxford [u.a.] : Wiley-Blackwell, 1954 51(2004), 3, Seite 0 Online-Ressource (DE-627)NLEJ243927622 (DE-600)2126326-7 1550-7408 nnns volume:51 year:2004 number:3 pages:0 http://dx.doi.org/10.1111/j.1550-7408.2004.tb00579.x text/html Verlag Deutschlandweit zugänglich Volltext GBV_USEFLAG_U ZDB-1-DJB GBV_NL_ARTICLE AR 51 2004 3 0 |
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isolation of a tetrahymena thermophila strain which induced metaphase i meiotic arrest: new pathway of abortive conjugation |
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Isolation of a Tetrahymena thermophila Strain which Induced Metaphase I Meiotic Arrest: New Pathway of Abortive Conjugation |
| abstract |
. A hypodiploid strain of Tetrahymena thermophila has been obtained that shows arrest at the stage of condensed nuclei, corresponding to metaphase I of normal conjugates and induced arrest at meiotic metaphase I (i.e. at the stage of condensed, bivalent chromosomes) in its wt partner mate. The metaphase I arrested conjugants retained their old macronuclei and most of them underwent cell fusion, instead of separation of exconjugants. The doublets were viable and cortically integrated. When the arrest inducing strain was crossed to the haploid tester strain, the haploid micronuclei were arrested in the meiotic metaphase I as the diploid ones had been; the monovalent, chromosomes were condensed, the arms of sister chromatids were not separated, and they were not segregated. Separation of the arms of sister chromatids and disjunction of bivalent chromosomes were not prerequisite for the formation of micro-tubular spindles in those cells that were arrested in meiotic metaphase I. After re-feeding, the doublet cells resumed cell divisions, segregating two macronuclei and micronuclei at random. One macronucleus was derived from the arrest inducing strain and the other from the tester strain. Heterokaryon strains with macronuclei derived from the parental arrest inducing strain and with the micronucleus derived from the parental wt tester strain were obtained. Surprisingly, these heterokaryons did not induce meiotic arrest. Thus, the arrest in the meiotic metaphase I was induced by the micronucleus and not by the macronucleus of the arrest inducing strain. |
| abstractGer |
. A hypodiploid strain of Tetrahymena thermophila has been obtained that shows arrest at the stage of condensed nuclei, corresponding to metaphase I of normal conjugates and induced arrest at meiotic metaphase I (i.e. at the stage of condensed, bivalent chromosomes) in its wt partner mate. The metaphase I arrested conjugants retained their old macronuclei and most of them underwent cell fusion, instead of separation of exconjugants. The doublets were viable and cortically integrated. When the arrest inducing strain was crossed to the haploid tester strain, the haploid micronuclei were arrested in the meiotic metaphase I as the diploid ones had been; the monovalent, chromosomes were condensed, the arms of sister chromatids were not separated, and they were not segregated. Separation of the arms of sister chromatids and disjunction of bivalent chromosomes were not prerequisite for the formation of micro-tubular spindles in those cells that were arrested in meiotic metaphase I. After re-feeding, the doublet cells resumed cell divisions, segregating two macronuclei and micronuclei at random. One macronucleus was derived from the arrest inducing strain and the other from the tester strain. Heterokaryon strains with macronuclei derived from the parental arrest inducing strain and with the micronucleus derived from the parental wt tester strain were obtained. Surprisingly, these heterokaryons did not induce meiotic arrest. Thus, the arrest in the meiotic metaphase I was induced by the micronucleus and not by the macronucleus of the arrest inducing strain. |
| abstract_unstemmed |
. A hypodiploid strain of Tetrahymena thermophila has been obtained that shows arrest at the stage of condensed nuclei, corresponding to metaphase I of normal conjugates and induced arrest at meiotic metaphase I (i.e. at the stage of condensed, bivalent chromosomes) in its wt partner mate. The metaphase I arrested conjugants retained their old macronuclei and most of them underwent cell fusion, instead of separation of exconjugants. The doublets were viable and cortically integrated. When the arrest inducing strain was crossed to the haploid tester strain, the haploid micronuclei were arrested in the meiotic metaphase I as the diploid ones had been; the monovalent, chromosomes were condensed, the arms of sister chromatids were not separated, and they were not segregated. Separation of the arms of sister chromatids and disjunction of bivalent chromosomes were not prerequisite for the formation of micro-tubular spindles in those cells that were arrested in meiotic metaphase I. After re-feeding, the doublet cells resumed cell divisions, segregating two macronuclei and micronuclei at random. One macronucleus was derived from the arrest inducing strain and the other from the tester strain. Heterokaryon strains with macronuclei derived from the parental arrest inducing strain and with the micronucleus derived from the parental wt tester strain were obtained. Surprisingly, these heterokaryons did not induce meiotic arrest. Thus, the arrest in the meiotic metaphase I was induced by the micronucleus and not by the macronucleus of the arrest inducing strain. |
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| title_short |
Isolation of a Tetrahymena thermophila Strain which Induced Metaphase I Meiotic Arrest: New Pathway of Abortive Conjugation |
| url |
http://dx.doi.org/10.1111/j.1550-7408.2004.tb00579.x |
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| author2 |
KIERSNOWSKA, MAURYLA KACZANOWSKA, JANINA |
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| doi_str |
10.1111/j.1550-7408.2004.tb00579.x |
| up_date |
2024-07-06T04:54:20.011Z |
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