Centromere behavior during interphase and meiotic prophase in Allium fistulosum from 3-D, E.M. reconstruction

Church, Kathleen; Møens, Peter B.

doi:10.1007/bf00293189

Cited by 76 publications

(47 citation statements)

References 27 publications

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“…As the interphase cell advances, the heterochromatic regions of the centromeric ring aggregate to form 5-7 centromeric structures. Similar aggregation of centromeric regions in mitotic and meiotic interphase nuclei has been reported in Allium fis tulosum Moens 1976, Moens andChurch 1977). In some of the in terphase cells a few C-bands could be seen in the central gap of the centromeric ring.…”

Section: Centromeric Ringsupporting

confidence: 82%

“…At vari ous stages of mitotic cell cycle in this species , the C-band regions form a ring-like configuration showing thereby that anaphase-telophase orientation of chromosomes is maintained at interphase and even till late prophase . Previous data on cytology (Avivi and Feldman 1980), autoradiography (Fussell 1975), electron microscopy (Church and Moens 1976) and banding (Stack and Clark 1974, Fussell 1977, Ghosh and Roy 1977, Tanaka and Tanaka 1977, Lavania and Sharma 1980b) studies on a variety of plants show that interphase chromosomes retain their telophase arrange ment. However, Hsu et al (1971) found that position of centromeres in the in terphase nucleus of Mus musculus varied from tissue to tissue .…”

Section: Discussionmentioning

confidence: 93%

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Centromeric ring and arrangement of centromeres in interphase of Lathyrus sphaericus as detected by C-banding.

Lavania

Sharma

1984

CYTOLOGIA

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Section: Centromeric Ringsupporting

confidence: 82%

Section: Discussionmentioning

confidence: 93%

Centromeric ring and arrangement of centromeres in interphase of Lathyrus sphaericus as detected by C-banding.

Lavania

Sharma

1984

CYTOLOGIA

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“…Interestingly, in the PTH system of Oenothera, pericentromeric regions also remain clustered and generate Rabl-polarisation for a prolonged time during meiotic prophase I, but these features are likely to appear de novo before zygotene (GOLCZYK et al 2008a). In other organisms studied, the transient centromere associations are usually resolved prior to zygotene pairing (CHURCH and MOENS 1976;SUZUKI et al 1997, JIN et al 1998.…”

Section: Discussionmentioning

confidence: 99%

The arrangement of pericentromeres during meiotic prophase I in the permanent translocation heterozygoteRhoeo spathacea

Golczyk

2011

Caryologia

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-A study on the organization of prophase I chromatin in a PTH (permanent translocation heterozygosity) plant -Rhoeo spathacea was carried out. The sequential DAPI/AMD-FISH technique showed that nuclear polarization and centromere clustering during preleptotene-pachytene is a striking feature of all the studied heterozygotic clones. It was revealed that during pachytene pericentromeric heterochromatins assemble into a strikingly regular continuous ring with empty space inside. The topological constraints exerted by the heterochromatic pachytene "ring" exclude both random and multiple centromere interactions, and together with peripheral disposition of GC-rich pericentromeric regions and their reduced number, conform to a condition where one pericentromere interacts side-by-side with its two neighbors. The relation of the meiotic centromere associations in Rhoeo to the processes regulating chromosome arm juxtaposition (e.g. synapsis) and/or segregation was discussed.

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“…Three-dimensional reconstruction of microsporocyte nuclei from electron micrographs of serial thin sections in Allium fistulosum, Lilium speciosum, Ornithogalum virens, wheat, rye (Secale cereale L.), and triticale (X Triticosecale Wittmack) showed polarization of centromeres opposite the telomeres but were not conclusive in establishing whether presynapstic centromere association was based on homology (Church and Moens 1976;Bennett et al 1979;Church 1981;Delfosse and Church 1981). A fluorescence in situ hybridization (FISH) analysis of chromosome arrangement in hexaploid wheat showed that centromeres associate prior to meiosis, usually in pairs (Aragó n-Alcaide et al 1997; Martínez-Pérez et al 1999).…”

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confidence: 99%

Terminal Regions of Wheat Chromosomes Select Their Pairing Partners in Meiosis

et al. 2007

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Many plant species, including important crops like wheat, are polyploids that carry more than two sets of genetically related chromosomes capable of meiotic pairing. To safeguard a diploid-like behavior at meiosis, many polyploids evolved genetic loci that suppress incorrect pairing and recombination of homeologues. The Ph1 locus in wheat was proposed to ensure homologous pairing by controlling the specificity of centromere associations that precede chromosome pairing. Using wheat chromosomes that carry rye centromeres, we show that the centromere associations in early meiosis are not based on homology and that the Ph1 locus has no effect on such associations. Although centromeres indeed undergo a switch from nonhomologous to homologous associations in meiosis, this process is driven by the terminally initiated synapsis. The centromere has no effect on metaphase I chiasmate chromosome associations: homologs with identical or different centromeres, in the presence and absence of Ph1, pair the same. A FISH analysis of the behavior of centromeres and distal chromomeres in telocentric and biarmed chromosomes demonstrates that it is not the centromeric, but rather the subtelomeric, regions that are involved in the correct partner recognition and selection.

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Centromere behavior during interphase and meiotic prophase in Allium fistulosum from 3-D, E.M. reconstruction

Cited by 76 publications

References 27 publications

Centromeric ring and arrangement of centromeres in interphase of Lathyrus sphaericus as detected by C-banding.

Centromeric ring and arrangement of centromeres in interphase of Lathyrus sphaericus as detected by C-banding.

The arrangement of pericentromeres during meiotic prophase I in the permanent translocation heterozygoteRhoeo spathacea

Terminal Regions of Wheat Chromosomes Select Their Pairing Partners in Meiosis

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