Temat: chromosome structure - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: Structure and functions of lampbrush chromosomes
Autorzy:: Andraszek, K.
Smalec, E.
Powiązania:: https://bibliotekanauki.pl/articles/81204.pdf
Data publikacji:: 2011
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:: lampbrush chromosome
oocyte
transcriptional activity
physiological process
morphological structure
cytogenetic technique
in situ hybridization
DNA replication
cytogenetic investigation
karyotype evolution
genome mapping
meiotic chromosome
Źródło:: BioTechnologia. Journal of Biotechnology Computational Biology and Bionanotechnology; 2011, 92, 4
0860-7796
Pojawia się w:: BioTechnologia. Journal of Biotechnology Computational Biology and Bionanotechnology
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 2.

Tytuł:: Morphological, karyological and molecular characteristics of Festuca arietina Klok. – a neglected psammophilous species of the Festuca valesiaca agg. from Eastern Europe
Autorzy:: Bednarska, Iryna
Kostikov, Igor
Tarieiev, Andrii
Stukonis, Vaclovas
Powiązania:: https://bibliotekanauki.pl/articles/952033.pdf
Data publikacji:: 2017
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:: : festuca arietina
anatomy
morphology
taxonomy
its
secondary structure
chromosome number
Opis:: Until recently, Festuca arietina was practically an unknown species in the flora of Eastern Europe. Such a situation can be treated as a consequence of insufficient studying of Festuca valesiaca group species in Eastern Europe and misinterpretation of the volume of some taxa. As a result of a complex study of F. arietina populations from the territory of Ukraine (including the material from locus classicus), Belarus and Lithuania, original anatomy, morphology and molecular data were obtained. These data confirmed the taxonomical status of F. arietina as a separate species. Eleven morphological and 12 anatomical characters, ITS1-5.8S-ITS2 cluster of nuclear ribosomal genes, as well as the models of secondary structure of ITS1 and ITS2 transcripts were studied in this approach. It was found for the first time that F. arietina is hexaploid (6x = 42), which is distinguished from all the other narrow-leaved fescues by specific leaf anatomy as well as in ITS1-5.8S-ITS2 sequences. Molecular data indicating possible hybridogenous origin of F. arietina, fall in line with the anatomical-morphological data and explain the tendency toward sclerenchyma strands fusion with formation of a continuous ring in F. arietina, as well as F. arietina ecological confinement to psammophyte biotopes.
Źródło:: Acta Biologica Cracoviensia. Series Botanica; 2017, 59, 1
0001-5296
Pojawia się w:: Acta Biologica Cracoviensia. Series Botanica
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 3.

Tytuł:: Brachypodium distachyon – a model plant to study grass genome structure, dynamics and evolution
Autorzy:: Idziak, D.
Hasterok, R.
Betekhtin, A.
Borowska-Zuchowska, N.
Braszewska-Zalewska, A.
Chwialkowska, K.
Gorkiewicz, R.
Kus, A.
Kwasniewska, J.
Kwasniewski, M.
Robaszkiewicz, E.
Siwinska, D.
Wolny, E.
Chrominski, K.
Tkacz, M.
Powiązania:: https://bibliotekanauki.pl/articles/951271.pdf
Data publikacji:: 2015
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:: Brachypodium distachyon
model plant
grass
genome structure
Expressed Sequence Tag programme
fluorescent in situ hybridization
chromosome painting
DNA methylation
Źródło:: BioTechnologia. Journal of Biotechnology Computational Biology and Bionanotechnology; 2015, 96, 1
0860-7796
Pojawia się w:: BioTechnologia. Journal of Biotechnology Computational Biology and Bionanotechnology
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 4.

Tytuł:: The effect of mono- and divalent cations on Tetrahymena thermophila telomeric repeat fragment. A photon correlation spectroscopy study.
Autorzy:: Włodarczyk, Agnieszka
Patkowski, Adam
Grzybowski, Przemysław
Dobek, Andrzej
Powiązania:: https://bibliotekanauki.pl/articles/1041510.pdf
Data publikacji:: 2004
Wydawca:: Polskie Towarzystwo Biochemiczne
Tematy:: chromosome ends
G-quadruplex
telomeric DNA
photon correlation spectroscopy
structure transition
Opis:: The structure of the Tetrahymena thermophila telomeric sequence d(TGGGGT)4 was studied by photon correlation spectroscopy (PCS) in aqueous solution in the presence of NaCl, KCl and SrCl2. The sample studied was polydisperse in all conditions studied. Translational diffusion coefficients DT describing the diffusion modes observed were determined. On the basis of a comparison between the experimental DT values with those calculated assuming the bead model, two forms were identified as telomeric quadruplex structures: monomer and tetramer. In the presence of SrCl2 formation of aggregates was observed, with a size that reached several micrometres. The relative weighted concentrations of the structures observed for different concentrations of a salt and DNA were determined. The results obtained in the presence of monovalent ions were qualitatively similar and could be presented in a coherent plot in which the concentration of salt was expressed by the number of ions per DNA molecule. A large number of ions per DNA molecule favoured tetramer formation while a small number favoured the monomer form. A structural phase transition from the monomer to the tetramer induced by a change in the number of ions per DNA molecule was observed. The main difference between the results for Na+ and K+ was a greater effectiveness of the K+ ions in formation of tetramers. The effect of Sr2+ ions on the structures formed was different than that of the monovalent ions. The results obtained in the presence of Sr2+ could not be described as a function of the number of ions per DNA molecule.
Źródło:: Acta Biochimica Polonica; 2004, 51, 4; 971-981
0001-527X
Pojawia się w:: Acta Biochimica Polonica
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 5.

Tytuł:: DNA replication stress-induced biphasic nuclear structures in Allium cepa root meristem cells
Autorzy:: Zabka, A.
Polit, J.T.
Maszewski, J.
Powiązania:: https://bibliotekanauki.pl/articles/951326.pdf
Data publikacji:: 2013
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:: conference
DNA replication
cyclin-dependent kinase
cell division
biphasic nuclear structure
Allium cepa
root meristem cell
premature chromosome condensation
Źródło:: BioTechnologia. Journal of Biotechnology Computational Biology and Bionanotechnology; 2013, 94, 3
0860-7796
Pojawia się w:: BioTechnologia. Journal of Biotechnology Computational Biology and Bionanotechnology
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 6.

Tytuł:: Plant regeneration from immature inflorescence-derived callus of Italian ryegrass [Lolium multiflorum Lam.]: chromosome number and fertility of regenerated plants
Autorzy:: Zwierzykowski, Z
Rybczynski, J.J.
Powiązania:: https://bibliotekanauki.pl/articles/2044256.pdf
Data publikacji:: 1998
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:: chromosome structure
plant regeneration
female fertility
callus culture
chromosome number
meiotic behaviour
Italian rye-grass
breeding method
callus induction
plant breeding
Lolium multiflorum
immature inflorescence
Opis:: Twenty field-grown genotypes of diploid Italian ryegrass (Lolium multiflorum Lam., 2n = 2x = 14) were tested for their ability to induce callus and regenerate plants. Callus cultures were initiated from segments of immature inflorescences cultured on the MS medium supplemented with 4.0 mg L⁻¹ 2,4-D. The calluses were subcultured first on the maintaining medium (MS medium with 2.0 mg L⁻¹ 2,4-D) and later on the rooting medium (MS medium with 0.2 mg L⁻¹ 2,4-D). The frequency of callus induction varied depending on the source of explant and the initial genotype. A total of 473 green plantlets were regenerated, of which 420 were established in the soil. All these plants had the morphological characteristics of Italian ryegrass. Among 372 regenerants analysed cytologically, 302 (81.2%) had the expected diploid chromosome number (2n = 2x= 14), 65 (17.5%) were tetraploid (2n = 4x = 28); several aneuploids and mixoploids were also observed. All diploid and tetraploid regenerants were male and female fertile. However, a great variation of female fertility within and between both groups of regenerants was observed.
Źródło:: Journal of Applied Genetics; 1998, 39, 3; 217-224
1234-1983
Pojawia się w:: Journal of Applied Genetics
Dostawca treści:: Biblioteka Nauki

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