Antipodal symmetry and asymmetry in the embryo sac of Avena sativa L.

  • Romuald Kosina Plant Speciation Group, Institute of Environmental Biology, University of Wroclaw, Przybyszewskiego 63-77, 51-148 Wroclaw, Poland
  • Joanna Krawczyk Plant Speciation Group, Institute of Environmental Biology, University of Wroclaw, Przybyszewskiego 63-77, 51-148 Wroclaw, Poland

Abstract

Inter- and intra-antipodal variation is presented for a free-nucleolar developmental stadium in the Avena sativa endosperm. Antipodals of common oat are uni- or multinuclear. Multinuclear antipodals, in a single cell, show nuclei of the same mitotic stage, but this is different for various antipodals. Examples of DNA amplification and anomalies occurring during mitosis are provided.

References

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Nuclear antipodal morphology at the free-nuclear endosperm stage in Avena sativa: A – two multinuclear (2 and 5 nuclei) antipodals (arrows) showing the different levels of ploidy and phase of the cell cycle; B – two uninuclear antipodals (arrows) with various DNA amplification and, probably, at a different stage of prophase; C – a highly polyploidised antipodal cell at prophase stage with two groups of laggard chromosomes (arrows); D – a partly apoptotised antipodal nucleus (white arrow) and semi-telophase of a small nucleus (remnant DNA) perhaps was formed from the laggard chromosomes (see green arrow). Other nuclei, not from antipodals, are marked by green dots. A-D – DAPI and propidium iodide sequential staining.
Published
2016-10-01
How to Cite
KOSINA, Romuald; KRAWCZYK, Joanna. Antipodal symmetry and asymmetry in the embryo sac of Avena sativa L.. Modern Phytomorphology, [S.l.], v. 10, n. Suppl., p. 13-15, oct. 2016. ISSN 2227-9555. Available at: <http://ojs.phytomorphology.org/index.php/MP/article/view/3>. Date accessed: 27 apr. 2017. doi: https://doi.org/10.5281/zenodo.159037.
Section
Correspondences

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