The Cytology of Xanthisma texanum D. C. III. Differential Somatic Reduction

The Cytology of Xanthisma texanum D. C. III. Differential Somatic Reduction

1. Supernumerary chromosomes are present in all the cells of the young embryo up to the late spherical stage. 2. At the transition from the late spherical stage to the heart-shaped embryo root and shoot tissues are differentiated. 3. In the cells of the root tissue the supernumerary chromosomes are...

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Veröffentlicht in:Bulletin of the Torrey Botanical Club 1955-09, Vol.82 (5), p.377-382
Hauptverfasser: Berger, C. A., McMahon, R. M., Witkus, E. R.
Format: Artikel
Sprache:eng
Schlagworte:
Chromosomes
Cytology
Diploidy
Embryos
Germ cells
Mother cells
Plant roots
Plants
Ploidies
Somatic cells
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Zusammenfassung:1. Supernumerary chromosomes are present in all the cells of the young embryo up to the late spherical stage. 2. At the transition from the late spherical stage to the heart-shaped embryo root and shoot tissues are differentiated. 3. In the cells of the root tissue the supernumerary chromosomes are eliminated and are seen as micronuelei in the cytoplasm. 4. Elimination is brought about by lagging of the supernumeraries at mitosis.
ISSN:0040-9618
2325-8055
DOI:10.2307/2482483