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Biologia




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Volume 65, Issue 6

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Differentiation of the pollen size in five representatives of Taraxacum sect. Palustria

Jolanta Marciniuk / Aleksandra Grabowska-Joachimiak
  • Cytogenetics Group in the Department of Plant Breeding and Seed Science, University of Agriculture in Cracow, Łobzowska 24, 31-140, Cracow, Poland
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/ Paweł Marciniuk
Published Online: 2010-10-15 | DOI: https://doi.org/10.2478/s11756-010-0107-6

Abstract

Measurements of the pollen size in 5 species of Taraxacum sect. Palustria at three levels of ploidy: 2n = 3x = 24 (T. paucilobum), 2n = 4x = 32 (T. vindobonense, T. trilobifolium), 2n = 5x = 40 (T. mendax) and one taxon of unknown number of chromosomes 2n = ? (T. portentosum) are presented in this paper. Obtained results indicate a lack of distinct positive correlation between the pollen size and ploidy in the studied group of plants. Distinct relationship was, however, found between ploidy and the range of pollen size and shape variability. Most variable were the pollen grains of triploid T. paucilobum and the least — those in pentaploid T. mendax. Ranges of pollen variability in tetraploid T. trilobifolium and T. vindobonense and in T. portentosum of unknown number of chromosomes showed intermediate values.

Keywords: Taraxacum sect. Palustria; pollen size; polyploid series

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About the article

Published Online: 2010-10-15

Published in Print: 2010-12-01


Citation Information: Biologia, Volume 65, Issue 6, Pages 954–957, ISSN (Online) 1336-9563, ISSN (Print) 0006-3088, DOI: https://doi.org/10.2478/s11756-010-0107-6.

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© 2010 Slovak Academy of Sciences. This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License. BY-NC-ND 3.0

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