Details

Title

Ovule Structure of Scotch thistle Onopordum acanthium L. (Cynareae, Asteraceae)

Journal title

Acta Biologica Cracoviensia s. Botanica

Yearbook

2016

Numer

No 1

Publication authors

Divisions of PAS

Nauki Biologiczne i Rolnicze

Abstract

<jats:title>Abstract</jats:title> <jats:p>Studies concerning the ultrastructure of the periendothelial zone integumentary cells of Asteraceae species are scarce. The aim was to check whether and/or what kinds of integument modifications occur in <jats:italic>Onopordum acanthium</jats:italic>. Ovule structure was investigated using light microscopy, scanning electron microscopy, transmission electron microscopy and histochemistry. For visualization of calcium oxalate crystals, the polarizing microscopy was used. The periendothelial zone of integument in <jats:italic>O. acanthium</jats:italic> is well developed and composed of mucilage cells near the integumentary tapetum and large, highly vacuolated cells at the chalaza and therefore they differ from other integumentary cells. The cells of this zone lack starch and protein bodies. Periendothelial zone cells do not have calcium oxalate crystals, in contrast to other integument cells. The disintegration of periendothelial zone cells was observed in a mature ovule. The general ovule structure of <jats:italic>O. acanthium</jats:italic> is similar to other members of the subfamily Carduoideae, although it is different to “Taraxacum”, “Galinsoga” and “Ratibida” ovule types.</jats:p>

Publisher

Biological Commission of the Polish Academy of Sciences – Cracow Branch

Date

2016

Identifier

ISSN 0001-5296 ; eISSN 1898-0295

References

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DOI

10.1515/abcsb-2016-0001

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