Structure and chemical content of the trichomes in two Doronicum species (Asteraceae)

  • Olga V. Kostina Laboratory of Plant Anatomy and Morphology, Komarov Botanical Institute of Russian Academy of Sciences, Prof. Popov str. 2, 197376 St. Petersburg, Russia
  • Lyudmila E. Muravnik Laboratory of Plant Anatomy and Morphology, Komarov Botanical Institute of Russian Academy of Sciences, Prof. Popov str. 2, 197376 St. Petersburg, Russia
DOI: https://doi.org/10.5281/zenodo.161021

Abstract

Non-glandular and three types of glandular trichomes localized on a peduncle and the phyllaries of two species (Doronicum orientale and D. macrophyllum) belonging to Senecioneae tribe of Asteraceae were studied by light and electron microscopy, as well as on histochemistry. The plant species differ on the trichome morphology, anatomy and arrangement. Three types of the glandular trichomes are formed on the vegetative and reproductive organs in D. orientale, whereas only one type exists in D. macrophyllum. It was shown by fluorescent microscopy and histochemistry that the phenolic substances, terpenoids and sesquiterpene lactones present in the glandular trichomes. The received results allow assuming that secretion of the trichomes is a chemical barrier to insects and fungi.

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Fig. 1. Morphological types of the glandular and non-glandular trichomes in Doronicum orientale (А-В, Е) and D. macrophyllum (Г, Д): А – 1st-type trichome; Б – 2nd-type trichome; В – 3rd-type trichome; Г – 2-celled trichome; Д – common view of the phyllary edge; Е – a simple non-glandular trichome. Scale bars: А-Г, Е – 50 µm; Д – 200 µm.
Published
2014-04-01
How to Cite
KOSTINA, Olga V.; MURAVNIK, Lyudmila E.. Structure and chemical content of the trichomes in two Doronicum species (Asteraceae). Modern Phytomorphology, [S.l.], v. 5, p. 167-171, apr. 2014. ISSN 2227-9555. Available at: <http://ojs.phytomorphology.org/index.php/MP/article/view/209>. Date accessed: 11 apr. 2018. doi: https://doi.org/10.5281/zenodo.161021.
Citation Formats
Issue
Vol 5 (2014)
Section
Research Articles
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