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Planta Med 1979; 35(3): 262-269
DOI: 10.1055/s-0028-1097214
Research Articles

© Georg Thieme Verlag Stuttgart · New York

Electron Microscopic Investigations on Internal Glandular Hairs of Dryopteris Ferns

I: General Observations on Hair Structure and Excrete AccumulationA. Huurre †, A. Huhtikangas, C.–J. Widén1
  • Department of Pharmacognosy, University of Helsinki, Finland.
1 Present address: Department of Pharmaceutical Chemistry, University of Kuopio, Finland.
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Publikationsdatum:
13. Januar 2009 (online)

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Abstract

The structure of internal glands in the rhizomes of Dryopteris assimilis S. Walker is investigated by electron microscopy. The anthelmintically active phloroglucinol derivatives are biosynthesized in the glandular cytoplast and subsequently excreted through the plasmalemma and the cell wall to be accumulated under the cuticle as constituents of a subcuticular excretion layer. Some of the final reaction steps in the biosythesis of these compounds are possibly associated with the excretion process.

Key Word Index

Dryopteris - Aspidiaceae - Glandular Hairs - Electron Microscopy - Phloroglucinols - Triglycerides