Open AccessStructures of Heracleum sosnovskii Manden. stem and leaves releasing photodermatosis-causing substances
Author(s) -
Elżbieta Weryszko-Chmielewska,
Mirosława Chwil
Publication year - 2012
Publication title -
acta agrobotanica
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.4
H-Index - 9
eISSN - 2300-357X
pISSN - 0065-0951
DOI - 10.5586/aa.2014.057
Subject(s) - trichome , secretion , epidermis (zoology) , botany , phototoxicity , biology , fluorescence , fluorescence microscope , microbiology and biotechnology , chemistry , biochemistry , anatomy , in vitro , physics , quantum mechanics
In its stems and leaves, Heracleum sosnovskii Manden. contains furanocoumarins, which exert a phototoxic effect on humans. The aim of the investigations was to describe the external secretory structures of the epidermis and internal secretory tissues in organs responsible for emission of secretion that is toxic to human skin. The study was conducted using light and fluorescence microscopy. On the stems and leaves, various types of secretory trichomes with dispersed or deposited secretion were found. The trichomes were most abundant on the abaxial leaf surface. Epidermal cells and the secretion present on the trichomes exhibited intense fluorescence, which may indicate the presence of furanocoumarins in the tissue and trichome secretions