Chemical contents of stinging trichomes of Cnidoscolus texanus
Received: 14 January 1991 Accepted: 28 May 1991 DOI:
Cite this article as: Lookadoo, S.E. & Pollard, A.J. J Chem Ecol (1991) 17: 1909. doi:10.1007/BF00993737 Abstract
Plants known as nettles bear trichomes that deliver a painful sting when touched. Studies of members of the Urticaceae have suggested that their trichomes may contain histamine, acetylcholine, and serotonin. We report investigations using TLC, HPLC, and UV-VIS spectrophotometry to analyze the hair fluids of
Cnidoscolus texanus, a member of the Euphorbiaceae, along with standards of known histamine, acetylcholine, and serotonin. Of these, only serotonin was detected in hair extracts. Up to four other compounds were detected and partially characterized, but they have not been identified. Key Words Serotonin nettles trichomes stinging hairs plant defense mechanisms Urtica dioica Cnidoscolus texanus References
1956. Identification of 5-hydroxytryptamine in the sting of the nettle (
Br. J. Pharmacol.
Cordeiro, R., Aragao, J.
1983. The presence of histamine in
An. Acad. Brasil. Cienc.
1947. The mechanism of the sting of the common nettle (
1949. Distribution of acetylcholine and histamine in nettle plants.
1927. Uber die chemische Natur der Nesselgifte.
Z. Gesamte Exp. Med.
1914. The poisonous nature of the stinging hairs of
1963. The stinging properties of Laportea.
1970. Purification of pain-producing substances from
Dendrocnide (Laportea) moroides
1986. Variation in
in relation to herbivory.
1984. Genecological studies of
L. III. Stinging hairs and plant-herbivore interactions.
1957. Pain-producing substances from the stinging bush
Aust. J. Exp. Biol. Med. Sci.
1974. Morphology, fine structure, and ontogeny of the stinging emergence of
Am. J. Bot.
1969. The morphology and toxicology of plant stinging hairs.
1969. Toxic constituents of the stinging nettle. M.S. thesis. Iowa State University, Ames, Iowa.
1922. Die Urticaceen Papuasiens.
Google Scholar Copyright information
© Plenum Publishing Corporation 1991