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Linoleic acid — The nematicidal principle of several nematophagous fungi and its production in trap-forming submerged cultures

Linoleic acid — The nematicidal principle of several nematophagous fungi and its production in... 203 160 160 5 5 Marc Stadler Heidrun Anke Olov Sterner Lehrbereich Biotechnologie der Universität Kaiserslautern Paul-Ehrlich-Strasse 23 D-67663 Kaiserslautern Gernany Department of Organic Chemistry 2, Chemical Center University of Lund POB 124 S-22100 Lund Sweden Abstract Linoleic acid was shown to be the only detectable nematicidal agent in the mycelial extracts of several predacious fungi of the genus Arthrobotrys . Although the compound is present in saprophytic cultures, induction of trap formation by nematodes or phenylalnyl-valine caused a significant increase in its production. In submerged cultures, the number of traps formed by Arthrobotrys conoides and Arthrobotrys oligospora was directly correlated to the increase of the concentration of linoleic acid. In A. conoides , the ratio of ergosterol to linoleic acid decreased from 2.6 in saprophytic cultures to 1.1 in trap-forming cultures induced with nematodes. Linoleic acid exhibited nematicidal activities towards the free-living nematode Caenorhabditis elegans with an LD 50 value of 5 μg/ml. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Archives of Microbiology Springer Journals

Linoleic acid — The nematicidal principle of several nematophagous fungi and its production in trap-forming submerged cultures

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References (13)

Publisher
Springer Journals
Copyright
Copyright © 1993 by Springer-Verlag
Subject
Life Sciences; Biotechnology; Biochemistry, general; Cell Biology; Ecology; Microbial Ecology; Microbiology
ISSN
0302-8933
eISSN
1432-072X
DOI
10.1007/BF00252228
Publisher site
See Article on Publisher Site

Abstract

203 160 160 5 5 Marc Stadler Heidrun Anke Olov Sterner Lehrbereich Biotechnologie der Universität Kaiserslautern Paul-Ehrlich-Strasse 23 D-67663 Kaiserslautern Gernany Department of Organic Chemistry 2, Chemical Center University of Lund POB 124 S-22100 Lund Sweden Abstract Linoleic acid was shown to be the only detectable nematicidal agent in the mycelial extracts of several predacious fungi of the genus Arthrobotrys . Although the compound is present in saprophytic cultures, induction of trap formation by nematodes or phenylalnyl-valine caused a significant increase in its production. In submerged cultures, the number of traps formed by Arthrobotrys conoides and Arthrobotrys oligospora was directly correlated to the increase of the concentration of linoleic acid. In A. conoides , the ratio of ergosterol to linoleic acid decreased from 2.6 in saprophytic cultures to 1.1 in trap-forming cultures induced with nematodes. Linoleic acid exhibited nematicidal activities towards the free-living nematode Caenorhabditis elegans with an LD 50 value of 5 μg/ml.

Journal

Archives of Microbiology – Springer Journals

Published: Nov 1, 1993

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