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Effects of cyclopropenoid fatty acids on fungal growth and lipid composition
Author(s) -
Schmid Katherine M.,
Patterson Glenn W.
Publication year - 1988
Publication title -
lipids
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.601
H-Index - 120
eISSN - 1558-9307
pISSN - 0024-4201
DOI - 10.1007/bf02535466
Subject(s) - composition (language) , elaidic acid , stearate , fusarium oxysporum , sterol , glyceride , hypha , biology , fatty acid , urea , food science , chemistry , biochemistry , botany , cholesterol , organic chemistry , philosophy , linguistics , linoleic acid
Cyclopropenoid fatty acids (CPE) isolated from Sterculia foetida oil by urea clathration and reverse phase high performance liquid chromatography (HPLC) were introduced into fungal cultures. Stearate levels in phospholipids and triacylglycerols from Ustilago maydis sporidia rose considerably in response to 30 μM CPE. In addition, CPE themselves were incorporated into glycerolipid fractions. Sterol composition was unaffected. Changes in lipid composition were accompanied by inhibition of dry weight accumulation and sporidial number. Treated sporidia showed irregular wall deposition and a branched morphology. Oleate alleviated CPE effects on growth and morphology. Hyphal extension by Rhizoctonia solani was inhibited somewhat by 30 μM sterculate, while Fusarium oxysporum showed no appreciable response. Although CPE appeared to inhibit fatty acid desaturation by F. oxysporum , gross increases in the proportion of stearate were limited to the triacylglycerol fraction during 30 μM treatments. The possibility that the CPE synthesized by plants serve as antifungal agents is discussed.