Changes in the composition of phospholipid fatty acids and sterols of maize root in response to monoterpenes

Terpenes are thought to be important in plant-plant interactions because of their phytotoxic action on seed germination and growth. Herein, the effects of five volatile monoterpenes on root sterols and phospholipid fatty acid (PLFA) composition have been studied during maize seedling germination. Th...

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Bibliographic Details
Published in:Journal of chemical ecology 2005-07, Vol.31 (6), p.1269-1283
Main Authors: Zunino, M.P, Aygadlo, J.A
Format: Article
Language:English
Subjects:
allelopathy
Animal and plant ecology
Animal, plant and microbial ecology
Applied ecology
Autoecology
Biological and medical sciences
Cell Membrane - chemistry
Cell Membrane - metabolism
Corn
Ecotoxicology, biological effects of pollution
Fatty acids
Fatty Acids - analysis
Fundamental and applied biological sciences. Psychology
General aspects
Germination - physiology
Lipids
Monoterpenes
Monoterpenes - chemistry
Monoterpenes - classification
Monoterpenes - pharmacology
monoterpenoids
Phospholipids - analysis
phytosterols
phytotoxicity
Plant Roots - chemistry
Plant Roots - drug effects
roots
Seed germination
Seedlings
Seedlings - drug effects
Seedlings - growth & development
Sterols - analysis
Time Factors
Zea mays
Zea mays - chemistry
Zea mays - drug effects
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Summary:Terpenes are thought to be important in plant-plant interactions because of their phytotoxic action on seed germination and growth. Herein, the effects of five volatile monoterpenes on root sterols and phospholipid fatty acid (PLFA) composition have been studied during maize seedling germination. The investigated monoterpenes (camphor, 1-8 cineole, geraniol, menthol, and thymol) were applied at their respective IC80 (concentration causing 80% inhibition). They quantitatively affected free sterols and PLFA composition, thus producing an increase in the percentage of unsaturated PLFAs, stigmasterol of the free sterol fraction, and saturated steryl ester fatty acids. Alcoholic and nonalcoholic monoterpenes appeared to have different modes of action. The former affected unsaturated fatty acid and stigmasterol to a greater extent, and accordingly they could interfere in seedling growth by changes in the membrane lipids.
ISSN:0098-0331
1573-1561
DOI:10.1007/s10886-005-5285-2