Effect of Monoterpenes on Lipid Composition and Sclerotial Development of

E. I. LUCINI; M. P. ZUNINO; M. L. LÓPEZ; J. A. ZYGADLO

JOURNAL OF PHYTOPATHOLOGY-PHYTOPATHOLOGISCHE ZEITSCHRIFT

WILEY-BLACKWELL PUBLISHING, INC

Año: 2006 vol. 154 p. 441 - 446

0931-1785

Monoterpenes have antifungal activity on pathogenic fungi. The purpose of this study was to examine the effect of seven monoterpenes on phospholipid and sterol composition of Sclerotium cepivorum Berk as well as lipid peroxidation of mycelia and sclerotia development. Most of the monoterpenes increased the ergosterol content with a consequent diminution in the phospholipid/sterol ratio. This ratio was significantly decreased by the thymol treatment. When the fungus was grown in the presence of thymol or borneol, the saturated fatty acid content and the lipid peroxides were increased, concomitant with an increase of the sclerotial diameter. These results indicate that thymol and borneol may be promoting generation of lipid  peroxides. Sclerotial differentiation was retarded mainly by camphor, 1,8-cineole, linalool and menthol.Sclerotium cepivorum Berk as well as lipid peroxidation of mycelia and sclerotia development. Most of the monoterpenes increased the ergosterol content with a consequent diminution in the phospholipid/sterol ratio. This ratio was significantly decreased by the thymol treatment. When the fungus was grown in the presence of thymol or borneol, the saturated fatty acid content and the lipid peroxides were increased, concomitant with an increase of the sclerotial diameter. These results indicate that thymol and borneol may be promoting generation of lipid  peroxides. Sclerotial differentiation was retarded mainly by camphor, 1,8-cineole, linalool and menthol.