María Laura López

Essential oil of Baccharis cordobensis Heering

The essential oil of the aerial parts of Baccharis cordobensis was examined by GC and GC–MS. The major constituents were trans-nerolidol (15.8%), T-cadinol (14.7%) and cubenol (8.8%). Copyright

Essential Oil Composition of Baccharis tenella Hook. Et Arn.

Abstract The essential oil of Baccharis tenella Hook. et Arn. leaves collected from the Llanos Region (La Rioja) was analyzed by GC and GC/MS. Spathulenol was the major component (29.4%) of the oil.

Tagetone Induces Changes in Lipid Composition of Panicum Miliaceum L. Roots

Abstract Terpenes are thought to be important in plant-plant interactions, because of their phytotoxic action on seed germination and growth. Despite of some efforts in studying the mode of action of terpenes at molecular level, little is known about their effect on plant lipid composition. Here, we demonstrate the ability of tagetone to inhibit the root growth of Panicum miliaceum L. seedlings, which was related with changes in sterols, alkanes and fatty acids composition. Some sterol and fatty acid ratios are discussed in relation to their function. The results suggest that tagetone exert their effect through impairing the structural and functional properties of root membrane.

Aromatic Plants of Yungas. Part II. Chemical Composition of the Essential Oil of Phoebe porphyria (Griseb.) Mez. (Lauraceae)

Abstract The essential oil of Phoebe porphyria (Griseb.) Mez. (Lauraceae) collected from northwestern Argentina (Yungas area) was analyzed by GC/MS. Twenty-five components were characterized, representing 87.0% of the total components detected. 1,8-Cineole (10.5%), β-caryophyllene (19.3%) and spathulenol (17.1%) were the major constituents of the oil, which was obtained in 0.15% yield.