Evaluation of Propiophenone, 4-Methylacetophenone and 2',4'-Dimethylacetophenone as Phytotoxic Compounds of Labdanum Oil from L.

This is the first study to evaluate the phytotoxic activity of three phenolic compounds present in the essential oil of the labdanum of , an allelopathic species of the Mediterranean ecosystem. Propiophenone, 4'-methylacetophenone, and 2',4'-dimethylacetophenone slightly inhibit total germination and radicle growth of , and they strongly delay germination and reduce hypocotyl size. On the other hand, the inhibition effect of these compounds on was stronger on total germination than on germination rate, and radicle length compared to hypocotyl size.

Phytotoxic Activity of -Cresol, 2-Phenylethanol and 3-Phenyl-1-Propanol, Phenolic Compounds Present in L.

Numerous studies about the leaf exudate of highlight this Mediterranean shrub as an allelopathic species. Despite the very high diversity of secondary metabolites identified in its labdanum, only a few components have been evaluated. -Cresol, 2-phenylethanol and 3-phenyl-1-propanol are three phenolic components present in the labdanum of whose role has not been specified to date.

Seasonal Variation of Cistus ladanifer L. Diterpenes.

The exudate of Cistus ladanifer L. consists mainly of two families of secondary metabolites: flavonoids and diterpenes. The amount of flavonoids present in the leaves has a marked seasonal variation, being maximum in summer and minimum in winter.