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The coniferous tree, Tetraclinis articulata (Vahl) Masters, commonly known as Barbary thuya is endemic to the westernMediterranean areas. Its woods, mainly root burl, were very appreciated by artisans for their natural beauty, homogeneityand good quality destined for marquetry and furniture. Use of essential oils (EOs) of this species opens a second way forvalorization in many fields as bioactive agents. EOs were extracted, by hydrodistillation from sawdust and leaves samplesoriginated from two thuya populations, and analyzed by GC-MS. Yields of EOs varied greatly depending on biomass typeand samples origin. EOs of leaves are dominated by monoterpens, and contain ?-pinene, camphor, and bornyl acetate asmajor compounds. Those of woods are however rich in sesquiterpens, and contain 3-tera-butyl-4-methoxyphenol, thymol,cedrol, and ?-cedrene as major compounds. Antifungal bioassay, by direct contact in malt-agar medium, of these EOsconducted on four wood decaying fungi, showed that root burl wood EOs possess the best antifungal inhibitory powerrelated to their richness in phenols (above 64%), followed by those of trunk wood; while leaves EOs showed, however aless antifungal activity. Such antifungal potency of wood thuya EOs allows us to recommend the use of these oils extractedfrom sawdust as preservative agents for less durable woods.

Chemical Variability and Antifungal Activity of Tetraclinis articulata (Vahl) Masters Woods and Leaves Essential Oils Against Wood Decaying Fungi