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Maritime pine ( Pinus pinaster Aiton) and Saharan cypress ( Cupressussempervirens L. var. dupreziana [A. Camus] Silba) are twocone-bearing seed coniferous woody plants. The chemical composition oftheir essential oils, isolated from needles and leaves byhydrodistillation, was analyzed with gas chromatography (GC) and gaschromatography mass spectrometry (GC/MS). A total of 66 and 28compounds were identified, which represented 99.5% and 98.9% of totalpine and cypress oils, respectively. Pinus pinaster oil was found to berich in α-pinene (31.4%), (Z)-caryophyllene (28%), andα-humulene (6.7%); it was characterized by relatively high amountsof monoterpene and sesquiterpene hydrocarbons (44.5% and 46.3%,respectively). The major components identified in cypress oil weremanoyl oxide (34.7%), α-pinene (31.8%), α-humulene (9%), and6-3-carene (8.7%). Results of in vitro antifungal test assays showedthat both oils significantly inhibit the growth of 10 plant pathogenicfungi. Herbicidal effects of the oils on seed germination, seed vigor,and seedling growth of three common crop weeds Sinapis arvensis L.,Phalaris paradoxa L., and Raphanus raphanistrum L. were alsodetermined; the oils completely inhibited seed germination and seedlinggrowth of all the weeds.

chilean journal of agricultural research

Comparative study of two coniferous species (Pinus pinaster Aiton and Cupressus sempervirens L. var. dupreziana [A. Camus] Silba) essential oils: Chemical composition and biological activity