Chemical composition of essential oils isolated from leaves, twigs, roots and cones of Vietnamese <i>Keteleeria evelyniana</i> Mast

Thai, Tran Huy; Hiền, Nguyễn Thị; Cuòng, Nguyễn Thế; Casanova, Joseph; Tomi, Félix; Paoli, Mathieu

doi:10.1080/10412905.2022.2036643

Cited by 2 publications

(1 citation statement)

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“…In particular, the two major components of J. communis and L. decidua EOs were α -pinene or sabinene, which were also found in other Juniperus [ 23 , 24 ] and Larix species [ 17 , 25 , 26 ]. Nevertheless, qualitative and/or quantitative differences in the chemical composition can be found, especially for minor compounds [ 27 , 28 , 29 , 30 , 31 ]. This is due to the different genotype or species [ 32 , 33 ], environmental conditions and soil composition [ 34 , 35 ], geographical area of origin [ 36 ] and harvesting period, in addition to different extraction methods and plant parts [ 37 , 38 ].…”

Section: Discussionmentioning

confidence: 99%

Chemical Investigation and Dose-Response Phytotoxic Effect of Essential Oils from Two Gymnosperm Species (Juniperus communis var. saxatilis Pall. and Larix decidua Mill.)

Vitalini

Vaglia

Garzoli

2022

Plants

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The chemical composition of the liquid and vapor phases of leaf essential oils (EOs) obtained from two species of Gymnosperms (Juniperus communis var. saxatilis Willd. and Larix decidua Mill.) was investigated using the SPME-GC-MS technique. The results highlighted a composition characterized by 51 identified volatile compounds (34 in J. communis and 39 in L. decidua). In both bloils, monoterpenes prevailed over the sesquiterpenes, albeit with qualitative and quantitative differences. Sabinene (37.5% and 34.5%, respectively) represented the two most abundant components in the liquid and vapor phases of J. communis, and α-pinene (51.0% and 63.3%) was the main constituent in L. decidua. The phytotoxic activity of the two EOs was assessed in pre-emergence conditions using three concentrations in contact (2, 5, 10 µL/mL) and non-contact (2, 20, 50 µL) tests against Lolium multiflorum Lam. (Poaceae) and Sinapis alba L. (Brassicaceae). Treatments were effective in a dose-dependent manner by significantly reducing the germination (up to 100% and 45–60%, respectively, with filter paper and soil as a substrate) and the seedling development (1.3 to 8 times) of both target species. Moreover, an exploratory survey on the residual presence of volatile compounds in the soil at the end of the tests was carried out.

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