CREA Research Centre for Animal Production and Aquaculture, Viale Piacenza 29, 26900 Lodi, Italy.
DDS Department of Drug Sciences, University of Pavia, Viale Taramelli 12, 27100 Pavia, Italy.
Molecules. 2019 Oct 28;24(21):3878. doi: 10.3390/molecules24213878.
The volatile fractions from fresh inflorescences of naturally growing orchids (L.) R. M. Bateman, Pridgeon & M. W. Chase (Pollini), (L.) R. (Burm.) Greuter and (Burm. f.) B. were isolated by steam distillation and analyzed by GC/FID and GC/MS. Saturated hydrocarbons were quantified as the major constituents of the volatile fraction (47.87-81.57% of the total essential oil), of which long-chain monounsaturated hydrocarbons accounted from 9.20% to 32.04% of the total essential oil. Double bond position in linear alkenes was highlighted by dimethyl disulfide derivatization and MS fragmentation. Aldehydes (from 3.45 to 18.18% of the total essential oil), alcohols (from 0.19% to 13.48%), terpenes (from 0.98 to 2.50%) and acids (0.30 to 2.57%) were also detected. These volatiles compounds may represent a particular feature of these plant species, playing a critical role in the interaction with pollinators. DPPH assay evaluating the antioxidant activity of the essential oils was carried out, showing a dose-dependent antioxidant activity.
从自然生长的兰花（L.）R. M. Bateman、Pridgeon & M. W. Chase （Pollini）、（L.）R. （Burm.）Greuter 和（Burm. f.）B. 的新鲜花序中通过水蒸气蒸馏分离挥发性成分，并通过 GC/FID 和 GC/MS 进行分析。饱和烃被定量为挥发性成分的主要成分（占总精油的 47.87-81.57%），其中长链单不饱和烃占总精油的 9.20%至 32.04%。通过二甲基二硫醚衍生化和 MS 碎裂突出了直链烯烃中的双键位置。还检测到醛（占总精油的 3.45%至 18.18%）、醇（占 0.19%至 13.48%）、萜烯（占 0.98%至 2.50%）和酸（占 0.30%至 2.57%）。这些挥发性化合物可能代表这些植物物种的一个特定特征，在与传粉者的相互作用中起着关键作用。通过 DPPH 测定法评估精油的抗氧化活性，结果表明抗氧化活性具有剂量依赖性。
