| Title: | Chemical Composition of Essential Oil from Flowers of Five Fragrant Dendrobium (Orchidaceae) |
| Author(s): | Robustelli Della Cuna FS; Calevo J; Bazzicalupo M; Sottani C; Grignani E; Preda S; |
| Address: | "DDS-Department of Drug Sciences, University of Pavia, 27100 Pavia, Italy. Casimiro Mondino National Neurological Institute, 27100 Pavia, Italy. DBIOS-Department of Life Sciences and Systems Biology, University of Torino, 10125 Torino, Italy. DISTAV-Department of Earth, Environment and Life Sciences, University of Genova, 16132 Genova, Italy. Environmental Research Center, ICS MAUGERI SPA SB, Institute of Pavia, IRCCS, 27100 Pavia, Italy" |
| ISSN/ISBN: | 2223-7747 (Print) 2223-7747 (Electronic) 2223-7747 (Linking) |
| Abstract: | "A detailed chemical composition of Dendrobium essential oil has been only reported for a few main species. This article is the first to evaluate the essential oil composition, obtained by steam distillation, of five Indian Dendrobium species: Dendrobium chrysotoxum Lindl., Dendrobium harveyanum Rchb.f., and Dendrobium wardianum R.Warner (section Dendrobium), Dendrobium amabile (Lour.) O'Brien, and Dendrobium chrysanthum Wall. ex Lindl. (section Densiflora). We investigate fresh flower essential oil obtained by steam distillation, by GC/FID and GC/MS. Several compounds are identified, with a peculiar distribution in the species: Saturated hydrocarbons (range 2.19-80.20%), organic acids (range 0.45-46.80%), esters (range 1.03-49.33%), and alcohols (range 0.12-22.81%). Organic acids are detected in higher concentrations in D. chrysantum, D. wardianum, and D. harveyanum (46.80%, 26.89%, and 7.84%, respectively). This class is represented by palmitic acid (13.52%, 5.76, and 7.52%) linoleic acid (D. wardianum 17.54%), and (Z)-11-hexadecenoic acid (D. chrysantum 29.22%). Esters are detected especially in species from section Dendrobium, with ethyl linolenate, methyl linoleate, ethyl oleate, and ethyl palmitate as the most abundant compounds. Alcohols are present in higher concentrations in D. chrysantum (2.4-di-tert-butylphenol, 22.81%), D. chrysotoxum (1-octanol, and 2-phenylethanol, 2.80% and 2.36%), and D. wardianum (2-phenylethanol, 4.65%). Coumarin (95.59%) is the dominant compound in D. amabile (section Densiflora) and detected in lower concentrations (range 0.19-0.54%) in other samples. These volatile compounds may represent a particular feature of these plant species, playing a critical role in interacting with pollinators" |
| Keywords: | Dendrobium essential oil mass spectrometry pollinator steam distillation; |
| Notes: | "PubMed-not-MEDLINERobustelli Della Cuna, Francesco Saverio Calevo, Jacopo Bazzicalupo, Miriam Sottani, Cristina Grignani, Elena Preda, Stefania eng Switzerland 2021/08/29 Plants (Basel). 2021 Aug 20; 10(8):1718. doi: 10.3390/plants10081718" |
