Chemical Composition of the Unexplored Volatile Fraction of Betula glandulosa, a Prevalent Shrub in Nunavik, Québec.

Publisher: Verlag Helvetica Chimica Acta Country of Publication: Switzerland NLM ID: 101197449 Publication Model: Print-Electronic Cited Medium: Internet ISSN: 1612-1880 (Electronic) Linking ISSN: 16121872 NLM ISO Abbreviation: Chem Biodivers Subsets: MEDLINE

Original Publication: Zürich, Switzerland : Hoboken, NJ : Verlag Helvetica Chimica Acta ; Distributed in the USA by Wiley, c2004-

Betula* ; Ecosystem*; Herbivory ; Plant Leaves/chemistry ; Quebec

The volatile fraction of the leaves of Betula glandulosa Michx. has been investigated for its secondary metabolite composition by GC/MS and GC/FID. The rapid expansion of this shrub species in subarctic landscapes, like the ones found in Nunavik (Northern Québec, Canada), highly impacts ecosystem dynamics. Yet, despite its abundance, few phytochemical investigations have yet been conducted on this species. In this study, we present the first phytochemical investigation of the volatile metabolites of B. glandulosa leaves. Although no essential oil was isolated, volatile compounds were extracted from the hydrosol by steam distillation. The main metabolites observed were linalool (14.6-19.0 %), C 6 oxylipins (known as green leaf volatiles, GLV; total of 18.2-40.2 %), eugenol (1.6-8.6 %) and α-terpineol (3.3-4.8 %). Dwarf birch is an important food source for insects and herbivores, so knowledge of its metabolite composition could help understand parts of its functional role in subarctic ecosystems. The composition of the volatile fraction could serve as marker for differentiating B. glandulosa from other dwarf birch species like Betula nana L.
(© 2021 Wiley-VHCA AG, Zurich, Switzerland.)

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Natural Science and Engineering Research Council of Canada (NSERC); Fonds de Recherche du Québec-Nature et Technologies (FRQNT), Sentinel North, and IDEX UCAjedi; Center for Northern Studies

Keywords: Betula glandulosa; green leaf volatiles; northern ecosystems; terpenes; volatile secondary metabolites

Date Created: 20211209 Date Completed: 20220218 Latest Revision: 20220218

20231215

10.1002/cbdv.202100871

34882976