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Article . 2021
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image/svg+xml Jakob Voss, based on art designer at PLoS, modified by Wikipedia users Nina and Beao Closed Access logo, derived from PLoS Open Access logo. This version with transparent background. http://commons.wikimedia.org/wiki/File:Closed_Access_logo_transparent.svg Jakob Voss, based on art designer at PLoS, modified by Wikipedia users Nina and Beao
Phytochemistry
Article . 2021 . Peer-reviewed
License: Elsevier TDM
Data sources: Crossref
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Headspace GC-MS analysis of differences in intra- and interspecific Terpene profiles of Picea pungens Engelm. and P. abies (L.) Karst

Authors: Raber, Alexandra G.; Peachey-Stoner, Reuben J.; Cessna, Stephen G.; Siderhurst, Matthew S.;

Headspace GC-MS analysis of differences in intra- and interspecific Terpene profiles of Picea pungens Engelm. and P. abies (L.) Karst

Abstract

Conifer terpenes mediate a number of ecological roles such as deterring herbivory and allelopathic (plant-plant) communication. These terpenes also effect air quality and climate models and are used in chemotaxonomic studies. Herein we report on variation in both intra- and interspecific spruce terpenes using static headspace gas chromatography mass spectrometry (HS-GC-MS) and principal component analysis (PCA) of 'fingerprint' volatile profiles. Samples of blue spruce (Picea pungens), Norway spruce (P. abies), and cedar of Lebanon (Cedrus libani), an outgroup control, were analyzed by HS-GC-MS using both chiral and achiral GC columns. Headspace sampling parameters, temperature and heating time, were optimized to maximize detected terpenes. PCA of terpene 'fingerprint' profiles showed differences by species, by individual trees, but perhaps surprisingly not by environmental conditions. Analysis of blue and Norway spruce over several months show that volatile emissions remained remarkably constant unlike cedar of Lebanon, which showed a much greater variation in volatile profiles. Branches and buds from both spruces were found to release greater amounts of terpenes than samples of needles. The enantiomeric compositions of seven chiral monoterpenes were found to be largely similar between the three conifers with the exception of (-)-α-pinene, which was the dominant enantiomer released by Norway spruce and cedar of Lebanon, while (+)-α-pinene slightly predominated in blue spruce. While not the primary focus of this work, we believe this constitutes the first report on the enantiomeric composition of terpenes in cedar of Lebanon.

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Keywords

Norway, Terpenes, Biodiversity, Picea, Abies, Gas Chromatography-Mass Spectrometry, Taxonomy

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selected citations
These citations are derived from selected sources.
This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Citations provided by BIP!
popularity
This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
BIP!Popularity provided by BIP!
influence
This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Influence provided by BIP!
impulse
This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.
BIP!Impulse provided by BIP!
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