Terpenes in the essential oil of sagebrush (Artemisia tridentata)

Buttkus, H.; Bose, R. J.; Shearer, D. A.

doi:10.1021/jf60210a021

Cited by 19 publications

(12 citation statements)

References 7 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Although the relative fraction of eucalyptol in smoke is considerably higher than the EO, no evidence was found of eucalyptol-formation artifacts during analysis of standard compounds that are abundant in sagebrush smoke (e.g., camphor). The higher than expected eucalyptol fraction could be due to an unknown chemical conversion process during the fire or real differences in the 71 Additional oxygenated monoterpenoids were commonly detected, including camphor (27 fires), borneol (22 fires), and α-terpineol (18 fires) (Table S3), and others were uniquely observed in some fuel types. Estragole is relatively abundant only in ponderosa pine smoke and is a significant fraction of the needle EO (Figure 2b).…”

Section: Environmental Science and Technologymentioning

confidence: 99%

Highly Speciated Measurements of Terpenoids Emitted from Laboratory and Mixed-Conifer Forest Prescribed Fires

Hatch

Jen

Kreisberg

et al. 2019

Environ. Sci. Technol.

View full text Add to dashboard Cite

Wildland fires in the western United States are projected to increase in frequency, duration, and size. Characterized by widespread and diverse conifer forests, burning within this region may lead to significant terpenoid emissions. Terpenoids constitute a major class of highly reactive secondary organic aerosol (SOA) precursors, with significant structure-dependent variability in reactivity and SOA-formation potential. In this study, highly speciated measurements of terpenoids emitted from laboratory and prescribed fires were achieved using two-dimensional gas chromatography. Nearly 100 terpenoids were measured in smoke samples from 71 fires, with high variability in the dominant compounds. Terpenoid emissions were dependent on plant species and tissues. Canopy/needle-derived emissions dominated in the laboratory fires, whereas woody-tissue-derived emissions dominated in the prescribed fires. Such differences likely have implications for terpenoid emissions from high vs low intensity fires and suggest that canopy-dominant laboratory fires may not accurately represent terpenoid emissions from prescribed fires or wildland fires that burn with low intensity. Predicted SOA formation was sensitive to the diversity of emitted terpenoids when compared to assuming a single terpene surrogate. Given the demonstrated linkages between fuel type, fire terpenoid emissions, and the subsequent implications for plume chemistry, speciated measurements of terpenoids in smoke derived from diverse ecosystems and fire regimes may improve air quality predictions downwind of wildland fires.

show abstract

Section: Environmental Science and Technologymentioning

confidence: 99%

Highly Speciated Measurements of Terpenoids Emitted from Laboratory and Mixed-Conifer Forest Prescribed Fires

Hatch

Jen

Kreisberg

et al. 2019

Environ. Sci. Technol.

View full text Add to dashboard Cite

show abstract

“…32 The most abundant terpene in sagebrush oils is camphor (4, Figure 14.1), a monoterpene estimated to compose 40-45% of the total oil. 33 Went's coarse estimate of global monoterpene emissions was not too different from more sophisticated recent estimates made with 3D emissions models, with most models predicting global monoterpene fluxes between 100-120 Tg year À1 . 22 Like isoprene, monoterpenes are oxidized mostly through reaction with .…”

Section: The Types Of Emitted Bvocs and General Roles In Atmospheric mentioning

confidence: 84%

Reactions of Biogenic Volatile Organic Compounds in the Atmosphere

Monson

2010

The Chemistry and Biology of Volatiles

View full text Add to dashboard Cite

“…Fluorescence microscopy was used for determination of the location of lipids, essential oil, flavonoids, steroids, and polyphenols after application of various fluorochromes; Neutral Red for essential oil (Kirk 1970;Conn 1977); aluminium chloride and magnesium acetate (Charrière-Ladreix 1976) for flavonoids; antimony trichloride (Jensen 1962;Buttkus et al 1977) for terpenes contain steroids; and UV light (autofluorescence) for essential oil. Fluorescence was observed using a Cy5 filter set (excitation light of 590-650 nm and a barrier filter wavelength 663-738 nm), a FITC filter set (excitation light of 465-495 nm and a barrier filter wavelength 515-555 nm), and a TRITC filter set (excitation light of 525-565 nm and barrier filter wavelength 555-600 nm).…”

Section: Histochemistry and Fluorescencementioning

confidence: 99%

Taxonomic traits in the microstructure of flowers of parasitic Orobanche picridis with particular emphasis on secretory structures

Konarska

Chmielewski

2019

Protoplasma

View full text Add to dashboard Cite

Orobanche picridis is an obligate root parasite devoid of chlorophyll in aboveground organs, which infects various Picris species. Given the high level of phenotypic variability of the species, the considerable limitation of the number of taxonomically relevant traits (mainly in terms of generative elements), and the low morphological variation between species, Orobanche is regarded as one of the taxonomically most problematic genera. This study aimed to analyse the taxonomic traits of O. picridis flowers with the use of stereoscopic and bright-field microscopy as well as fluorescence, scanning, and transmission electron microscopy. The micromorphology of sepals, petals, stamens, and pistils was described. For the first time, the anatomy of parasitic Orobanche nectaries and the ultrastructure of nectaries and glandular trichomes were presented. Special attention was paid to the distribution and types of glandular and non-glandular trichomes as well as the types of metabolites contained in these structures. It was demonstrated that the nectary gland was located at the base of the gynoecium and nectar was secreted through modified nectarostomata. The secretory parenchyma cells contained nuclei, large amyloplasts with starch granules, mitochondria, and high content of endoplasmic reticulum profiles. Nectar was transported via symplastic and apoplastic routes. The results of histochemical assays and fluorescence tests revealed the presence of four groups of metabolites, i.e. polyphenols (tannins, flavonoids), lipids (acidic and neutral lipids, essential oil, sesquiterpenes, steroids), polysaccharides (acidic and neutral polysaccharides), and alkaloids, in the trichomes located on perianth elements and stamens.

show abstract

Terpenes in the essential oil of sagebrush (Artemisia tridentata)

Cited by 19 publications

References 7 publications

Highly Speciated Measurements of Terpenoids Emitted from Laboratory and Mixed-Conifer Forest Prescribed Fires

Highly Speciated Measurements of Terpenoids Emitted from Laboratory and Mixed-Conifer Forest Prescribed Fires

Reactions of Biogenic Volatile Organic Compounds in the Atmosphere

Taxonomic traits in the microstructure of flowers of parasitic Orobanche picridis with particular emphasis on secretory structures

Contact Info

Product

Resources

About