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J Agric Food Chem

Title:		"Characterization of Key Odorants in Cumberland Rosemary, Conradina verticillata"
Author(s):		Gorman C; Murray AF; Dein M; Munafo JP;
Address:		"Department of Food Science, University of Tennessee, Knoxville, Tennessee37996, United States"
Journal Title:		J Agric Food Chem
Year:		2022
Volume:		20220929
Issue:		40
Page Number:		12916 - 12924
DOI:		10.1021/acs.jafc.2c04872
ISSN/ISBN:		1520-5118 (Electronic) 0021-8561 (Linking)
Abstract:		"Conradina verticillata Jennison, commonly known as Cumberland Rosemary, is an endangered plant from the mint family Lamiaceae. This species is a flowering, perennial shrub found only in a few counties in Kentucky and Tennessee. Although the odorants responsible for Cumberland Rosemary's unique aroma have not been previously characterized, in this study, a total of 32 odorants were identified using gas chromatography-olfactometry (GC-O) and gas chromatography-mass spectrometry (GC-MS). Odorant flavor dilution (FD) factors were determined through the application of aroma extract dilution analysis (AEDA). Seven odorants with FD factors >/=64 were quantitated by stable isotope dilution assays (SIDA), and their odor activity values (OAV) were calculated. Odorants with OAV >/=1 included 1-octen-3-one (earthy-mushroom, OAV 2,900,000), 1,8-cineole (eucalyptus, OAV 510,000), borneol (earthy, OAV 10,000), bornyl acetate (earthy-fruity, OAV 3,700), eugenol (spicy, OAV 2,200), menthone (mint, OAV 130), and camphor (herbaceous, OAV 72). Sensory analysis revealed that an odor simulation model based on the quantitative data was a close match to the aroma of the plant. Omission studies determined that 1-octen-3-one, 1,8-cineole, and eugenol were the key odorants critical to Cumberland Rosemary's distinct aroma profile. The stereochemistry of selected odorants was also determined by chiral chromatography. This study established a foundation for future experiments on the aroma chemistry of C. verticillata and the other six members of the Conradina genus"
Keywords:		Camphor/analysis Eucalyptol/analysis Eugenol/analysis Gas Chromatography-Mass Spectrometry Ketones *Lamiaceae Odorants/analysis Olfactometry *Rosmarinus *Volatile Organic Compounds/chemistry Conradina verticillata Cumberland Rosemary Lamiaceae aroma extra;
Notes:		"MedlineGorman, Claire Murray, Anne F Dein, Melissa Munafo, John P Jr eng 2022/09/30 J Agric Food Chem. 2022 Oct 12; 70(40):12916-12924. doi: 10.1021/acs.jafc.2c04872. Epub 2022 Sep 29"