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Front Plant Sci

Title:		Chilling temperatures and controlled atmospheres alter key volatile compounds implicated in basil aroma and flavor
Author(s):		Rodeo AJD; Mitcham EJ;
Address:		"Department of Plant Sciences, University of California, Davis, Davis, CA, United States. Institute of Crop Science, College of Agriculture and Food Science, University of the Philippines Los Banos, College, Laguna, Philippines"
Journal Title:		Front Plant Sci
Year:		2023
Volume:		20230703
Issue:
Page Number:		1218734 -
DOI:		10.3389/fpls.2023.1218734
ISSN/ISBN:		1664-462X (Print) 1664-462X (Electronic) 1664-462X (Linking)
Abstract:		"Use of basil in its fresh form is increasingly popular due to its unique aromatic and sensory properties. However, fresh basil has a short shelf life and high chilling sensitivity resulting in leaf browning and loss of characteristic aroma. Moderate CO(2) atmospheres have shown potential in alleviating symptoms of chilling injury in basil during short-term storage but its effect on the flavor volatiles is unclear. Moreover, studies on basil volatile profile as impacted by chilling temperatures are limited. We investigated the response of two basil genotypes to low temperatures and atmosphere modification, with emphasis on the volatile organic compounds responsible for basil aroma and flavor. Leaves were stored for 6 days at 5, 10, or 15 degrees C combined with three different CO(2) atmospheres (0.04%, 5% or 10%). Basil volatile profile was assessed using headspace solid phase microextraction (HS-SPME) coupled with gas chromatography-mass spectrometry (GC-MS). Leaves suffered severe chilling injury and greater loss of aroma volatiles at 5 degrees C compared to 10 degrees C and 15 degrees C. More than 70 volatiles were identified for each genotype, while supervised multivariate analysis revealed 26 and 10 differentially-accumulated volatiles for 'Genovese' and 'Lemon' basil, respectively, stored at different temperatures. Storage in 5% CO(2) ameliorated the symptoms of chilling injury for up to 3 days in 'Genovese', but not in 'Lemon' basil. Both chilling temperatures and controlled atmospheres altered key volatile compounds implicated in basil aroma and flavor, but temperature had a bigger influence on the observed changes in volatile profile"
Keywords:		aroma basil chilling injury controlled atmosphere flavor low temperature storage volatile profile;
Notes:		"PubMed-not-MEDLINERodeo, Arlan James D Mitcham, Elizabeth J eng Switzerland 2023/07/19 Front Plant Sci. 2023 Jul 3; 14:1218734. doi: 10.3389/fpls.2023.1218734. eCollection 2023"