Carotenoid levels in maturing grapes as affected by climatic regions, sunlight and shade

Date
1991
Journal Title
Journal ISSN
Volume Title
Publisher
South African Society for Enology and Viticulture
Abstract
The effect of climatic region, degree of ripeness, sunlight and shade on carotenoid concentrations in Weisser Riesling and Chenin blanc grapes was investigated. Lutein and beta-carotene concentrations were higher in grapes from hot regions than grapes from cooler regions. In general, decreases in carotenoid concentrations were observed with an increase in ripeness. Also, grapes exposed to sunlight generally had lower carotenoid concentrations than shaded grapes. Both lutein and beta-carotene concentrations varied little between Weisser Riesling and Chenin blanc grapes at comparable ripening stages.
Description
CITATION: Marais, J., Van Wyk, C. J. & Rapp, A. 1991. Carotenoid levels in maturing grapes as affected by climatic regions, sunlight and shade. South African Journal of Enology & Viticulture, 12(2):64-69, doi:10.21548/12-2-2209.
The original publication is available at http://www.journals.ac.za/index.php/sajev
Keywords
Carotenoids in grapes, Weisser Riesling grapes -- Climatic factors, Chenin blanc grapes -- Climatic factors
Citation
Marais, J., Van Wyk, C. J. & Rapp, A. 1991. Carotenoid levels in maturing grapes as affected by climatic regions, sunlight and shade. South African Journal of Enology & Viticulture, 12(2):64-69, doi:10.21548/12-2-2209