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KMID : 0903619980390040412
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Journal of the Korean Society for Horticultural Science
1998 Volume.39 No. 4 p.412 ~ p.416
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Seasonal Changes in Concentrations of Sugar , Organic Acid , and Anthocyanin in Grapes (Vitis spp.)
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Abstract
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Several vinifera and hybrid grape cultivars were evaluated for their total sugar, total acid, anthocyanin content, and other quality characters. Varietal differences were recognized in soluble solids content and the mode of accumulation. Cabernet Sauvignon, Delaware, and Campbell Early were among the cultivars classified as high soluble solids cultivars while Syrah and Pinot Noir were low in soluble solids content. Varietal differences were recognized in organic acids content and the mode of accumulation. SV 18-315 and Pinot Noir were among the cultivars classified as high acid varieties but differences in total organic acid among the cultivars were not noted. Marked decrease in organic acids during ripening resulted in 1/10 of the maximum content. Skin color evaluated with color and color difference meter indicated the decrease of Y, x, y, L^*, and b^* values while a^* value increased with ripening. Anthocyanin content increased markedly during ripening, and Campbell Early, Cabernet Sauvignon, and Syrah were among the cultivars with high anthocyanin content.
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