Identification and Characterization of Basil Anthocyanins

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  • 1 Center for New Crops and Plant Products, Purdue Univ., West Lafayette, IN 47907-1165

The importance of anthocyanins as a food coloring, UV protectant, inhibitor of pathogens, and medicinal compound has been well-documented, with more than 300 anthocyanin compounds being reported in plants. The Lamiaceae family, including sage, thyme, and basil, has long been recognized as a rich source of diverse and unique anthocyanins. Because purple basil varieties have become more popular in the ornamental and herb trade, we conducted a study to identify and characterize the anthocyanins present in eight varieties of purple basils (Ocimum basilicum) utilizing high-pressure liquid chromatography, spectral data and plasma-desorption mass spectronomy. Nine different anthocyanins were identified. Seven of the pigments were cyanidin-based, with cyanidin-3-(6”-p-coumarylglucoside)-5-(6”'-malonylglucoside) as the major pigment. Two minor pigments based on peonidin were also identified. Total anthocyanin content was also determined and comparisons made to other anthocyanin sources.

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