Characterisation and variation of antioxidant micronutrients in lettuce (Lactuca sativa folium)
| Autor: | Jean-Louis Lamaison, Hervé Michel, Andrée Carnat, Catherine Nicolle, Pierre Amouroux, Christian Rémésy, Didier Fraisse, Edmond Rock |
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| Rok vydání: | 2004 |
| Předmět: |
chemistry.chemical_classification
Lutein Nutrition and Dietetics biology Vitamin E medicine.medical_treatment food and beverages Lactuca biology.organism_classification chemistry.chemical_compound Horticulture Chlorogenic acid chemistry Dry weight Xanthophyll Botany medicine Cultivar Agronomy and Crop Science Carotenoid Food Science Biotechnology |
| Zdroj: | Journal of the Science of Food and Agriculture. 84:2061-2069 |
| ISSN: | 1097-0010 0022-5142 |
| DOI: | 10.1002/jsfa.1916 |
| Popis: | The main phenolic compound in six studied lettuce cultivars (five green and one red) was identified as dicaffeoyl tartaric acid. Quantitative but not qualitative differences were found in the phenolic profiles among green cultivars. The red oak leaf cultivar contained twofold more dicaffeoyl tartaric acid and 10-fold more chlorogenic acid than the green cultivars. Total phenolics ranged from 8.4 to 12.9 mg g−1 dry weight in green varieties and reached 27.8 mg g−1 dry weight in red oak leaf. Carotenoids and vitamins E and C were also quantified. Lutein was the main carotenoid found in all cultivars, together with another xanthophyll. The period of harvesting had only a marginal influence on total phenolic levels, whereas carotenoid and vitamin E levels were higher at the second period of harvesting. Vitamin C levels ranged between 6.1 and 9.9 mg per 100 g fresh weight. We investigated the total antioxidant power in lettuce. Total phenolics accounted for more than 60% of the total antioxidant capacity. Dicaffeoyl tartaric acid accounted for 55%. Copyright © 2004 Society of Chemical Industry |
| Databáze: | OpenAIRE |
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