| Carotenoids in white- and red-fleshed loquat fruits. | |
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MedLine Citation:
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PMID: 17708644 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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Fruits of 23 loquat ( Eriobotrya japonica Lindl.) cultivars, of which 11 were white-fleshed and 12 red-fleshed, were analyzed for color, carotenoid content, and vitamin A values. Color differences between two loquat groups were observed in the peel as well as in the flesh. beta-Carotene and lutein were the major carotenoids in the peel, which accounted for about 60% of the total colored carotenoids in both red- and white-fleshed cultivars. beta-Cryptoxanthin and, in some red-fleshed cultivars, beta-carotene were the most abundant carotenoids in the flesh, and in total, they accounted for over half of the colored carotenoids. Neoxanthin, violaxanthin, luteoxanthin, 9- cis-violaxanthin, phytoene, phytofluene, and zeta-carotene were also identified, while zeaxanthin, alpha-carotene, and lycopene were undetectable. Xanthophylls were highly esterified. On average, 1.3- and 10.8-fold higher levels of colored carotenoids were observed in the peel and flesh tissue of red-fleshed cultivars, respectively. The percentage of beta-carotene among colored carotenoids was higher in both the peel and the flesh of red-fleshed cultivars. Correlations between the levels of total colored carotenoids and the color indices were analyzed. The a* and the ratio of a*/ b* were positively correlated with the total content of colored carotenoids, while L*, b*, and H degrees correlated negatively. Vitamin A values, as retinol equivalents (RE), of loquat flesh were 0.49 and 8.77 microg/g DW (8.46 and 136.41 microg/100 g FW) on average for white- and red-fleshed cultivars, respectively. The RE values for the red-fleshed fruits were higher than fruits such as mango, red watermelon, papaya, and orange as reported in the literature, suggesting that loquat is an excellent source of provitamin A. |
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Authors:
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Chun-Hua Zhou; Chang-Jie Xu; Chong-De Sun; Xian Li; Kun-Song Chen |
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Publication Detail:
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Type: Journal Article; Research Support, Non-U.S. Gov't Date: 2007-08-21 |
Journal Detail:
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Title: Journal of agricultural and food chemistry Volume: 55 ISSN: 0021-8561 ISO Abbreviation: J. Agric. Food Chem. Publication Date: 2007 Sep |
Date Detail:
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Created Date: 2007-09-13 Completed Date: 2007-12-12 Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 0374755 Medline TA: J Agric Food Chem Country: United States |
Other Details:
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Languages: eng Pagination: 7822-30 Citation Subset: IM |
Affiliation:
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Laboratory of Fruit Molecular Physiology and Biotechnology, Huajiachi Campus, Zhejiang University, Hangzhou 310029, People's Republic of China. |
Export Citation:
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| MeSH Terms | |
Descriptor/Qualifier:
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Carotenoids
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analysis* Chromatography, High Pressure Liquid Eriobotrya / chemistry* Fruit / chemistry* Pigmentation Vitamin A / analysis |
| Chemical | |
Reg. No./Substance:
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11103-57-4/Vitamin A; 36-88-4/Carotenoids |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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