Flavonoid Composition of Fruit Tissues of Citrus Species
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An HPLC analysis was performed on the concentrations of flavonoids in 42 species and cultivars of the <I>Citrus</I> genus and those of two <I>Fortunella</I> and one <I>Poncirus</I> species according to the classification system established by Tanaka. The composition of 8 flavanones and 9 flavone/ols for these species was determined in the albedo, flavedo, segment epidermis and juice vesicle tissues, and those in the fruit and peel tissues were calculated from the composition data of the tissues. A principal component analysis showed that such neohesperidosyl flavonoids as neoeriocitrin, naringin, neohesperidin, and rhoifolin had large factor loading values in the first principal component for each tissue. The flavonoid composition of citrus fruits was approximately the same within each section of Tanaka's system, except for the species in the <I>Aurantium</I> section and those with a peculiar flavonoid composition such as Bergamot (<I>C. bergamia</I>), Marsh grapefruit (<I>C. paradisi</I>), Sour orange (<I>C. aurantium</I>), and Shunkokan (<I>C. shunkokan</I>). The <I>Aurantium</I> section included both naringin-rich and hesperidin-rich species.
- Agricultural and Biological Chemistry
Agricultural and Biological Chemistry 70(1), 178-192, 2006-01-23
Japan Society for Bioscience, Biotechnology, and Agrochemistry