Fagopyritols, D-chiro-Inositol, and Other Soluble Carbohydrates in Buckwheat Seed Milling Fractions

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• 作者：Kathryn J. Steadman ; Monica S. Burgoon ; Rebecca L. Schuster ; Betty A. Lewis ; Steven E. Edwardson ; and Ralph L. Obendorf
• 刊名：Journal of Agricultural and Food Chemistry
• 出版年：2000
• 出版时间：July 2000
• 年：2000
• 卷：48
• 期：7
• 页码：2843 - 2847
• 全文大小：47K
• 年卷期：v.48,no.7(July 2000)
• ISSN：1520-5118

文摘

Fagopyritols are mono-, di-, and trigalactosyl derivatives of D-chiro-inositol that accumulate in seedsof common buckwheat (Fagopyrum esculentum Moench) and may be important for seed maturationand as a dietary supplement. Fagopyritols and other soluble carbohydrates were assayed in maturegroats and 11 milling fractions of common buckwheat seed. Because fagopyritols are in embryo andaleurone tissues, differences in fagopyritol concentrations reflect varying proportions of these tissuesin each milling fraction. Bran milling fractions contained 6.4 g of total soluble carbohydrates per100 g of dry weight, 55% of which was sucrose and 40% fagopyritols. Flour milling fractions hadreduced fagopyritol concentration [0.7 g/100 g of dry weight total fagopyritols in the dark (Supreme)flour and 0.3 g/100 g in the light (Fancy) flours]. Fagopyritol B1 was 70% of total fagopyritols in allmilling fractions. Fagopyritols were 40% of total soluble carbohydrates in groats of two cultivars ofcommon buckwheat but 21% in groats of tartary buckwheat [Fagopyrum tataricum (L.) Gaertn.],probably a reflection of environment and genetics. A rhamnoglucoside present in tartary buckwheatwas not detected in common buckwheat.Keywords: Fagopyrum esculentum; Fagopyrum tataricum; buckwheat seed milling fractioncomposition; fagopyritol; D-chiro-inositol