Abstract Fagopyrins, anthraquinone derivatives present in buckwheat, are structurally similar to hypericin. The objective of this study was to determine changes of fagopyrins in flowers, leaves, and stems of common buckwheat (Fagopyrum esculentum; CB) and Tartary buckwheat (F. tataricum; TB) during growth. Flowers, leaves, and stems of buckwheats were collected until the 50th day after sowing (DAS) at intervals of 5 days. Fagopyrins were analyzed by HPLC-FLD and HPLC-ESI-MS/MS. Buckwheat flowers contained significantly higher fagopyrins than the other parts. Fagopyrins in TB flowers were significantly higher than in CB flowers. Concentration of fagopyrins in the flowers gradually decreased until the 50th DAS. Fagopyrin F was the major form of fagopyrins in buckwheats, accounting for 68–79 % in CB and 81–94 % in TB with TB flowers the highest (93–94 %). This study was the first in analyzing contents of fagopyrin F and fagopyrins in different parts of buckwheats during growth.

中文翻译：

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普通荞麦 (Fagopyrum esculentum) 和苦荞 (F. tataricum) 生长过程中不同部位的荞麦甙

摘要 Fagopyrins 是一种存在于荞麦中的蒽醌衍生物，在结构上与金丝桃素相似。本研究的目的是确定普通荞麦 (Fagopyrum esculentum; CB) 和苦荞 (F. tataricum; TB) 在生长过程中花、叶和茎中荞麦蛋白的变化。以 5 天的间隔收集荞麦的花、叶和茎，直到播种后第 50 天 (DAS)。通过 HPLC-FLD 和 HPLC-ESI-MS/MS 分析蚕豆苷。荞麦花比其他部分含有显着更高的 fagopyrin。TB 花中的 Fagopyrins 显着高于 CB 花。直到第 50 次 DAS，花中的 fagopyrin 浓度逐渐降低。Fagopyrin F 是荞麦中 fagopyrin 的主要形式，占 CB 的 68-79% 和 TB 的 81-94%，TB 花最高（93-94%）。本研究首次分析了荞麦生长过程中不同部位的荞麦甙F和荞麦甙的含量。