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首页> 外文期刊>American Journal of Plant Sciences >Seasonal Flavonoid Profile and Kaempferitrin Content in the Leaf Extracts of &i&Bauhinia forficata&/i& Subspecies &i&forficata&/i& from Two Locations in Southeastern Brazil
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Seasonal Flavonoid Profile and Kaempferitrin Content in the Leaf Extracts of &i&Bauhinia forficata&/i& Subspecies &i&forficata&/i& from Two Locations in Southeastern Brazil

机译：紫荆花叶提取物中的季节性黄酮类成分和山楂铁蛋白含量亚种i forficata。来自巴西东南部的两个地点

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摘要

The leaves of Bauhinia forficata L. (Fabaceae) are used in Brazilian folk medicine mainly as antidiabetic agent. They are rich in polyphenols, and kaempferitrin and other flavonoids are currently considered as basic chemical criteria for the quality and the effectiveness of extracts and phytopharmaceuticals derived from them. Aiming to expand the scope of current data of the chemical profile of B. forficata subsp. forficata , the present study employed HPLC-DAD and HPLC-DAD-ESI/MS to compare the flavonoid profile and kaempferitrin content in the leaves of specimens collected seasonally during one year, in two different locations in Southeastern Brazil: Rio de Janeiro (RJ) and S ã o Paulo (SP) states. The data showed a variation in the flavonoid profile and in the kaempferitrin content depending on the place of collection and the season of the year. The target compound, kaempferitrin, was found to be only a minor constituent in RJ (0.21 - 1.02 μg/mg), and was mostly absent or occurred as trace in SP location (0.00 - 0.12 μg/mg). Some degree of similarity was observed in the flavonoid profiles according to the region of collection. In agreement with some published reports, the low and quite variable kaempferitrin content as well the wide variability of the flavonoid profiles brings into question the dubious matter of using these compounds as chemical markers for this medicinal species.
机译：巴西紫荆花（Fabaceae）的叶子主要用于抗糖尿病药，用于巴西民间医学。它们含有丰富的多酚，并且从它们中提取的提取物和植物药的质量和有效性，kaempferitrin和其他类黄酮目前被认为是基本的化学标准。旨在扩大 B. forficata亚种的化学概况的当前数据范围。 forficata，本研究采用HPLC-DAD和HPLC-DAD-ESI / MS来比较一年中在两个不同地点在一年中季节性收集的标本叶片中的类黄酮含量和kaempferitrin含量。巴西东南部：里约热内卢（RJ）和S＆atilde; o保罗（SP）州。数据显示，黄酮类成分和山楂铁素含量随收集地点和一年中的季节而变化。发现目标化合物kaempferitrin仅是RJ中的次要成分（0.21-1.02μg/ mg），在SP位置几乎没有或以痕量出现（0.00-0.12μg/ mg）。根据收集区域，在类黄酮概况中观察到一定程度的相似性。与一些已发表的报告相一致，山竹铁素含量低且变化不定，黄酮类化合物的分布范围广，这使人们怀疑将这些化合物用作该药用物种的化学标记物是有疑问的。

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