Aquatic and Crop Resource Development, National Research Council Canada, 550 University Avenue, Charlottetown, PE C1A 4P3, Canada.
J Agric Food Chem. 2013 Jul 3;61(26):6383-92. doi: 10.1021/jf4019239. Epub 2013 Jun 19.
Japanese knotweed (Fallopia japonica , also known as Polygonum cuspidatum) is a common invasive plant species on Prince Edward Island (PEI), Canada, whereas it has been used in Chinese medicine and more recently as a raw material for extracting resveratrol. This paper reports on the quantification of resveratrol, polydatin, emodin, and physcion in roots, stems, and leaves of Japanese knotweed samples from PEI and British Columbia (BC), Canada, and nine provinces of China, by ultraperformance liquid chromatography (UPLC). The results showed that the root contains a much higher level of resveratrol than the stem and leaf, and it is accumulated in its highest level in October. PEI-grown knotweed contains similar levels of resveratrol and polydatin compared to Chinese samples collected in the month of October, but the contents of the other anthraquinones (emodin and physcion) are different. As such, Japanese knotweed grown in PEI could be a commercially viable source of raw material for resveratrol production; however, caution has to be taken in harvesting the right plant species.
日本虎杖（Polygonum cuspidatum，也称为 Fallopia japonica）是加拿大爱德华王子岛（PEI）常见的入侵植物物种，而在中国传统医学中，它被用作药材，最近又被用作提取白藜芦醇的原料。本文通过超高效液相色谱（UPLC）报告了来自加拿大 PEI 和不列颠哥伦比亚省（BC）以及中国九个省份的日本虎杖样品的根、茎和叶中白藜芦醇、虎杖苷、大黄素和大黄素甲醚的定量分析。结果表明，根中白藜芦醇的含量远高于茎和叶，并且在 10 月积累到最高水平。与 10 月在中国采集的样品相比，PEI 种植的虎杖中的白藜芦醇和虎杖苷含量相似，但其他蒽醌（大黄素和大黄素甲醚）的含量不同。因此，PEI 种植的日本虎杖可能是生产白藜芦醇的一种具有商业可行性的原料来源；但是，在收获正确的植物物种时必须小心谨慎。
