Evaluation of Polyphenolic components of Fallopia (Polygonaceae) species in Iran

Fallopia (Polygonaceae) with about ۱۷ annual and perennial species, is of ornamental and weed importance. This genus is distributed in different parts of the world, including Eurasia. Its species are widely distributed as a weed in cultivations or disturbed areas in temperate regions of the world (Keshavarzi & Mosaferi, ۲۰۱۹). Fallopia has three species in Iran: F. convolvulus, F. dumetorum and F. baldschuanica (Mozaffarian ۲۰۱۲). F. convolvulus and F. dumetorum are famous weeds of different crops (FAO ۲۰۱۵), that act as a contaminating agent for seed resources (Holm et al. ۱۹۹۱). Seeds of these species are edible for their amino acid content. Fallopia species were considered as a food source in ancient times (Hanf ۱۹۹۰). F. convolvulus act as a bio-accumulator agent in polluted soils (Pedersen et al. ۲۰۰۰). Some of the Fallopia species has anticancer potential and acts as a natural modulator, that can overcome multidrug resistance of cancer cells. So, the extracts of these species are a good source of bioactive components (Olaru et al., ۲۰۱۵). In present study, polyphenolic compounds in three species of Fallopia in Iran are compared. Samples were gathered from natural habitats and extracted. Studying the crude extract by HPLC showed that in these three species there are cinnamic acid, ۴-hydroxy-cinnamic acid, ۴-chlorobenzoic acid and ۴-hydroxybenzoic acid, rosmarinic acid and coumaric acid in different amounts. These polyphenolic compounds have a wide range of biological activities, and show antioxidant activity. Qualitative and quantitative differences of polyphenolics in three Fallopia species are discussed. These valuable components provide a chance to turn threats into opportunities for these weeds.

کلیدواژه ها:

Fallopia ، Phenolic compounds ، Iran