Topic
Polygonum
About: Polygonum is a research topic. Over the lifetime, 1230 publications have been published within this topic receiving 12765 citations.
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01 Jan 2013
TL;DR: In this article, the qualitative composition and assay content of polyphenol compound of Polygonum (Reynoutria) sachalinense introduced was identifi ed by means of chemical methods and standard operating procedures.
Abstract: For the fi rst time by means of chemical methods and standard operating procedures in the natural conditions of Caucasian Mineralnye Vody the qualitative composition and assay content of polyphenol compound of Polygonum (Reynoutria) sachalinense introduced was identifi ed. Polygonum (reynoutria) sachalinense contains a signifi cant quantity of polyphenol compound that can determine antioxidant activity of the given plant. The most informative methods and manufacturing methods of polyphenol compound identifi cation of Polygonum (reynoutria) sachalinense were established. Such compounds as rutin, dihydroquercetin, chicory acid, ferulic acid , caffeic acid and neoсhlorogenic аcid were identifi ed which gives indication to suppose that this plant can be used (after certain pharmacological and clinical testing) for prevention and treatment such diseases as atherosclerosis, Alzheimer disease, type 2 diabetes mellitus and others.
Patent•
05 Aug 2015
TL;DR: A pharmaceutical composition comprising Polygonum capitatum and coptis roots, a preparation method therefor, and uses thereof in the preparation in drugs for resisting against bacteria, particularly Helicobacter pylori.
Abstract: A pharmaceutical composition comprising Polygonum capitatum and coptis roots, a preparation method therefor, and uses thereof in the preparation in drugs for resisting against bacteria, particularly Helicobacter pylori.
TL;DR: In this paper , the effect of soil pH (pHs of 5, 6, and 7) on the accumulation and translocation of Cd by Polygonum hydropiper (L.) in low and moderately Cd-contaminated paddy soil (0.56 and 0.92 mg/kg, respectively).
Abstract: Wetland macrophytes have advantages when used in the remediation of cadmium (Cd)-contaminated paddy fields because they can adapt to overly wet soil environments; however, only a few studies have tested the efficiency of macrophytes in Cd phytoremediation. In this study, we investigated the effect of soil pH (pHs of 5, 6, and 7) on the accumulation and translocation of Cd by Polygonum hydropiper (L.) in low and moderately Cd-contaminated paddy soil (0.56 and 0.92 mg/kg, respectively). Our results indicated that Cd accumulation in stems and roots, as well as subcellular distribution in P. hydropiper, was affected by soil pH, with significant interactions between the soil pH and Cd level. At low soil Cd levels, stem and root Cd contents were higher at a soil pH value of 6. In addition, with higher soil pH values, the proportion of Cd distributed in the cell wall increased, whereas that distributed in the organelles decreased. The Cd content in the roots and stems of P. hydropiper significantly decreased with the increase in soil pH in the moderate Cd-contaminated soil. In addition, with higher soil pH values, the proportion of Cd distributed in the cell wall decreased, whereas that distributed in the organelles increased. The translocation factor (TF) of P. hydropiper was higher than one in all treatments, indicating that it can effectively transport root-absorbed Cd to the aboveground shoots. Based on the relatively high bioconcentration factor and TF, P. hydropiper has the potential to remediate Cd-polluted paddy soil. Furthermore, the remediation efficiency of P. hydropiper can be enhanced by adjusting the pH as per the soil-Cd pollution.
TL;DR: In this paper , two active substances were separated using a series of purification procedures and determined through spectral analysis as (−)-3-hydrox-β-ionone and (−)- 3-hydroxy-7,8-dihydro-βionone, respectively.
Abstract: Polygonum chinense Linn. is a medicinal and invasive plant that belongs to the family Polygonaceae. The pharmacological activities and phytochemical constituents of Polygonum chinense are well reported, but the allelopathic effects and potent allelopathic substances of P. chinense remain to be investigated. Hence, this experiment was conducted to separate and characterize potentially allelopathic substances from an extract of the Polygonum chinense plant. The Polygonum chinense plant extracts highly suppressed the growth of cress (Lepidium sativum L.), lettuce (Lactuca sativa L.), barnyard grass (Echinochloa crusgalli (L.) P. Beauv.), and timothy grass (Phleum pratense L.) seedlings in a species- and concentration-dependent way. Two active substances were separated using a series of purification procedures and determined through spectral analysis as (−)-3-hydroxy-β-ionone and (−)-3-hydroxy-7,8-dihydro-β-ionone. These two compounds significantly suppressed the seedling growth of Lepidium sativum (cress) at concentrations of 0.01 and 1 mM, respectively. The extract concentrations necessary for 50% growth inhibition (I50 values) of the cress hypocotyls and roots were 0.05 and 0.07 mM for (−)-3-hydroxy-β-ionone, respectively, and 0.42 and 1.29 mM for (−)-3-hydroxy-7,8-β-ionone, respectively. These findings suggest that these two compounds are in charge of the inhibitory effects of the Polygonum chinense extract and may serve as weed control agents.