Showing papers on "Polygonum published in 2013"

In vitro biological effects of two anti-diabetic medicinal plants used in Benin as folk medicine.

Abstract: Extracts from Polygonum senegalensis (Polygonaceae) and Pseudocedrela kotschyi (Meliaceae) are two important traditionally used medicinal plants in rural Benin to treat many diseases and notably type 2 diabetes. The aim of the study was to investigate the α-glucosidase inhibition, antioxidant and antibacterial activities of those plants extract: Polygonum senegalensis leaves, and Pseudocedrela kotschyi root. Hydro-alcoholic (50%) extracts were analyzed for their phytochemical content and tested for their inhibition potency on α-glucosidase from Saccharomyces cerevisiae. Antioxidant activities were assessed using the DPPH, ORAC, FRAP and DCFH-DA (cell based) assay. Finally, the antibacterial activity was evaluated using MIC determination on four Gram-positive cocci (Bacillus subtilis, Clostridium difficile, Enterococcus faecalis, Staphylococcus aureus), three Gram-negative bacilli (Escherichia coli, Pseudomonas aeruginosa, Klebsiella pneumoniae), and the yeast Candida albicans. Each extract presented significant α-glucosidase inhibition and antioxidant activities. Polygonum senegalensis leaf extracts were the most active in each in vitro assay with an IC50 = 1.5 μg/ml for α-glucosidase inhibition and an IC50 = 6.8 μg/ml for DPPH scavenging, - 4.5 μmol Fe II/g of dry matter - 9366 μmol Trolox / g DW - for FRAP and ORAC values, respectively. IC50 = 2.3 μg GA / ml for DCFH-DA assay. Concerning its antibacterial activity, a growth inhibitory effect was observed only against three Gram negative bacilli: B. subtilis, E. faecalis, S. aureus and the yeast C. albicans at high concentration. The results showed that the semi alcoholic extract of the two studied plants possess α-glucosidase inhibitory activity, antioxidant potency, and low antibacterial effect.

Isolation, characterization, and antimicrobial activity of endophytic bacteria from Polygonum cuspidatum

Abstract: Polygonum cuspidatum Sieb. et Zucc. is a traditional Chinese medicinal plant that produces polydatin, a glycosylated derivative of resveratrol. Thus far, 244 prokaryotic endophytes have been isolated and identified from P. cuspidatum using 16s rDNA sequence. The results show that the endophytic bacteria in P. cuspidatum belong to five orders, namely, Actinomycetales, Bacillales, Rhizobiales, Pseudomonadales, and Enterobacteriales. At the genus level, 244 strains were identified, including Lysinibacillus, Paenibacillus, Pseudomonas, Bacillus, Kocuria, Streptomyces, Providencia, Rhizobium, Leucobacter, Brachybacterium, and Mycobacterium. These bacteria were classified into 36 groups based on their 16s rDNA sequence. The endophytic bacteria isolated from P. cuspidatum show inhibitory activity against pathogenic fungi and bacteria. Among them, 13 isolates showed inhibitory activity against Gibberella fujikuroi, 18 isolates againstAspergillus niger, 6 isolates against Aspergillus fumigatus, 4 isolates against Klebsiella pneumoniae, 12 isolates against Staphylococcus aureus, and 6 isolates against Bacillus subtilis. However, none of the bacteria inhibited Escherichia coli. Key words: Polygonum cuspidatum, endophytic bacteria, phylogenetic analysis,antimicrobial activity.

Antiproliferative activity of polygonaceae species from the Carpathian Basin against human cancer cell lines.

Abstract: Aqueous and organic extracts of 27 selected species from five genera (Fallopia, Oxyria, Persicaria, Polygonum and Rumex) of the family Polygonaceae occurring in the Carpathian Basin were screened in vitro for antiproliferative activity against HeLa (cervix epithelial adenocarcinoma), A431 (skin epidermoid carcinoma) and MCF7 (breast epithelial adenocarcinoma) cells, using the 3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide assay. A total of 196 n-hexane, chloroform, 50% methanol or water extracts of different plant parts were investigated. It was found that extracts of Polygonum hydropiper, Rumex acetosa, Rumex alpinus, Rumex aquaticus, Rumex scutatus and Rumex thyrsiflorus at 10 or 30 µg/mL demonstrated substantial cell growth inhibitory activity (at least 50% inhibition of cell proliferation) against one or more cell lines. R. acetosa and R. thyrsiflorus proved to be the most active and are considered worthy of activity-guided phytochemical investigations. Copyright © 2012 John Wiley & Sons, Ltd.

Screening of biological activities of Polygonum maritimum L. from Algerian coast.

Abstract: Objective To investigate the antioxidant and the antibacterial activities of crude extract from aerial part of Polygonum maritimum L. (Polygonaceae) (P. maritimum) and to find new actives biomolecules.

Investigation of manganese tolerance and accumulation of two Mn hyperaccumulators Phytolacca americana L. and Polygonum hydropiper L. in the real Mn-contaminated soils near a manganese mine

Abstract: Up to date, very few studies have examined the phytoextraction ability of hyperaccumulators in the real soils contaminated with heavy metals following the identification of the hyperaccumulators using hydroponics tests. In the present study, amended with a chemical-mobilizing agent of ethylene diamine triacetic acid (EDTA), the manganese accumulation, tolerance and the hyperaccumulating ability of two hyperaccumulators Phytolacca americana L. (Phytolaccaceae) and Polygonum hydropiper L. (Polygonaceae) proved by previous hydroponics tests were examined using pot experiments with paddy soils contaminated with Mn (1,047 ± 53 mg kg−1) collected from one site in the vicinity of one manganese mine in Xiushan county of Chongqing, China. Results showed that the root and shoot biomass of P. americana and the chlorophyll production of P. hydropiper were significantly inhibited by EDTA treatments while the chlorophyll production of P. americana was oppositely obviously promoted by EDTA. It is noteworthy that, with or without EDTA treatment, the shoot Mn concentrations of both plant species were significantly below the hyperaccumulator threshold, indicating these two plants concealed their hyperaccumulating ability in the studied soils. Thus, further detailed studies need to be conducted to promote the metal hyperaccumulating capacity of these two plant species under comparably low Mn-contaminated soil conditions as shown in this study before the successful application of these Mn hyperaccumulators identified in laboratories to the phytoextraction of lightly or moderately Mn-contaminated agricultural soils.

Polyphenols from aerial parts of Polygonum bellardii and their biological activities.

Abstract: Context: Polygonum species have been used in the treatment of several types of inflammatory disorders and cancer. Nevertheless, there are no reports related to the anti-inflammatory and anti-proliferative activities of Polygonum bellardii All. (Polygonaceae).Objective: This study investigated the chemical composition of the methanol extract of P. bellardii. The anti-inflammatory and cytotoxic activities of methanol, n-butanol, ethyl acetate extracts and isolated polyphenols were determined.Materials and methods: The chemical structure of the isolated compounds was elucidated using different spectral techniques. MTT assay was used to evaluate the anti-proliferative activity in HeLa, MCF-7 and HepG-2 cells. Inhibition of 5-lipoxygenase (5-LOX) activity and prostaglandin E2 (PGE2) production in stimulated HepG-2 cells were used to assess the anti-inflammatory activity.Results: The present study resulted in isolation of five compounds (new for the species). They were identified as gallic acid (1), que...

High-yield planting technology for polygonum multiflorum

Abstract: The invention discloses a high-yield planting technology for polygonum multiflorum. The technology comprises selection and preparation of land, seedling raising and propagation, field planting, field management, pest control, harvesting and the like. According to the technology, botanical insecticide is sprayed to prevent insect attacks, so that insect attacks of polygonum multiflorum can be reduced greatly, the growth environment of konjak is purified, the usage of chemical pesticide is reduced, and the ecological environment is protected. The planting technology has the advantages of being simple and easy to implement, high in practicability, low in cost, convenient to manage, applicable to large-area popularization and planting and capable of improving the rate of survival of artificially-planted polygonum multiflorum and greatly improving the yield and the quality of artificially-planted polygonum multiflorum simultaneously.

Planting method of polygonum multiflorum

Abstract: The invention discloses a planting method of polygonum multiflorum. The planting method comprises the steps of soil preparation, cuttage breeding, field operation, disease and pest prevention and control and harvesting processing. Soil conditioners are added into soil of planting land, and then, seeding substances are paved on the surface layer. When the method is used for planting the polygonum multiflorum, the acre yield of the polygonum multiflorum is high, the quality is high, and the pest and disease damage is little.

Plant growth inhibitory terpenes from Eupatorium adenophorum leaves

Abstract: Eupatorium adenophorum is commonly known as Crofton weed, growing widely throughout the northern hilly terrains. Bioactive potential of E. adenophorum leaves was investigated through phytochemical study and in vitro plant growth inhibitory. Essential oil was hydrodistilled from leaves and analyzed by GCMS. Leaf material was extracted using cold extraction process followed by evaporation of solvent under reduced pressure. Five cadinene sesquiterpenes and one sterol were isolated from hexane and EtOAc concentrates and their structures were established spectroscopically. Plant growth inhibitory activity of extractives and isolated terpenes were studied against different seeds of weed and crops . Essential oil was moderate seedling growth inhibitor. Among various extracts, EtOAc extract was found to be most inhibitory to Phalaris minor seeds (EC 50 117 μg mL -1 ). Among the sesquiterpenes, 5,6-dihydroxycadinan-3-ene-2,7-dione was found to be most active and inhibited both shoot and root growth of Phalaris minor seed (EC 50 97 μg mL -1 ) and Polygonum plebejum (EC 50 117 μg mL -1 ).

Uptake of more important mineral components by common field weeds on loess soils

Abstract: We have determined the contents of N, P, K, Ca, Mg, Na, Fe, Cu, Mn and Zn in winter wheat, spring barley, sugar beets and winter rape, as well as in the most common weed species infesting these crops. It was established that the percentage of mineral components in the dry matter of the majority of weeds is higher than in that of the cultivated plants. The most dangerous weed species competing with plants for the investigated nutrients were: Chenopodium album, Cirsium arvense, Convolvulus arvensis, Polygonum convolvulus, Sonchus arvensis and Stellaria media .

Passive Reestablishment of Riparian Vegetation Following Removal of Invasive Knotweed (Polygonum)

Abstract: Japanese knotweed and congeners are invasive to North America and Europe and spread aggressively along rivers establishing dense monotypic stands, thereby reducing native riparian plant diversity, structure, and function. Noxious weed control programs attempt to eradicate the knotweed with repeated herbicide applications under the assumption that the system will recover to a native assemblage which will inhibit future invasions. However, eradication efficacy studies typically only measure the amount of knotweed reduced, not the reestablished species diversity or plant origins. For a community scale efficacy study, we measured vascular plant species diversity and cover in riparian areas along five rivers in Washington State, 3 to 6 years after Bohemian knotweed was initially treated with herbicide. Plant species composition was compared between riparian sites treated to remove knotweed and reference sites where knotweed was absent. Sites where knotweed had been removed had significantly more exoti...

Method for planting polygonum multiflorum

Abstract: The invention discloses a method for planting polygonum multiflorum The method comprises the steps as follows: selecting land, raising seedlings by cutting, watering, applying fertilizer and racking In the step of raising the seedlings by cutting, the plant spacing is 3 cm, the row distance is 10 cm, and upper sections of cuttage branches are exposed out of the earth surface by 3 cm after earthing According to the method, the plant spacing is defined to be 3 cm, the row distance is defined to be 10 cm, and the upper sections of the cuttage branches are required to be exposed out of the earth surface by 3 cm after earthing in the step of raising the seedlings by cutting, so that not only can the polygonum multiflorum completely absorb nutrients, water and sunlight, but also land resources, water resources and fertilizers and the like can be saved to the greatest extent, the planting cost is reduced and the yield is increased at the same time According to the statistics, after the method is adopted, the dry weight of the yield per mu (1 mu is 1/6 of acre) of the planted polygonum multiflorum can reach 2200-2600 kg/mu, and the yield per mu of the planted polygonum multiflorum is increased by 30% relative to that of the conventional planted polygonum multiflorum, so that the method is suitable for large-scale planting

Pest control method for efficient cultivation of polygonum multiflorum

Abstract: The invention discloses a pest control method for efficient cultivation of polygonum multiflorum, which comprises agricultural control, physical control, biological control and chemical control. The agricultural control comprises the following steps: in summer and autumn, after harvesting the last batch of crops, deep ploughing and drying upturned soil in time, exposing and drying the soil, wherein the thickness of deep ploughing is 25-30 cm, and the exposing and drying time is 30 days. By the method that in summer and winter, after harvesting the last batch of crops, the upturned soil is deeply ploughed and dried in time, and the soil is exposed and dried, wherein the thickness of deep ploughing is 25-30 cm, and the exposing and drying time is 30 days, germs invading polygonum multiflorum plants can be conveniently controlled; and thus the control efficiency is improved. The ploughing depth can reduce requirements to the ploughing tools and machines. In addition, the exposing and drying time is limited to be 30 days, which not only cannot enable the nutritional components in the soil to be lost, but also can improve the physical behaviors of the soil, reduce influence of the pest and disease damage to polygonum multiflorum, ensure the emergence rate of polygonum multiflorum, and improve the output of polygonum multiflorum.

Planting method for producing polygonum multiflorum agricultural products

Abstract: The invention belongs to the technical field of agricultural product production and provides a planting method for producing polygonum multiflorum agricultural products. The planting method is a production method for fruit agricultural products and fungus agricultural products and is characterized by comprising the following steps: planting and culturing the polygonum multiflorum agricultural products according to two steps of using a biological-organic fertilizer prepared by polygonum multiflorum dregs in an adaptive phase and injecting a polygonum multiflorum extract nutritional solution with high concentration in an affinity phase so as to increase the conveyed and absorbed dosage of an active ingredient of the polygonum multiflorum; meanwhile, adjusting the formulas of the polygonum multiflorum dreg biological-organic fertilizer and a culturing basic material according to differences between the fruit agricultural products and the fungus agricultural products; and preparing the polygonum multiflorum dreg biological-organic fertilizer and the culturing basic material, so as to realize the production of the polygonum multiflorum agricultural products. The agricultural products planted and cultured through the adoption of the method provided by the invention have flavors of the original agricultural products and also have flavors and a healthcare function of the polygonum multiflorum.

An ecological study of endemic plant polygonum istanbulicum keskin and its environs

Abstract: In this study, some ecological features of narrow endemic Polygonum istanbulicum Keskin, which was established as a new plant species in 2009, and its environs were examined. There are 41 known Polygonum taxa in Turkey and the genus is represented by 14 species in Istanbul. Plant and soil samples were collected from the place where the species merely lives in

Polygonum multiflorum biofertilizer and preparation method and application thereof

Abstract: The invention discloses a polygonum multiflorum biofertilizer, and a preparation method and application thereof. The polygonum multiflorum biofertilizer is prepared by the following raw materials in parts by weight: 1500 parts of farmyard manure, 4.5 parts of quicklime, 18-22.5 parts of microbial inoculum, 200 parts of calcium magnesium phosphate fertilizer, 60 parts of urea, 6 parts of borax fertilizer, 14 parts of potassium sulphate fertilizer, 6 parts of manganese sulfate fertilizer and 0.5 parts of sodium molybdate fertilizer. The prepared polygonum multiflorum biofertilizer uses phosphate-solubilizing and potassium-solubilizing microoganisms to resolve indissolvable phosphorus and potassium in soil, the soil fertility is improved, phosphorus and potassium are absorbed and used by polygonum multiflorum, and consumption of the fertilizer is reduced. The raw material of the polygonum multiflorum biofertilizer, the microbial inoculum, can also be used for producing a phytohormone substance to stimulate and regulate growth of the polygonum multiflorum, the polygonum multiflorum grows strongly, the nutritional status is further improved, and further the yield and quality of the polygonum multiflorum are increased and improved.

Water tissue, disposable absorbent products compring extracts of polygonum tinctorium and dendropanax morbifera & manufacturing method thereof

Abstract: PURPOSE: Wet tissue and disposable absorbent articles including extract of Polygonum indigo and Dendropanax morbifera as an active ingredient are provided to have the antibacterical activity and ammonia gas adsorption, and to have an excellent effect on prevention and treatment of skin diseases including atopic dermatitis, contact dermatitis and diaper eczema CONSTITUTION: Wet tissue and disposable absorbent articles including extract of Polygonum indigo and Dendropanax morbifera as an active ingredient includes extract of at least one between Polygonum indigo and Dendropanax morbifera In case of the mixing extract including both Polygonum indigo and Dendropanax morbifera, the extract extracted with mixing any one between Polygonum indigo and Dendropanax morbifera at 10-70 weight% compared to the other one [Reference numerals] (S100) Preparing and washing leaves, fruits, skins, and roots of indigo plant and Dendropanax morbiferus; (S200) Crushing; (S300) First extraction; (S400) Second extraction; (S500) Spraying or dipping extracts; (S600) Packaging products

Polygonum multiflorum for promoting hair to be black and method thereof

Abstract: PURPOSE: A liquor containing Polygonum multiflorum, and a method for manufacturing the same are provided to quickly obtain the liquor, to commercialize through process standardization and mass production, and to control alcohol content. CONSTITUTION: A method for manufacturing a liquor containing Polygonum multiflorum comprises: a step of cutting and steaming Polygonum multiflorum roots, and drying to a water content of 5% or less to prepare a primary dried fragment of Polygonum multiflorum(10); a step of dipping the fragment in soybean water for 20-30 hours, and drying to a water content of 5% or less to prepare a fragment of Polygonum multiflorum(20); a step of preparing hard-boiled rice and seeding seed malt, and wrapping for 40-56 hours to prepare ipguk(Japanese koji)(30); a step of adding the ipguk to water in a weight ratio of 1:14-16, and culturing for 3-5 days; a step of adding ipguk and water in a weight ratio of 1:1.3-1.7, and fermenting to prepare a primary fermentation(40); a step of pulverizing water-soaked rice, mixing with nuruk, a purified enzyme agent, and water, and fermenting for 10 hours(50) to prepare a secondary fermentation; a step of mixing the primary and secondary fermentations in a weight ratio of 1:1.2-1.5, and filtering to prepare soju; a step of distilling the soju, and aging in a jar for 10 hours; and a step of extracting 60-80g of fragment of Polygonum multiflorum in 1L of purified soju for 30 days or more(60). [Reference numerals] (10) Primary Beopje step; (20) Secondary Beopje step; (30) Ipguk(Japanese koji) preparing step; (40) Primary mashing step; (50) Secondary mashing step; (60) Polygonum multiflorum liquor completing step

Polygonum multiflorum extract with excellent water solubility and preparation method thereof

Abstract: The invention discloses a polygonum multiflorum extract with excellent water solubility and a preparation method thereof. The preparation method comprises following steps: 1) polygonum multiflorum, which is taken as a raw material, is grinded and is subjected to reflux extraction with ethanol so as to obtain an extracting solution, the extracting solution is condensed and ethanol is recycled so as to obtain a concentrated solution, wherein the concentration of ethanol is 45-55%; 2) a compound enzyme is added into the concentrated solution, the mixture is subjected to enzymatic hydrolysis for 3 to 5h at a temperature of 40 to 50 DEG C, the compound enzyme is killed after enzymatic hydrolysis, the mixture is centrifuged, and the supernatant is collected, wherein the weight of the compound enzyme is 0.2 to 0.3% of the weight of the raw material; 3) the supernatant is filtered with a ceramic membrane of 0.4 to 0.5 microns, and the filtrate is collected; 4) the filtrate is eluted by using a macroporous resin column, wherein firstly the macroporous resin column is eluted with water until the effluent is clear, and then is eluted by ethanol with a concentration of 60 to 70%, the eluate is condensed and dried, and the polygonum multiflorum extract with excellent water solubility is obtained. The content of stilbene glucoside in the polygonum multiflorum extract is 5 to 60%. The preparation method is capable of reducing the content of anthraquinone compounds and increasing the extraction efficiency of stilbene glucoside.

Method for processing polygonum multiflorum

Abstract: The invention discloses a method for processing polygonum multiflorum, which comprises the following steps: taking polygonum multiflorum, cutting into slices, steaming for 4-10 hours, drying or baking; taking black soya beans, adding water for stewing filtering to obtain filtering liquid, and concentrating to obtain black soya bean juice; and uniformly stirring the black soya bean juice and the polygonum multiflorum slices, steaming under a high pressure, and drying to form the polygonum multiflorum. The method for processing the polygonum multiflorum has the advantages that the processing time is greatly shorter than that of a normal pressure steaming method, meanwhile the process is simple, the production is easy, and the content of the obtained effective components is higher than that of the normal pressure steaming method.

Flavonoids from the Aerial Part of Polygonum hydropiper

Abstract: The known flavonoids pinostrobin (5-hydroxy-7-methoxyflavanone), onysilin (5-hydroxy-6,7-dimethoxyflavanone), 2′,6′-dihydroxy-3′,4′-dimethoxychalcone, and the new natural compound 2′,6′-dihydroxy-4′,5′-dimethoxychalcone (polygochalcone) were isolated from the aerial part of Polygonum hydropiper L. and characterized using PMR and UV spectroscopy and mass spectrometry.

Processing method of polygonum multiflorum tender tip tea

Abstract: The invention discloses a processing method of a polygonum multiflorum tender tip tea. The processing method comprises the following steps in sequence: picking polygonum multiflorum tender tips; washing through boiled water for 1 to 20 seconds; horizontally paving on a material which is relatively high in water permeability and has thickness of 1 to 3 centimeters such as bamboo parts or wooden parts; drying for 8 to 16 hours in the air; transferring into a pot; carrying out stir-frying, wherein alcohol with concentration of 95% is sprayed based on the ratio of 1000: (1-10), the firepower is changed from high to low, and the temperature is lowered from 150 to 40 DEG C; and stopping the stir-frying until the tea is completely dried. The polygonum multiflorum tender tip tea is free of bitter taste or has a little bitter taste, and the tea water is clear and delicious and can nourish blood and Yin, relax bowel and reduce insomnia and palpitation.

Antibacterial Activities of Nine Polygonaceae Plants

Abstract: Objective:To evaluate the antimicrobial activity of nine plants of Polygonaceae in vitroMethod:Disc diffusion methods and porous plate methods were used to evaluate the inhibitory activity of different extracts of nine Polygonaceae plants against Staphylococcus aureus(SA),Methicillin-resistant Staphylococcus aureus(MRSA) and ESBLs-SAResult:The results indicated that methanol extract of Polygonum capitatum DDon and ethyl acetate extract of Pcapitatum at the concentration of 50 g·L-1 had a larger inhibiting diameter than that of other extracts of plants,among them MIC in the ethyl acetate extract of Pcapitatum against SA,MRSA and ESBLs-SA was 0062 5 g·L-1The ethyl acetate extract of Phydropiper Lvar hispidum(JookF) Stewardshowed the highest inhibitory effect(IC50 045 g·L-1) in porous plate methodsConclusion:Results showed that nine plants extracts of Polygonaceae have better inhibitory activity against the tested bacteria,especially Pcapitatum and Phydropiper Lvar hispidum(JookF) Stewardshowed more significant antimicrobial activity