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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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TL;DR: The following review aims to show that the pharmaceutical potential of this genus has been underestimated and deserves closer attention and gives a critical assessment of the literature to date.
Abstract: The genus Polygonum (Polygonaceae), comprising about 300 species, is distributed worldwide, mostly in north temperate climates, is interesting from both biological and phytochemical perspectives. In this review, a contemporary summary of biological and pharmacological investigate on Polygonum species will be presented and critically evaluated. Significant findings in the treatment various diseases such as snake-bites, inflammatory, anticancer, antibacterial, antivirus, antiseptic, antifungal, diabetic, hypertension, hyperlipemia, jaundice, hemorrhage, cough, fever, ulcers, skin affections, anemia, diarrhea and various urologic disorders, have been presented in ethnobotanical reports and recent studies were performed on ethanol extracts for certain Polygonum species. Polygonum, the most important constituent isolated is known to possess anticancer activity. Very few additional data are available on the biological activities and cytotoxicity of pure compounds from Polygonum. Twenty-nine distinguished species of Polygonum have been reported in scientific literature as ethnobotanically used or phytochemically investigated. However, information about a chemical outline is available only for few species. The following review gives a critical assessment of the literature to date and aims to show that the pharmaceutical potential of this genus has been underestimated and deserves closer attention.
22 citations
TL;DR: In this paper, the authors examined the phytoextraction ability of two hyperaccumulators Phytolacca americana L. (Phytolaccaceae) and Polygonum hydropiper L.(Polygonaceae) in real soils contaminated with heavy metals using hydroponics tests.
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.
22 citations
TL;DR: It is now possible to distinguish American Polygonum species by leaf characters alone and to discourage the theory that it is an abortive structure produced by a hybrid between glandular and non-glandular species.
Abstract: A B S T R A C T A systematic study of leaf morphology and anatomy of native, aquatic Polygonum species is presented, treating 60 populations propagated in a common greenhouse On the basis of this study it is now possible to distinguish American Polygonum species by leaf characters alone Taxa in section Persicaria are contrasted and also compared with representatives of sections Bistorta and Echinocaulon A complete description, utilizing 40 leaf characters, is given for each taxon Complex glands, designated valvate chambers, are shown to be a consistent feature of the P punctatum species-complex, whereas epidermal storage-idioblasts are present only in certain populations of this group All other species lack valvate chambers but possess idioblasts, which may reach a frequiency of over 400/mm2 in P hirsutum The plate-like multicellular gland of P opelousanum is found to occur sporadically in P hydropiperoides, thereby losing its specific diagnostic value Illucidation of the characteristic structure of this gland, however, lends evidence to discourage the theory that it is an abortive structure produced by a hybrid between glandular and non-glandular species Reticulate venation and unicellular trichomes separate members of section Bistorta from the smartweeds, but P meisnerianum (section Echinocauilon) is shown to simulate leaf struicture of the persicarias both internally and externally
22 citations
TL;DR: The recent investigation of Polygonum lapathifolium afrorded in addition to several known chalcones, a new isoflavanone, a dihydrochalcone and three chalcone derivatives.
22 citations
TL;DR: The population consisted of a relatively tolerant and a sensitive group and was indicated by differences in lifetime of plants treated with 500 mg kg-1 and by a diversification in biomass of individuals dying from treatment with 315 mgkg-1.
22 citations