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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TL;DR: In antimalarial, antimicrobial, anti-inflammatory, PPAR and cytotoxic assays, some compounds have demonstrated moderate inhibitory potentials.
26 citations
TL;DR: It is suggested that the clinical dose of drugs metabolized by human CYP2C9 or CYP3A4 may need to be adjusted in patients taking Polygonum capitatum, as this herbal medication may result in reduced effective concentrations of these drugs.
26 citations
TL;DR: In this paper, the roots of Polygonum bistorta L. afforded seven compounds including triterpenoids, a coumarin, and a steroid, the structures of which were identified by EIMS, 1H NMR, 13C NMR and DEPT experiments.
Abstract: Investigation of the roots of Polygonum bistorta L. afforded seven compounds including five triterpenoids, a coumarin, and a steroid, the structures of which were identified by EIMS, 1H NMR, 13C NMR, DEPT, and HMBC experiments. All the compounds have been isolated from Polygonum genus for the first time.
26 citations
TL;DR: The nature and extent of structural modifications which occur in Polygonum tissues when the plants become inundated are reported, offering more evidence to the theory that there is a cline of phenotypic plasticity in the species which corresponds roughly with the gradient in morphology.
Abstract: A B S T R A C T Cloning experiments were carried out in growth chambers to determine responses of members of the genus Polygonum (sect. Persicaria) to aquatic submergence. By using both external morphology and anatomical modifications, comparisons were made among 23 populations with respect to their preadaptations after a rise in water level. Varieties of P. amphibium L. responded quite differently to submergence, offering more evidence to the theory that there is a cline of phenotypic plasticity in the species which corresponds roughly with the gradient in morphology. Other than P. amphibium, the species most well adapted to aquatic conditions was P. densiflorum Meisn., a member of the P. punctatum Ell. complex. Populations of P. hydropiperoides Michx. showed a dichotomy of response which appeared to correlate with the habitats in which they were collected. A few species of Polygonum did not survive well after inundation, but most were capable of underwater growth, and were at least half as well adapted to aquatic conditions as was the most plastic variety, P. amphibium var. stipulaceum Colem. MEMBERS of the genus Polygonum exhibit a broad spectrum of morphological and anatomical preadaptation to changes in moisture conditions. Especially within section Persicaria, properties which show variation due to phenotypic modification have often been used inappropriately as diagnostic characters in systematics. With the exception of amphibious Polygonum, little attention has been devoted to the ephemeral nature of certain "key" characteristics of members of the group. The smartweeds also provide an excellent group in which to study evolutionary trends toward the aquatic habit in a family which is primarily terrestrial. This paper reports some of the results of experiments designed to determine the nature and extent of structural modifications which occur in Polygonum tissues when the plants become inundated. Although Gliick (1924) reported on one submergence study with P. hydropiper L., experimentation has been largely restricted to garden
25 citations
TL;DR: Four new dianthrone glycosides, named polygonumnolides C1-C4 (1–4), were isolated from the dried roots of Polygonum multiflorum Thunb and showed weak hepatotoxicity against L-02 cell lines.
25 citations