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: The phylogenetic results revealed that several woody Polygonum species endemic to Iran formed a distinct clade, and are nested within Atraphaxis, which was the first diverging lineage as sister to an assemblage of these taxa and the bulk of Atraph axis species.
Abstract: The phylogenetic status of the genus Atraphaxis and its relationship with woody Polygonum species is examined based on nrDNA ITS and two chloroplast regions (matK and rpl32-trnL(UAG)). Morphological and palynological studies for the selected taxa are also performed. Our results revealed that several woody Polygonum species (namely P. spinosum, P.
aridum, P.
dumosum, P.
salicornioides, P. khajeh-jamali and P. botuliforme) endemic to Iran formed a distinct clade, and are nested within Atraphaxis. Atraphaxis ovczinnikovii, (=P.
ovczinnikovii), was the first diverging lineage as sister to an assemblage of these taxa and the bulk of Atraphaxis species. Three other woody Polygonum species (P. afghanicum, P. paronychioides and P. thymifolium) were nested within herbaceous Polygonum species. Ochrea and pollen characteristics corroborated the phylogenetic results as well. Based on molecular and morphological evidence, we transferred the aforementioned six Polygonum species into Atraphaxis. The newly delimited genus Atraphaxis is comprised of three lineages, corresponding to three new sections: Atraphaxis, Polygonoides and Ovczinnikovia. The different position of A. botuliformis (=P. botuliforme) in nrDNA ITS and combined chloroplast DNA analyses indicated that it had possibly experienced the hybrid or introgression for a long time. Taxonomic descriptions for Atraphaxis and its sections as well as the diagnostic key to sections and species occurring in Iran, are presented.
17 citations
17 citations
TL;DR: In this article, a sesquiterpene acid named viscozulenic acid (VSA) was obtained from methanol extract of Polygonum viscosum, the structure of which was unambiguously elucidated by UV, HR-EIMS and a series of 1D and 2D NMR experiments.
Abstract: High-performance liquid chromatographic analysis of a methanol extract of Polygonum viscosum has yielded a novel sesquiterpene acid, 6-hydroxy-4-methoxycarbonyl-7-(1-methylethyl)-3,3a,6,7,8,8a-hexahydroazulene-1-carboxylic acid (named viscozulenic acid) [1], the structure of which was unambiguously elucidated by UV, HR-EIMS, and a series of 1D and 2D NMR experiments.
16 citations
TL;DR: Bioassay-guided fractionation of an ethanolic extract of Polygonum amplexicaule led to the isolation of a hitherto unidentified compound, 5, 6-dihydropyranobenzopyrone (1) along with nine previously known compounds (2-10).
16 citations
Patent•
11 Jul 2003
TL;DR: In this paper, a kind of fresh polygonum capitatum extract and its medicine composition preparation was presented and used for curing the diseases of pyelonephritis and prostatilis.
Abstract: The present invention relates to a kind of fresh polygonum capitatum or dried polygonum capitatum extract and its medicine composition preparation. Said invention uses water, 75% ethyl alcohol and 95ethyl alcohol and utilizes CO2 supercritical extraction method to separately extract whole plant of polygonum capitatum, its aerial parts, leaf, seed, stem and root, and make activity research, and makes said extract into the medicine composition preparation tablet with obvious effect for curing the diseases of pyelonephritis and prostatilis, etc.
16 citations