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 aphid genus Blackmania gen. nov. associated with Polygonum equisetiforme (Polygonaceae) from Israel and Cyprus is described and illustrated and the apterous viviparous female is figured for the first time.
Abstract: The aphid genus Blackmania gen. nov. is described. In the genus, B. eastopi sp. nov. associated with Polygonum equisetiforme (Polygonaceae) from Israel and Cyprus is described and illustrated. Morphologically, the new genus is similar to the genus Acaudella in respect to the lack of a cauda. Acaudella puchovi, associated with Atraphaxis caucasica (=A. buxifolia) and A. spinosa (Polygonaceae) from Uzbekistan and Israel, is re-described and the apterous viviparous female is figured for the first time. The lectotype and paralectotypes of A. puchovi are also designated. An identification key to known species of the tribe Macrosiphini without cauda is provided. The morphological separation of B. eastopi gen. nov., sp. nov. from A. puchovi is visualized using principal component analysis.
2 citations
28 Feb 1993
2 citations
Journal Article•
TL;DR: In this paper, the authors investigated the biotransformation of eight active constituents chemicals by hairy roots of Polygonum multiflorum Thunb and found that three of the eight active components were identified to be biOTransformed, which were furannoligularenone (6), 1,4-benzenediol (7), and artemisinin (8).
Abstract: Objective: To investigate the biotransformation of eight active constituents chemicals by hairy roots of Polygonum multiflorum Thunb. Methods: Active compounds were added to the culture system of hairy roots of P.multiflorum after precultured for 9 d, then they were co-cultured for another 7 d. The products were isolated and purified by column chromatography. Results: Three of the eight active constituents were identified to be biotransformed, which were furannoligularenone (6), 1,4-benzenediol (7) and artemisinin (8). HPLC analysis of the biotransformation of 6 showed two new peaks except the peak of substrate, then the corresponding two compounds were obtained; Substrate 7 was converted into arbutin. In the case of 8, there were two new peaks and the corresponding two monomers have been also isolated. Conclusion: The result showed that there were several enzymes in the culture system of P.multiflorum hairy roots, which could processed glycosylation, oxidation, reduction and hydroxylation reactions.
2 citations
Journal Article•
TL;DR: The phylogeny of Polygonum sect.Cephalophilon was analyzed using the chloroplast genes trnL-F,rbcL and nuclear ribosomal ITS sequences and there is strong conflict regarding the systematic position ofPolygonum delicatulum, which needs further studies.
Abstract: The phylogeny of Polygonum sect.Cephalophilon was analyzed using the chloroplast genes trnL-F,rbcL and nuclear ribosomal ITS sequences.Individual and combined analyses of three datasets were performed with maximum parsimony method and the gene trees were constructed with Rheum officinale as outgroup.The results show that Polygonum sect.Cephalophilon is a more natural group which is the most closely related to Polygonum sect.Persicaria,sect.Echinocaulon and the genus Antenoron.The results support to put Polygonum sect.Cephalophilon into the genus Persicaria as a section and transfer P.filicaule and P.cyanandrum from Polygonum sect.Cephalophilon to the genus Koenigia,do not support to attribute Polygonum sect.Echinocaulon to Polygonum sect.Cephalophilon.There is strong conflict regarding the systematic position of Polygonum delicatulum,which needs further studies.
2 citations
29 Jul 2011
TL;DR: It is concluded that polygonum flaccidum mesin is an efficient natural antioxidant and will be used on medicalhealthcare, medicine, industry of fine chemicals and agriculture widely.
Abstract: Traditional Chinese herbal medicine, polygonum flaccidum meisn, had a favourable development prospect on pesticide, medicine, veterinary drug and food additives. It was necessary to provide the theory evidence to make use of the valuable plant resources reasonably, promote the comprehensive development and utilization, and comprehend the content of active chemical composition and inoxidizality. In this paper, the active matter, naphtha, the content of polysaccharide and inoxidizality of polygonum flaccidum meisn were addressed. The experimental results show that the content of naphtha is 2.46 percent in fresh polygonum flaccidum meisn and the content of polysaccharide is 18.11 percent in dry one. The naphtha and the polysaccharide are able to remove the hydroxylradicals and superoxide anion radicals and the former works better the latter. Both perform worse than positive reference VC on inoxidizality. So we can draw a conclusion that polygonum flaccidum mesin is an efficient natural antioxidant and will be used on medicalhealthcare, medicine, industry of fine chemicals and agriculture widely.
2 citations