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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01 Jan 1995
TL;DR: In this article, the relationship between the allelochemicals, p-menthane-3,8-diols and the ontogenetic age in Eucalyptus citriodora was elucidated.
Abstract: The relationship between the allelochemicals, p-menthane-3,8-diols (cis and trans) and the ontogenetic age in Eucalyptus citriodora was elucidated. The diols in the soil from a Eucalyptus grove were analysed by chromatography. On the other hand, the root exudates from Polygonum sachalinense in a recirculating system significantly inhibited lettuce seedling growth. Bioassay of the neutral-acidic fraction on the TLC agar plate showed the inhibitory activity corresponded to the two yellow pigments. Two compounds were isolated and identified as anthraquinone compounds; emodin and physcion. The results indicate that these anthraquinones are responsible for the observed interference in nature and are potent allelochemicals
19 citations
TL;DR: A study of germination and seed dormancy in Polvgonum lapathifolium and method's of breaking this dormancy are reported and its causes investigated.
Abstract: Summary
The results of a study of germination and seed dormancy in Polvgonum lapathifolium L., P. persicaria L., P. hydropiper L., P. mite Schrank and P. minus Huds. are presented. Method's of breaking this dormancy are reported and its causes investigated.
19 citations
Patent•
07 Aug 2013
TL;DR: In this paper, a high-yield planting technology for polygonum multiflorum is presented, which includes selection and preparation of land, seedling raising and propagation, field planting, field management, pest control, harvesting and the like.
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.
19 citations
TL;DR: One new drimane-type sesquiterpenoid, 3 β-angeloyloxy-7-epifutronolide, and one new natural product, polygonumate, along with six known drimanes-type mixtures were isolated from the whole plant of Polygonum hydropiper Linn using spectroscopic techniques.
Abstract: One new drimane-type sesquiterpenoid, 3 β-angeloyloxy-7-epifutronolide (1), and one new natural product, polygonumate (2), along with six known drimane-type sesquiterpenes [dendocarbin L (3), (+) winterin (4), (+) fuegin (5), changweikangic acid A (6), futronolide (7), and 7-ketoisodrimenin (8)] were isolated from the whole plant of Polygonum hydropiper Linn. Their structures were determined using spectroscopic techniques. Single-crystal X-ray diffraction study on dendocarbin L (3) and ¹³C-NMR spectroscopic data of (+) winterin (4) are described for the first time. Compound 6 was evaluated for inhibitions of α-chymotrypsin, acetylcholinesterase, and butyrylcholinesterase enzymes.
19 citations
TL;DR: Four new stilbene derivatives, polygonumosides A-D (1-4), were isolated from the processed roots of Polygonum multiflorum and their structures were elucidated by spectroscopic analysis, including 1D and 2D NMR and ECD.
Abstract: Four new stilbene derivatives, polygonumosides A-D (1-4), were isolated from the processed roots of Polygonum multiflorum. Their structures were elucidated by spectroscopic analysis, including 1D and 2D NMR and ECD. Polygonumosides A (1) and B (2), possessing an unprecedented tetracyclic skeleton, were assigned as 2S- and 2R-2-(4-hydroxyphenyl)-9,10,11-trihydroxy-2H-benzo[c]furo[2,3-f]chromen-7(3H)-one-4-O-β-d-glucopyranosides, respectively, while polygonumosides C (3) and D (4) were assigned as a pair of diastereomeric stilbene glucoside dimers.
18 citations