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 plant showed the highest DPPH radical scavenging activity in polar (ethanol) extract for all the tissues tested and the non-polar extracts showed high antimicrobial activity against Methicillin-resistant Staphylococcus aureus compared to polar extracts.
Abstract: The aim of this research was to identify the volatile metabolites produced in different organs (leaves, stem and roots) of Polygonum minus, an important essential oil producing crop in Malaysia. Two methods of extraction have been applied: Solid Phase Microextraction (SPME) and hydrodistillation coupled with Gas Chromatography-Mass Spectrometry (GC-MS). Approximately, 77 metabolites have been identified and aliphatic compounds contribute significantly towards the aroma and flavour of this plant. Two main aliphatic compounds: decanal and dodecanal were found to be the major contributor. Terpenoid metabolites were identified abundantly in leaves but not in the stem and root of this plant. Further studies on antioxidant, total phenolic content, anticholinesterase and antimicrobial activities were determined in the essential oil and five different extracts. The plant showed the highest DPPH radical scavenging activity in polar (ethanol) extract for all the tissues tested. For anti-acetylcholinesterase activity, leaf in aqueous extract and methanol extract showed the best acetylcholinesterase inhibitory activities. However, in microbial activity, the non-polar extracts (n-hexane) showed high antimicrobial activity against Methicillin-resistant Staphylococcus aureus (MRSA) compared to polar extracts. This study could provide the first step in the phytochemical profiles of volatile compounds and explore the additional value of pharmacology properties of this essential oil producing crop Polygonum minus.
46 citations
TL;DR: It is suggested despite the large differences in viable seeds recovered, mallards may be important dispersers for the seeds of most species the authors studied and hypothesize that observed variation may be attributable to different plant strategies that relate to reproductive tactics and habitat type.
Abstract: Seed dispersal is an important process for plants, but may be particularly important for plants occurring in spatially isolated habitats like wetlands. Variation in the geographic distribution of wetland plant species may be strongly influenced by their ability to use waterbirds, particularly waterfowl to enhance dispersal. We used controlled feeding and germination experiments to investigate recovery, retention time, and germination for the seeds of 10 wetland plant species (Chenopodium album, Digitaria ischaemum, Echinochloa colonum, Echinochloa crusgalli, Eleocharis palustris, Panicum dichotomiflorum, Polygonum lapathifolium, Polygonum pensylvanicum, Rumex crispus, and Scheonoplectus maritimus) and compared how these metrics varied with seed characteristics. We fed a known number of seeds to captive raised mallards (Anas platyrhynchos) and collected fecal samples every 4 hours for 48 hours; all recovered seeds were planted in seedling trays and watched for 60 days to monitor germination. We co...
46 citations
TL;DR: The objective of this study was to compare the growth and short-term competitive performance of three species of Polygonum known to differ in flooding tolerance and life history.
Abstract: The objective of this study was to compare the growth and short-term (single season) competitive performance of three species of Polygonum known to differ in flooding tolerance and life history. Polygonum amphibium is a perennial with low sexual reproductive effort and a relatively high degree of flooding tolerance, P. lapathifolium is an annual species with a high sexual reproductive effort and a low tolerance to flooding, and P. hydropiperoides is intermediate to the other two in terms of sexual reproductive effort and flooding tolerance
44 citations
TL;DR: The results showed that sample preparation has significant effect on components in extracts of P. multiflorum especially the components related to hepatotoxic, and ethanol extract had much stronger hepatotoxicity than water extract.
44 citations
TL;DR: The present paper is a report on combined cytological and taxonomical studies of the genus Polygonum s.str.
Abstract: It is pointed out that cytological, palynological, and morphological investigations support the division of the collective genus Polygonum into natural units. The 13 sections of the collective genus are grouped into six natural genera, two of which include five and four sections, respectively, while the remaining four genera are monosectional. The present paper is a report on combined cytological and taxonomical studies of the genus Polygonum s.str. in eastern North America, including 25 taxa of the section Polygonum (= Avicularia) and one species of the section Duravia. The basic number of chromosomes of Polygonum s.str. is x = 10; all the chromosomes have an almost median centromere and thus cannot be morphologically distinguished from each other. The chromosome numbers within the group range from the diploid number 2n = 20 to the octoploid number 2n = 80. Nine species (12 taxa) are diploid; seven species (eight taxa) are tetraploid; four species (five taxa) are hexaploid, and one species is octoploid. ...
43 citations