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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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Journal ArticleDOI
TL;DR: Two new stilbene glycoside gallates proanthocyanidins have been isolated from Polygonum multiflorum as discussed by the authors and were shown to be 2″-3″-O-monogalloyl esters of 2,3,5,4′-tetrahydroxystilbinene 2-Oβ-β-d -glucopyranoside.

77 citations

Journal ArticleDOI
TL;DR: Investigation of how elevated CO2 influenced reproduction and growth of plants exhibiting a range of floral morphologies, the implications of shifts in allocation for fitness in these species, and whether related taxa would show similar patterns of response found them to be diverse.
Abstract: In assessing the capacity of plants to adapt to rapidly changing global climate, we must elucidate the impacts of elevated carbon dioxide on reproduction, fitness and evolution. We investigated how elevated CO2 influenced reproduction and growth of plants exhibiting a range of floral morphologies, the implications of shifts in allocation for fitness in these species, and whether related taxa would show similar patterns of response. Three herbaceous, annual species each of the genera Polygonum, Ipomoea, and Cassia were grown under 350 or 700 ppm CO2. Vegetative growth and reproductive output were measured non-destructively throughout the full life span, and vegetative biomass was quantified for a subsample of plants in a harvest at first flowering. Viability and germination studies of seed progeny were conducted to characterize fitness precisely. Early vegetative growth was often enhanced in high-CO2 grown plants of Polygonum and Cassia (but not Ipomoea). However, early vegetative growth was not a strong predictor of subsequent reproduction. Phenology and production of floral buds, flowers, unripe and abscised fruits differed between CO2 treatments, and genera differed in their reproductive and fitness responses to elevated CO2. Polygonum and Cassia species showed accelerated, enhanced reproduction, while Ipomoea species generally declined in reproductive output in elevated CO2. Seed "quality" and fitness (in terms of viability and percentage germination) were not always directly correlated with quantity produced, indicating that output alone may not reliably indicate fitness or evolutionary potential. Species within genera typically responded more consistently to CO2 than unrelated species. Cluster analyses were performed separately on suites of vegetative and reproductive characters. Some species assorted within genera when these reproductive responses were considered, but vegetative responses did not reflect taxonomic affinity in these plants. Congeners may respond similarly in terms of reproductive output under global change, but fitness and prognoses of population persistence and evolutionary performance can be inferred only rarely from examination of vegetative characters alone.

77 citations

Journal ArticleDOI
TL;DR: Six species are regarded as having surely been deliberately collected and used in human diet: Polygonum lapathifolium, Chenopodium album, Spergula arvensis, Fallopia convolvulus, Bromus secalinus and Glyceria fluitans, and another two, Setaria sp.
Abstract: New investigations of two archaeobotanical finds are presented: a large assemblage of pure fruits of Polygonum lapathifolium from Bremen-Strom, Germany and the gut contents of a bog body from Kayhausen near Oldenburg, Germany. The general question is to find out for sure which herb species were intentionally gathered for human consumption. To accept species as such, they have to fulfil mainly two criteria: they must occur in large and pure assemblages, separated from other species, and they should occur regularly in the stomach or gut of dead bodies. To ensure this, the data from all bog bodies whose intestines have been examined were compiled and in addition to this, fossil assemblages of the species in question were put together. It turned out that apart from gathering in the wild, the collection of seeds and fruits from weeds in the process of crop cleaning was a major source of their edible diaspores. Obviously some common weeds, obtained in this way, were welcome as an addition to human diet and received the status of secondary cultivated plants. The following six species are regarded as having surely been deliberately collected and used in human diet: Polygonum lapathifolium, Chenopodium album, Spergula arvensis, Fallopia convolvulus, Bromus secalinus and Glyceria fluitans. Another two, Setaria sp. and Rumex acetosella probably complete this list.

72 citations

Journal ArticleDOI
TL;DR: In this article, the leaves of Polygonum hydropiper, a culinary herb, were identified as 7,4'-dimethylquercetin, Ib as 3'-methyl quercetIN, Ic as quercETIN, and the flavonoid glucoside Id as isoquercitrin on the basis of chemical and spectroscopic evidence.
Abstract: Antioxidative flavonoids and flavonoid glucoside were isolated from the leaves of Polygonum hydropiper, a culinary herb. The flavonoid Ia was identified as 7,4'-dimethylquercetin, Ib as 3'-methylquercetin, Ic as quercetin, and the flavonoid glucoside Id as isoquercitrin on the basis of chemical and spectroscopic evidence. The antioxidative activities measured by a ferric thiocyanate method were in the order Id>Ia>Ic>Ib

70 citations

Journal ArticleDOI
15 Nov 1976-Botany
TL;DR: An experimental study of water dispersal of these species revealed several adaptive features and the presence and condition of the perianth, degree of water turbulence, and achene size are factors which determine the duration of buoyancy.
Abstract: The annual smartweeds Polygonum lapathifolium L., P. pensylvanicum L., and P. persicaria L. grow on alluvial river bars during the summer and autumn when their substrate is free of flood waters and...

69 citations


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Performance
Metrics
No. of papers in the topic in previous years
YearPapers
202333
2022109
202114
202037
201937
201856