Antioxidant flavonoids from leaves of Polygonum hydropiper L.

Zhao, Peng; Strack, Dieter; Baumert, A.; Subramaniam, R.; Goh, Ngoh Khang; Chia, T. T.; Tan, Swee Ngin; Chia, Lian Sai

doi:10.1016/s0031-9422(02)00504-6

Cited by 169 publications

(119 citation statements)

References 11 publications

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“…Polygonum species that were efficient in our study have previously been shown to have various biological activities including antioxidant or antiparasitic effects due to their high phenolic and flavonoid contents (Kim et al, 1994;Peng et al, 2003;Hsu, 2006). Epilobium species have been shown to have high antimicrobial activity (Battinelli et al, 2001) and high macrocyclic tannin contents, mainly of oenothein.…”

Section: Discussionmentioning

confidence: 64%

Screening of plants from diversified natural grasslands for their potential to combine high digestibility, and low methane and ammonia production

Machebœuf

Coudert

Bergeault

et al. 2014

Animal

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A total of 156 plant species from 35 botanical families collected from diversified grasslands in the French Massif Central were screened in vitro for their potential to combine high nutritive value for ruminants and a reduced impact on the environment. The vegetative part of plants were analyzed for their chemical composition and incubated in a batch system containing buffered rumen fluid at 39°C for 24 h. The gas production and composition were recorded, and the fermentation end-product concentrations in the incubation medium and the in vitro true organic matter digestibility (IVTOMD) were determined. The results were expressed relative to perennial ryegrass (PRG) values used as a reference. We observed that no relationship between methane (CH 4 ) and volatile fatty acids (VFA) was evidenced for 12 plants, the fermentation of these plants producing significantly less CH 4 for a similar level of VFA production. In all, 13 plants showed 50% less CH 4 production per unit of organic matter truly digested (OMTD) than PRG. Among these plants, two reduced CH 4 by more than 80% and four species had an IVTOMD higher than 80%. The underlying modes of action seem to be different among plants: some result in an accumulation of H 2 in the fermentation gas, but others do not. In terms of nitrogen (N) use efficiency, the fermentation of 37 plants halved the ratio between ammonia (N-NH 3 ) and plant N content compared with PRG, of which six showed a complete absence of N-NH 3 in the medium. Among these plants, four maintained the IVTDMO at values not significantly different from PRG (P > 0.05). Considering the multi-criteria selection, 16 plants showed simultaneously a reduction of more than 80% in N-NH 3 production and 30% in CH 4 emission per unit of OMTD compared with PRG, including three with an IVTOMD higher than 80%. Overall, the botanical families that reduced simultaneously CH 4 and N-NH 3 most efficiently were the Rosaceae, Onagraceae, Polygonaceae and Dipsacaceae. The Onagraceae also gave high values for IVTOMD.

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Section: Discussionmentioning

confidence: 64%

Screening of plants from diversified natural grasslands for their potential to combine high digestibility, and low methane and ammonia production

Machebœuf

Coudert

Bergeault

et al. 2014

Animal

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“…Much effort has been made to clarify the chemical composition (Markova et al, 1985), and pharmacological capacity of plants belonging to this family. Flavonoids (Markova et al, 1985;Smolarz, 2002;Datta et al, 2000;Peng et al, 2003), quercetin and rutin (Datta et al, 2000;Fabjan et al, 2003;Liu and Zhu, 2007;Badamtsesteg, et al, 2003) have been isolated from some species. In addition, Polygonaceae plants are grown in large scale in Mongolia and, therefore, draw attention as potential rich sources of flavonoids.…”

Section: Introductionmentioning

confidence: 99%

Antioxidant Capacities and Total Quercetin Content of Several Species of Polygonaceae in Mongolia

Odbayar

Mikami

Watanabe

et al. 2010

FSTR

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Antioxidant capacities (AOCs) and total phenolic (TP) content of 11 species of Polygonaceae from Mongolia were evaluated using diphenyl picrylhydrazyl radical (DPPH), oxygen radical antioxidant capacity (ORAC) and Folin-Ciocalteu (F-C) assays. Additionally, total quercetin content was determined by high performance liquid chromatography (HPLC) after acid hydrolysis. These plant extracts showed high AOCs using both DPPH (111.9-950.5 μmol Trolox equivalent (TE) /g.dw) and ORAC assays (770.7-2307.9 μmol TE/g.dw), and high TP contents (20.84-113.86 mg Gallic acid equivalent (GAE)/g.dw). AOCs were positively correlated with TP content (DPPH: r = 0.98; ORAC: r = 0.83). Moderate correlations were observed between AOCs and total quercetin content (DPPH: r = 0.58; ORAC: r = 0.51). These results suggest that quercetin glycosides may be one of the important contributors to AOCs of Mongolian Polygonaceae species.

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“…Arabidopsis flavonoid mutants are hypersensitive to UV-B radiation, thus confirming the role of flavonoids and other phenolic compounds in the UV-B protection of plants (Li (Peng et al, 2003). Changes in flavonoid contents in wheat leaves have been observed under field conditions .…”

Section: Introductionmentioning

confidence: 68%

Advances in Crop Responses to Enhanced Uv-B Radiation

Li¹

2016

Appl Ecol Env Res

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The increased ultraviolet-B (UV-B) radiation (280-320 nm) on the Earth's surface is one of the most important concerns of global change. This concern is primarily because increased UV-B radiation has been unambiguously shown to be responsible for the majority of harmful effects on aquatic as well as terrestrial organisms, and thus influence ecological interactions. For the past 4 plus decades, many studies have been conducted on the damaging effects of elevated UV-B radiation on plants. These studies have shown a diverse range of responses to UV-B radiation, and might be in general arbitrarily divided into two classes, photomorphogenic and stress responses at the morphological, physiological, biochemical and molecular levels. Crop plants evolved different adaptive or defensive mechanisms to UV-B radiation, including accumulation of UV-absorbing sunscreens, production of enzymatic and non-enzymatic antioxidants, changes of phytohormones or activation of DNA-repairing enzymes. A diagram illustrating the general responses of UV-B radiation and complexity of the interactions among factors was developed. Three urgent specific researches are proposed, which might provide opportunities for genetic engineering and possibility of breeding to deal with potential crop yield reductions due to elevated UV-B in agricultural systems, and thus will play a major role in determining the crops future.

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Antioxidant flavonoids from leaves of Polygonum hydropiper L.

Cited by 169 publications

References 11 publications

Screening of plants from diversified natural grasslands for their potential to combine high digestibility, and low methane and ammonia production

Screening of plants from diversified natural grasslands for their potential to combine high digestibility, and low methane and ammonia production

Antioxidant Capacities and Total Quercetin Content of Several Species of Polygonaceae in Mongolia

Advances in Crop Responses to Enhanced Uv-B Radiation

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