A comparative study on the free radical scavenging activities of some fresh flowers in southern China

Youwei, Zeng; Zhao, Jun; Peng, Yun

doi:10.1016/j.lwt.2007.10.010

Cited by 54 publications

(24 citation statements)

References 40 publications

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“…It has been shown that rose is a fairly good source of aromatics, phenolics, terpenoids, fatty acid derivatives, sugars, and other polar compounds (Hashidoko 1996). Our earlier research found rose to be one of the most effective free radical scavengers, and polyphenolics had a significant correlation with free radical scavenging activity (FRSA) (Youwei et al 2004;Liangxiong et al 2005). These results were supported by Cho et al…”

Section: Introductionmentioning

confidence: 97%

Changes in antioxidant activity inRosa rugosaflowers at different stages of development

Youwei

Peng

2007

New Zealand Journal of Crop and Horticultural Science

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Free radical scavenging activities (FRSA) of the crude aqueous extracts from Rosa rugosa fresh flowers at different developmental stages on l, l-diphenyl-2-picrylhydrazyl (DPPH), superoxide and hydroxyl free radicals, and their polyphenolic concentration, were investigated. FRSA ranged from 73.5% to 40.2% for DPPH, from 32.2% to 14.3% for hydroxyl, and from 84.6% to 78.0% for superoxide. The polyphenolic concentration varied from 19.8 to 6.9 mg catechin equivalents (CE)/g fresh weight (FW). There was a reduction in FRSA for DPPH and hydroxyl, as well as polyphenolic concentration. The decrease in polyphenolic concentration was positively correlated with declines in free radical scavenging of DPPH (r 2 = 0.961, P < 0.01) and hydroxyl free radicals (r 2 = 0.993, P < 0.01). These results demonstrated a close link between rose development, polyphenolic concentration, and antioxidant activity with stage 1 exhibiting the best polyphenolic concentration and free radical scavenging potential.

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Section: Introductionmentioning

confidence: 97%

Changes in antioxidant activity inRosa rugosaflowers at different stages of development

Youwei

Peng

2007

New Zealand Journal of Crop and Horticultural Science

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“…Natural antioxidants occur in all parts of the plant (wood, bark, stems, pods, leaves, fruit, roots, flowers, pollen, and seeds) (Pratt, 1992). Flower is an important part of a plant which contains a great variety of natural antioxidants, such as phenolic acids, flavonoids, anthocyanin and many other phenolic compounds (Kaur, Alamb, Jabbar, Javed, & Athar, 2006;Youwei, Jinlian, & Yonghong, 2008).…”

Section: Introductionmentioning

confidence: 99%

Potential health enhancing properties of edible flowers from Thailand

Kaisoon¹,

Konczak²,

Siriamornpun³

2012

Food Research International

140

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“…However, to characterize a substance as an antioxidant, its interaction with an oxygen species directly responsible for oxidative damage should be assessed. Some of these plants have been shown to scavenge superoxide and hydroxyl radical (Wenli et al, 2004;Youwei et al, 2008), and to interact with nitric oxide (Lee et al, 2005). However, extensive literature survey reveals that studies evaluating their antioxidant ability against peroxyl radical are scarce.…”

Section: Introductionmentioning

confidence: 99%

Peroxyl radical scavenging capacity of extracts and isolated components from selected medicinal plants

et al. 2010

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We determined the ability of extracts and active components isolated from nine medicinal plants, Poncirus trifoliata, Astragalus membranaceus, Magnolia obovata, Salvia miltiorrhiza, Angelica dahurica, Cornus officinalis, Cnidium officinale, Pueraria lobata and Ostericum koreanum, to neutralize peroxyl radicals using the total oxyradical scavenging capacity (TOSC) assay. Peroxyl radicals were generated from thermal homolysis of 2,2'-azobis(2-methylpropionamidine) dihydrochloride, which oxidize alpha-keto-gamma-methiolbutyric acid to yield ethylene, and the TOSC of the substances tested is quantified from their ability to inhibit ethylene formation. Extracts from S. miltiorrhiza, M. obovata and P. lobata were determined to be potent peroxyl radical scavenging agents with a specific TOSC (sTOSC) being at least threefold greater than that of glutathione. Major constituents of the three plants, tanshinone, cryptotanshinone, 15,16-dihydrotanshinone, syringin, honokiol, magnolol, daidzein, puerarin and genistein, were examined for the antioxidant potential toward peroxyl radical. Puerarin and genistein were shown to have microM sTOSCs at least ten-fold greater than sTOSC of glutathione. Daidzein, syringin and honokiol demonstrated the peroxyl radical scavenging capacity comparable to that of glutathione. The implication of peroxyl radical in lipid peroxidation and other cellular damage suggests a possible protective role for the extracts and isolated components in oxidative stress caused by this reactive oxygen species.

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A comparative study on the free radical scavenging activities of some fresh flowers in southern China

Cited by 54 publications

References 40 publications

Changes in antioxidant activity inRosa rugosaflowers at different stages of development

Changes in antioxidant activity inRosa rugosaflowers at different stages of development

Potential health enhancing properties of edible flowers from Thailand

Peroxyl radical scavenging capacity of extracts and isolated components from selected medicinal plants

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