Phenolics as Antioxidants

Grace, Stephen C.

doi:10.1002/9780470988565.ch6

Cited by 108 publications

(73 citation statements)

References 191 publications

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“…Because the electron reduction potential of their is lower than the electron reduction potential of oxygen radicals. 21,22 We determined total phenolic content of 6.674±0.0012 mg of Gallic acid equivalent/g. Phenolic acids amount of were determined respectively as caffeic acid 0.756 mg/ g, chlorogenic acid 6.882 mg / g, p-coumaric acid 1.968 mg/ g, rutin 8.661 mg/g, ellagic acid 12.783mg /g, catechin 34.821 mg/ g, myricetin 3.015 mg /g.…”

Section: Resultsmentioning

confidence: 99%

Investigation of Antioxidant Activity and Phytochemical Compositions of Celtis Tournefortii

Yildirim

Yılmaz²,

Kutlu

2017

FRA

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Context: Phytochemicals are non-nutritive plant chemicals that have protective or disease preventive properties. Because they have antioxidant property and protect our cells against oxidative damage. Aim: This work aimed to determination of phytochemical composition which total phenol content(TPC), total flavonoid content(TFC), total flavones content, alkaloid, acidity, pH, total carotenoid content, amount of carotene, β-carotene concentration, anthocyanin, amount of saponin and tannin, ascorbic acid levels, mineral profile and antioxidant activity of fresh Celtis tournefortii due to the importance of secondary metabolites. Material and method: Celtis tournefortii was used for this study Phytochemical compositions were determined by spectrometric methods excluding phenolic acid and mineral profile. Antioxidant activity were determined by different antioxidant method. Consequently: Celtis tournefortii may be an antioxidant source.

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Section: Resultsmentioning

confidence: 99%

Investigation of Antioxidant Activity and Phytochemical Compositions of Celtis Tournefortii

Yildirim

Yılmaz²,

Kutlu

2017

FRA

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“…These compounds play an important role in the control of many biological activities in plants, acting as, e.g. enzyme inhibitors, light-absorbing pigments, light screens, visual attractants for pollinators, regulators of plant growth, chemical signals in nodulation gene induction, as well as phytoalexins (Grace 2005; Szafrańska et al 2013). Moreover, applying exogenous plant polyphenols would be useful for stress alleviate both in plant and animal tissues (Posmyk et al 2008a, 2009a; Kolodziejczyk et al 2011; Saluk et al 2012, 2015).…”

Section: Discussionmentioning

confidence: 99%

Melatonin restricts Pb-induced PCD by enhancing BI-1 expression in tobacco suspension cells

Kobylińska

Posmyk

2016

Biometals

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Melatonin is a conserved substance, which was discovered in the evolutionary distant organisms like bacteria, plants, invertebrates and vertebrates. Recent studies have shown that melatonin despite its possible role in photoperiod processes, has been found to be a direct free radical scavenger and an indirect antioxidant. In this report the impact of exogenous melatonin on the Bax inhibitor-1 (BI-1) expression level in Nicotiana tabacum L. line Bright Yellow 2 (BY-2) suspension cells exposed to lead was examined. BI-1 is a well-conserved protein in plants and animals that serves as the inhibitor of mammalian proapoptotic proteins as well as plant ROS-induced cell death. Our results showed that pretreatment with 200 nm melatonin, expressing BI-1 and fortified tobacco suspension cells against damages induced by lead. The obtained results revealed, that melatonin significantly increases BY-2 cells proliferation and protects BY-2 cells against death. Moreover, the conducted analyses showed for the first time that the protective effect of melatonin may be connected not only with its antioxidant properties but also with its direct impact on elevating BI-1 expression and lead-induced programmed cell death (PCD) restriction.

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“…Many secondary metabolites play widely important role from as defensive agents against pathogens to general protection against oxidative stress using as electron donors for free radical scavenging (Grace, 2005). Phenylalanine ammonia lyase (PAL) activity is one of the main enzymes in the synthesis of phenolic compounds, and phenolic contents were increased under PEG-induced drought stress in rice callus culture (Shehab et al, 2010).…”

Section: Non-enzymatic Antioxidantsmentioning

confidence: 99%

Oxidative Stress Studies in Plant Tissue Culture

Şen¹

2012

Antioxidant Enzyme

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Phenolics as Antioxidants

Cited by 108 publications

References 191 publications

Investigation of Antioxidant Activity and Phytochemical Compositions of Celtis Tournefortii

Investigation of Antioxidant Activity and Phytochemical Compositions of Celtis Tournefortii

Melatonin restricts Pb-induced PCD by enhancing BI-1 expression in tobacco suspension cells

Oxidative Stress Studies in Plant Tissue Culture

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