Effect of phenolic compounds extracted from sunflower seeds on native lipoxygenase activity

Kubicka, Ewa; Jedrychowski, L.; Amarowicz, Ryszard

doi:10.3989/gya.1999.v50.i2.647

Cited by 10 publications

(8 citation statements)

References 13 publications

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“…Oilseeds also contain antioxidants but attracted less attention because they are less often directly consumed, except nuts. However, antioxidant activity and natural antioxidants have been reported in the seeds of canola (Naczk, Amarowicz, Sullivan, & Shahidi, ) and sunflower (Kubicka, Jędrychowski, & Amarowicz, ). Studies on antioxidant activity of halophyte seeds are not well documented.…”

Section: Resultsmentioning

confidence: 99%

Chemical Composition and Antioxidant Activity of Seeds of Various Halophytic Grasses

Toqeer

Qasim

Abideen

et al. 2018

J Americ Oil Chem Soc

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Increasing population has resulted in overexploitation of conventional seeds. The limited supply of water and salinization of agricultural lands are threats to crop production. This creates food insecurity and results in everincreasing prices of crops and edible oils. Halophytes that produce high-quality seeds can serve as sources of oil and edible products. We analyzed the chemical composition and antioxidant activity of seeds from 5 halophytic grasses, i.e., Aeluropus lagopoides, Eragrostis ciliaris, Eragrostis pilosa, Panicum antidotale, and Sporobolus ioclados. These seeds contained crude protein (10-29%), carbohydrates (32-55%), crude fiber (4-21%), minerals (3.8-9.2%), and oil (4-11%), indicating their nutritional potential. Oils of these seeds had suitable fatty-acid composition with 62-82% unsaturation and only 17-24% saturation. Out of this, 91-94% of the total oil constituted by linoleic, oleic, and palmitic acids. High contents of total phenols (2.8-4.2 mg gallic acid equivalent [GAE] g −1 ), flavonoids (0.5-1.3 mg Quercetin equivalent [QE] g −1 ), and tannins (0.3-1.3 mg catechin equivalent [CE] g −1 ) supported their high antioxidant activity (1,1-Diphenyl-2picryl-hydrazyl (DPPH) activity in terms of half maximal inhibitory concentration-IC 50 1.1-5.86 mg mL −1 ; 2,2 0 -azino-bis3-ethylbenzothiazoline-6-sulphonic acid (ABTS) 18.8-72.8 mmol Trolox g −1 ; ferric-reducing antioxidant power 2.0-4.4 mmol Fe +2 g −1 ). The reverse phase-high-pressure liquid chromatography analysis identified the presence of bioactive phenolic antioxidants (mainly gallic acid, chlorogenic acid, coumaric acid, ferulic acid, kaempferol, and quercetin). Due to these characteristic composition and salt tolerability, these plants can serve as potential sources of industrial raw materials for food, edible oil, phytochemicals, and oliochemicals.

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Section: Resultsmentioning

confidence: 99%

Chemical Composition and Antioxidant Activity of Seeds of Various Halophytic Grasses

Toqeer

Qasim

Abideen

et al. 2018

J Americ Oil Chem Soc

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“…2002). Water, methanol and ethanol separately or mixed are commonly used to extract phenolic compounds from plant materials (Kubicka et al. 1999; Zielinski and Kozlowska 2000).…”

Section: Introductionmentioning

confidence: 99%

“…The solvent extraction (methanol, ethanol and acetone) and identification of antioxidant component from hulls, coats and peels have been reported recently (Shahidi et al. 1997; Kubicka et al. 1999).…”

Section: Introductionmentioning

confidence: 99%

Phenolic Content and Antioxidant Activity of Different Extracts From Ocimum Basilicum, Apium Graveolens and Lepidium Sativum Seeds

Aydemir¹,

Becerik

2010

Journal of Food Biochemistry

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The antioxidative properties and total phenolic contents of methanol, ethanol and water extracts from Ocimum basilicum, Apium graveolens and Lepidium sativum seeds were investigated and the results were compared with standards.The methanol extracts of the seeds had significantly higher (P < 0.05) superoxide radical scavenging activity with the concentration for 50% inhibition (IC 50 ) value of 98.73 mg/mL for O. basilicum, 121.57 mg/mL for A. graveolens and 166.16 mg/mL for L. sativum. The results indicated that all the seed extracts showed excellent H 2 O 2 scavenging activities. IC 50 values for H 2 O 2 scavenging activity by methanol extract of O. basilicum, A. graveolens, L. sativum and butylated hydroxyanisole were found to be as 49.9, 52.3, 65.2 and 49.6 mg/mL, respectively. O. basilicum methanol extract had significantly (P < 0.05) higher 1,1-diphenyl-2-picryl-hydrazyl scavenging effect than the other two seeds. The methanol extracts of three seeds were better in Fe +2 chelating activity, reducing power and higher in the content of total phenol as compared with ethanol and water extracts. PRACTICAL APPLICATIONSRecent epidemiological studies have strongly suggested that consumption of certain plant materials such as seeds, leaves, fruits and roots may reduce the risk of chronic diseases related to oxidative stress on account of their antioxidant activity and promote general health benefits. In this study, all seeds extracts exhibited good antioxidant activity (78.3-96.9%) at concentration 1 Corresponding 62 500 mg/mL. Total phenolic content in the seed extracts ranged from 51 to 92 mg GAE/100 g extract. In addition, there was a statistically significant correlation between the amount of phenolic compounds and antioxidant activity (R 2 = 0.9058, P < 0.05) in all the seed extracts. Therefore, O. basilicum, A. greveolens and L. sativum seed extracts have the potential to be developed into dietary supplements and nutraceuticals. 63 PHENOLIC CONTENT AND ANTIOXIDANT ACTIVITY 65 PHENOLIC CONTENT AND ANTIOXIDANT ACTIVITY

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“…Both CGA and CA are known as effective antioxidants 17, 18. Kubicka et al 19 demonstrated that both these acids inhibit the lipoxygenase (EC 1.13.11.12) of sunflower seeds. Furthermore, CA has manifested an effective antioxidant action on sunflower seed oil oxidation at 100 °C and at 25 °C 20…”

Section: Introductionmentioning

confidence: 99%

Oxidative stabilization of cold‐pressed sunflower oil using phenolic compounds of the same seeds

2003

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It is known that sunflower seeds are rich in phenols, constituting approximately 1-3 g per 100 g of seeds. The principal phenol is chlorogenic acid (CGA), followed by caffeic acid (CA) and lower quantities of several other compounds. On the contrary, it is known that phenols are present only in trace amounts in cold-pressed sunflower seed oils. In this study, the possibility of improving the oxidative stability of cold-pressed sunflower oil is evaluated using phenolic substances constitutive of seeds. Phenols, extracted from two different dehulled sunflower seed samples, were identified, measured and added to a cold-pressed sunflower oil and compared with butylated hydroxyanisole (BHA), pure CGA and pure CA. Raw phenolic extract (RPE) was composed of CGA exclusively, whereas CA was present only in traces in its free form was not present. On the contrary, hydrolysable phenol acids (HPAs) were constituted prevalently from CA, released by CGA alkaline hydrolysis. The stabilization effect on oil oxidation at 110 • C was evaluated as 41% and 118% for RPE and HPAs respectively with respect to the control. At 30 • C, no significant differences were recorded between the two seed extracts. Their antioxidant effect was lower than that at 110 • C and evaluated to be, on average 13%. In comparison with BHA, at 30 • C, both seed extracts were more effective than this synthetic phenol; at 110 • C, the antioxidant effect of RPE and BHA was similar, whereas HPA was significantly more effective than BHA. In conclusion, this study demonstrates that the phenols present in sunflower seeds can be considered natural antioxidants suitable for stabilizing the oxidation of cold-pressed sunflower oil, at both low and high temperatures.

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Effect of phenolic compounds extracted from sunflower seeds on native lipoxygenase activity

Cited by 10 publications

References 13 publications

Chemical Composition and Antioxidant Activity of Seeds of Various Halophytic Grasses

Chemical Composition and Antioxidant Activity of Seeds of Various Halophytic Grasses

Phenolic Content and Antioxidant Activity of Different Extracts From Ocimum Basilicum, Apium Graveolens and Lepidium Sativum Seeds

Oxidative stabilization of cold‐pressed sunflower oil using phenolic compounds of the same seeds

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