Antioxidant activity and phenolic content of extracts from different Pterospartum tridentatum populations growing in Portugal

Coelho, M.T.; Gonçalves, José Carlos; Alves, Vítor D.; Martins, Margarida Moldão

doi:10.1016/j.profoo.2011.09.215

Cited by 13 publications

(18 citation statements)

References 11 publications

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“…Several studies analyzed the effect of different factors in P. tridentatum extract production, namely, the extraction time, solvent polarity, and plant endogenous characteristics (edaphoclimatic conditions, harvest period, and plant section), reporting extraction yields ranging from 11.3% to 46% (Coelho et al., 2011; Luís et al., 2009; Martínez et al., 2012).…”

Section: Resultsmentioning

confidence: 99%

“…Contrarily, methanolic extract showed lower activity,with EC 50 of 150 mg/L (Aires,Marrinhas, Carvalho, Dias, & Saavedra, 2016). Beside solvent, other factors, such as the plant section (flowers, stems, or leaves) and the harvest period, may influence the antioxidant activity of P. tridentatum extract, as demonstrated by Coelho et al (2011).…”

Section: Characterization Of P Tridentatum Extractmentioning

confidence: 96%

“…Regarding the total phenolic content, the P. tridentatum extract analyzed had 200 ± 8 mg GAE/g, which is in agreement with the value (196.61 ± 3.94 mg GAE/g) reported by Luís et al (2009) for ethanolic extract. In general, higher values were attained with aqueous extracts, ranging from 160 to 400 mg GAE/g (Coelho et al, 2011(Coelho et al, , 2012Ferreira et al, 2012;Luís et al, 2009), as well as with ethanolic-aqueous (1:1) extracts that comprised values between 140 and 292 mg GAE /g (Ferreira et al, 2012;Martínez et al, 2012).…”

Section: Characterization Of P Tridentatum Extractmentioning

confidence: 99%

“…This native plant from the Portuguese forests has been used in popular medicine and as flavouring in traditional cooking (Luís, Domingues, Gil, & Duarte, 2009). Several studies reported high contents of phenolic compounds in P. tridentatum extracts (Coelho, Gonçalves, Alves, & Moldão‐Martins, 2011; Coelho, Pimenta, Gonçalves, Alves, & Moldão‐Martins, 2012; Ferreira et al., 2012; Martínez, Estévez, & Silva‐Pando, 2012), mainly comprising dihydroflavonol (as dihydroquercetin 6‐C‐hexosides), flavonol (myricetin 6‐C‐glucoside; quercetin O‐deoxyhexosyl‐hexoside and quercetin O‐hexoside), and isoflavone (genistein) derivatives (Paulo et al., 2008; Roriz, Barros, Carvalho, Santos‐Buelga, & Ferreira, 2014). Relevant biological properties, namely, antifungal, antibacterial (Gomes et al., 2018; Martins et al., 2015), antihyperglycaemic (Paulo et al., 2008), and antioxidant (Roriz, Barros, Carvalho, Santos‐Buelga, & Ferreira, 2015) activities were also reported.…”

Section: Introductionmentioning

confidence: 99%

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Enhancing oxidative stability of sunflower oil by supplementation with prickled broom (Pterospartum tridentatum) ethanolic extract

Neves

Miranda

Lemos

et al. 2020

Journal of Food Science

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This study aimed to evaluate the effect of ethanolic extract of Pterospartum tridentatum flowers in the stability of sunflower oil. The extract was characterized regarding to its antioxidant activity by the 2,2,1‐diphenyl‐1‐picrylhydrazyl (DPPH) scavenging method (EC50 = 76.3 ± 2.6 µg/mL) and total phenolic content (200 ± 8 mg GAE/g). Extracts were added at 500 mg/L (E1) and 1,000 mg/L (E2), and after 30 days of storage at room temperature, E2 oil showed improved quality parameters, with a reduction of 22.4%, 17.2%, and 45.6% in the values of acidity, peroxide, and p‐anisidine, respectively. The extract also increased oil stability at 180 °C. After 27 hr, the acidity (0.216 ± 0.016 mg KOH/g) and the total oxidation value (TOTOX) (69.30 ± 0.26) values of E2 oil were significantly lower than the control. These results showed that P. tridentatum effectively improved the shelf‐life and thermal stability of sunflower oil, being a promising source of antioxidants for edible oils processing. Practical Application Pterospartum tridentatum ethanolic extracts increased stability of sunflower oil during storage at room temperature and at 180 °C. Oil stability increased with extract concentration, being highest for 1,000 mg/L. Therefore, P. tridentatum may be a promising source of antioxidants for edible oils processing.

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Section: Resultsmentioning

confidence: 99%

Section: Characterization Of P Tridentatum Extractmentioning

confidence: 96%

Section: Characterization Of P Tridentatum Extractmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Enhancing oxidative stability of sunflower oil by supplementation with prickled broom (Pterospartum tridentatum) ethanolic extract

Neves

Miranda

Lemos

et al. 2020

Journal of Food Science

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“…The method of electrostatic droplet generation was used for production of alginate and alginate‐inulin microbeads and the process scheme is given in Figure . The aqueous extract of carqueja was obtained by boiling a mixture of plant samples and distilled water in a Clevenger apparatus, followed by lyophilization of the aqueous phase as described by Coelho and others (). The appropriate amount of the extract (2 mg/mL) was added to Na–alginate water solution (1.5% w/v) to prepare extract–alginate solution (Manojlovic and others ; Stojanovic and others ).…”

Section: Methodsmentioning

confidence: 99%

Calcium–Alginate–Inulin Microbeads as Carriers for Aqueous Carqueja Extract

Balanč

Kalušević

Drvenica

et al. 2015

Journal of Food Science

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Carqueja (Pterospartum tridentatum) is an endemic species and various bioactive compounds have been identified in its aqueous extract. The aim of this study was to protect the natural antioxidants from the aqueous extract of carqueja by encapsulation in Ca-alginate microbeads and Ca-alginate microbeads containing 10% and 20% (w/v) of inulin. The microbeads produced by electrostatic extrusion technique had an average diameter from 625 μm to 830 μm depending on the portion of inulin. The sphericity factor of the hydrogel microbeads had values between 0.014 and 0.026, while freeze dried microbeads had irregular shape, especially those with no excipient. The reduction in microbeads size after freeze drying process (expressed as shrinkage factor) ranged from 0.338 (alginate microbeads with 20% (w/v) of inulin) to 0.523 (plain alginate microbeads). The expressed radical scavenging activity against ABTS and DPPH radicals was found to be between 30% and 40% for encapsulated extract, while the fresh extract showed around 47% and 57% of radical scavenging activity for ABTS and DPPH radicals, respectively. The correlation between antioxidant activity and the total phenolic content were found to be positive (in both assay methods, DPPH and ABTS), which indicate that the addition of inulin didn't have influence on antioxidant activity. The presence of inulin reduced stiffness of the hydrogel, and protected bead structure from collapse upon freeze-drying. Alginate-inulin beads are envisaged to be used for delivery of aqueous P. tridentatum extract in functional food products.

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Pterospartum tridentatum, Gomphrena globosa and Cymbopogon citratus: A phytochemical study focused on antioxidant compounds

Roriz

Barros

Carvalho

et al. 2014

Food Research International

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Pterospartum tridentatum (L.) Willk., Gomphrena globosa L. and Cymbopogon citratus (DC) Stapf. are examples of medicinal plants that demand a more detailed characterization. Therefore, phenolic composition (e.g., phenolic acids and flavonoids) was analysed by chromatographic and mass spectrometry techniques and the antioxidant activity was also accessed through free radicals scavenging activity, reducing power and inhibition of lipid peroxidation in brain homogenates.C. citratus revealed the highest β-carotene bleaching and lipid peroxidation inhibitions, being luteolin 2´´-O-rhamnosyl-6-C-glucoside the main compound. P. tridentatum presented the highest 2,2-diphenyl-1-picrylhydrazyl (DPPH) radical scavenging activity and reducing power and mainly dihydroflavonol and isoflavone derivatives were detected. Otherwise, G. globosa presented kaempferol 3-O-rutinoside as the most abundant phenolic compound and betacyanins were only present in this sample. It is very interesting to study the phytochemical composition of these plants, given the importance of their consumption.

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Antioxidant activity and phenolic content of extracts from different Pterospartum tridentatum populations growing in Portugal

Cited by 13 publications

References 11 publications

Enhancing oxidative stability of sunflower oil by supplementation with prickled broom (Pterospartum tridentatum) ethanolic extract

Enhancing oxidative stability of sunflower oil by supplementation with prickled broom (Pterospartum tridentatum) ethanolic extract

Calcium–Alginate–Inulin Microbeads as Carriers for Aqueous Carqueja Extract

Pterospartum tridentatum, Gomphrena globosa and Cymbopogon citratus: A phytochemical study focused on antioxidant compounds

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