Antioxidant Activity of Brazilian Vegetables and Its Relation with Phenolic Composition

Tiveron, Ana Paula; Melo, Priscilla Siqueira; Bergamaschi, Keityane Boone; Vieira, Thaís Maria Ferreira de Souza; Regitano-D’Arce, Marisa Aparecida Bismara; Alencar, Severino M. de

doi:10.3390/ijms13078943

Cited by 133 publications

(114 citation statements)

References 34 publications

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“…As examples, the 2,2'-azinobis(3-ethylbenzothiazoline-6-sulfonic acid) radical cation (ABTS •+ ) and diphenylpicrylhydrazyl (DPPH) free radical scavenging methods and the ferric reducing antioxidant power (FRAP) assay are spectrophotometric procedures based on electrons transfer reactions that indirectly measure the antioxidant capacity several types of samples. 12,13 In this context, it is possible to perceive the great importance of antioxidant substances and the possible relationships between the antioxidant activities and phenolic compounds. There is also high biodiversity in Brazil, for example in the Tocantins' savanna, which contains many plants that are used in popular medicine, but few studies of their therapeutic potential have been carried out.…”

Section: Introductionmentioning

confidence: 99%

Antioxidant Potential and its Correlation with the Contents of Phenolic Compounds and Flavonoids of Methanolic Extracts from Different Medicinal Plants

Teixeira¹,

vale²,

Almeida³

et al. 2017

Rev. Virtual Quim.

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Resumo: Neste estudo, os extratos metanólicos de dez espécies de plantas medicinais coletadas em Gurupi, Tocantins, Brasil, foram submetidos aos ensaios de neutralização dos radicais ABTS e DPPH, redução do ferro (FRAP) e poder redutor, para investigação do potencial antioxidante. Os resultados revelaram que as plantas avaliadas apresentam pronunciadas atividades antioxidantes, sendo as espécies Buchenavia tetraphylla, Buchenavia tomentosa e Lippia sidoides as que apresentaram as maiores atividades, bem como os maiores teores de compostos fenólicos e de flavonoides. Por meio da determinação dos coeficientes de Person, foi possível observar correlação entre os teores de compostos fenólicos e as atividades antioxidantes perante todos os ensaios. Por outro lado, não foram observadas correlações satisfatórias entre os teores de flavonoides e tais atividades, sugerindo que os compostos fenólicos são os principais contribuintes para o potencial antioxidante apresentado pelos extratos das plantas medicinais estudadas. Palavras-chave: Buchenavia; Lippia sidoides; Ensaios antioxidantes. AbstractIn this study, methanolic extracts of ten species of medicinal plants collected at Gurupi, Tocantins state, Brazil, were subjected to assays of neutralization of ABTS and DPPH radicals, ferric reducing antioxidant power (FRAP), and reducing power to investigate their antioxidant potential. The results revealed that the plants that were investigated exhibited strong antioxidant activities. The species Buchenavia tetraphylla, Buchenavia tomentosa, and Lippia sidoides displayed the highest activities, as well as the largest contents of phenolic compounds and flavonoids. Using Pearson's correlation coefficient, we could observe correlations between the contents of phenolic compounds and the antioxidant activities in all the assays. On the other hand, we could not observe satisfactory correlations between the flavonoid contents and these activities, which suggest that the phenolic compounds provide the main contributions to the antioxidant potential displayed by the medicinal plant extracts that were studied.

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Section: Introductionmentioning

confidence: 99%

Antioxidant Potential and its Correlation with the Contents of Phenolic Compounds and Flavonoids of Methanolic Extracts from Different Medicinal Plants

Teixeira¹,

vale²,

Almeida³

et al. 2017

Rev. Virtual Quim.

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“…Phenolic compounds are secondary metabolites found in plants and plant derived foods such as fruits, teas and red wine (Haminiuk et al, 2012). They are used by the plants against phytopathogens, radiation and are involved in antioxidant events (Tiveron et al, 2012). Phenolic compounds are associated with stress response in plants and have recognized antimicrobial properties (Martins et al, 2015).…”

Section: Introductionmentioning

confidence: 99%

Anti-quorum sensing activity of phenolic extract from Eugenia brasiliensis (Brazilian cherry)

et al. 2016

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The aim of this study was to assess the anti-quorum sensing activity of phenolic extracts from grumixama (Eugenia brasiliensis), also known as Brazilian cherry, in concentrations that did not interfere with bacterial growth. The pulp phenolic compounds were extracted by using solid phage extraction in a mini-collumn C18 and quantified by spectrophotometry. The anti-quorum sensing activity was evaluated by testing the inhibition of violacein production in Chromobacterium violaceum and by evaluating the swarming motility in Aeromonas hydrophila and Serratia marcescens, both phenotypes regulated by quorum sensing. The phenolic extract strongly inhibited the production of violacein in C. violaceum, reducing its production in comparison with a control with no extract. No inhibition of growth was observed at the concentrations tested for quorum sensing inhibition. Confirming the quorum sensing inhibition phenotype, the extract was also able to inhibit swarming motility in S. marcescens and in A. hydrophila, although in the later the effect was marginal. Dverall, these results indicate that phenolic extract from E. brasiliensis presents quorum sensing inhibitory activity most likely due to the presence of fruit phenolics which have been implicated as quorum sensing inhibitors in Gram negative bacteria.Keywords: quorum sensing; anti-quorum sensing; phenolic extract; Brazilian cherry; Eugenia brasiliensis. Practical Application:The phenolic extract in this study presents potential applications in the food and pharmaceutical industries due to inhibition of phenotypes regulated by quorum sensing, which include production of virulence factors and spoilage enzymes. By inhibiting phenotypes associated with quorum sensing, the extract presents potential application as a natural preservative for food conservation and as an alternative or an adjuvant with antibiotics.

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“…Et Wils showed greater a trolox content (µmol/g) than those found in the present study. Likewise, trolox concentrations in coffee pulp were greater than those found by Tiveron et al (2012) in 23 different plants grown in Brazil.…”

Section: Discussionmentioning

confidence: 58%

Changes in composition, antioxidant content, and antioxidant capacity of coffee pulp during the ensiling process

et al. 2014

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-The objective of the present study was to determine the nutritive value, the presence of antioxidant compounds, and the antioxidant capacity of coffee pulp ensiled or non-ensiled. Dry matter (DM), crude protein (CP), ash, acid detergent fiber (ADF), neutral detergent fiber (NDF), and lignin, as well as the antioxidant compounds present in coffee pulp and their antioxidant capacity, were determined. A completely randomized design was used. Data were analyzed by analysis of variance. Ensiling of coffee pulp increased the CP content from 98.6 to 111.6 g kg −1 DM, NDF from 414.6 to 519.5 g kg −1 DM, ADF from 383.9 to 439.3 g kg −1 DM, and lignin from 122.9 to 133.6 g kg −1 DM. Caffeine decreased from 5.72 to 5.02 mg g −1 DM. Three antioxidant compounds were detected. Caffeic acid decreased due to ensiling (16.49 vs 14.69 mg g −1 DM). Gallic acid (2.88 vs 2.58 mg g −1 DM) and chlorogenic acid (62.12 vs 56.00 mg g −1 DM) did not differ, and there was similar antioxidant capacity of non-ensiled (215.66 µmol trolox g −1 DM) and ensiled coffee pulp (206.59 µmol trolox g −1 DM). Despite the decrease in the caffeic acid content due to the ensiling process, it is possible to use either ensiled or non-ensiled coffee pulp for animal feeding because of its high antioxidant capacity.

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Antioxidant Activity of Brazilian Vegetables and Its Relation with Phenolic Composition

Cited by 133 publications

References 34 publications

Antioxidant Potential and its Correlation with the Contents of Phenolic Compounds and Flavonoids of Methanolic Extracts from Different Medicinal Plants

Antioxidant Potential and its Correlation with the Contents of Phenolic Compounds and Flavonoids of Methanolic Extracts from Different Medicinal Plants

Anti-quorum sensing activity of phenolic extract from Eugenia brasiliensis (Brazilian cherry)

Changes in composition, antioxidant content, and antioxidant capacity of coffee pulp during the ensiling process

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