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Antioxidant potential of tomatoes cultivated in organic and conventional systems.

Borguini, Renata Galhardo ; Bastos, Deborah Helena Markowicz ; Moita-Neto, José Machado ; Capasso, Fernanda Sobral and Torres, Elizabeth Aparecida Ferraz da Silva (2013) Antioxidant potential of tomatoes cultivated in organic and conventional systems. [Potencial antioxidante dos tomates cultivados em sistema orgânico e convencional.] Brazilian Archives of Biology and Technology, 56 (4), pp. 521-529.

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Document available online at: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132013000400001&lng=pt&nrm=iso&tlng=en


The objective of the study was to compare the effect of organic and conventional cultivation on the antioxidant compound content and antioxidant activity of the Carmen tomato cultivar. Tomatoes were analyzed regarding ascorbic acid, phenolic compounds, lycopene content and antioxidant activity. Organic tomatoes presented higher content of ascorbic acid and total phenolics (641.39 and 4466.66 mg/100 g EAG on dry wt basis) than did the conventional tomatoes (510.16 and 3477.50 mg/100 g EAG on wt dry basis, respectively). There was no difference in lycopene concentrations between the organic and conventional. The ether, alcohol and aqueous extracts obtained from the tomatoes were subjected to the DPPH test and the β-carotene/linoleic acid system assay. The alcohol and aqueous extracts from organic tomatoes presented higher antioxidant activity in the DPPH test (25.43 and 14.28%, respectively) than the conventional tomatoes (19.52 and 11.33%, respectively). Organic tomatoes had higher antioxidant potential probably due to its higher ascorbic acid and total phenolic values.

Summary translation

O objetivo do estudo foi comparar o efeito do cultivo orgânico e convencional sobre o conteúdo composto antioxidante e atividade antioxidante do cultivar tomate Carmen. Tomates foram analisados ​​quanto ácido ascórbico, compostos fenólicos, teor de licopeno e atividade antioxidante. Tomates orgânicos apresentaram maior conteúdo de ácido ascórbico e compostos fenólicos (641,39 e 4466,66 mg / 100 g EAG em base de peso seco) do que os tomates convencionais (510,16 e 3477,50 mg / 100 g em base seca EAG em peso, respectivamente). Não havia nenhuma diferença nas concentrações de licopeno entre o orgânico e convencional. O éter, álcool e extractos aquosos obtidos a partir dos tomates foram submetidas ao ensaio de DPPH e do sistema de ensaio de ácido β-caroteno / linoleico. O álcool e extratos aquosos de tomates orgânicos apresentaram maior atividade antioxidante no ensaio DPPH (25,43 e 14,28%, respectivamente) do que os tomates convencionais (19,52 e 11,33%, respectivamente). Tomates orgânicos apresentaram maior potencial antioxidante, provavelmente, devido à sua maior ácido ascórbico e valores fenólicos totais.

EPrint Type:Journal paper
Keywords:Antioxidant activity, Ascorbic acid, Lycopene, Phenolic compounds. Atividade antioxidante, Ácido ascórbico, Licopeno, Compostos fenólicos.
Agrovoc keywords:
Ascorbic acid
Phenolic compounds
Subjects: Crop husbandry > Production systems
Crop husbandry
Crop husbandry > Production systems > Fruit and berries
Crop husbandry > Crop health, quality, protection
Research affiliation: Brazil > Embrapa - Brazilian Agricultural Research Corporation
Brazil > Other organizations
Related Links:http://www.scielo.br/?lng=pt
Deposited By: Sartor, Luana Alessandra
ID Code:29097
Deposited On:10 Sep 2015 18:08
Last Modified:10 Sep 2015 18:08
Document Language:English
Refereed:Peer-reviewed and accepted

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