African Journal of
Agricultural Research

  • Abbreviation: Afr. J. Agric. Res.
  • Language: English
  • ISSN: 1991-637X
  • DOI: 10.5897/AJAR
  • Start Year: 2006
  • Published Articles: 6574

Full Length Research Paper

Fertilizer source influence on antioxidant activity of lettuce

Camila Karina Costa e Silva
  • Camila Karina Costa e Silva
  • Programa de Pós-Graduação em Agricultura e Ambiente, Universidade Federal de Alagoas – Campus Arapiraca, Brazil.
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Kelly Barbosa da Silva
  • Kelly Barbosa da Silva
  • Rede Nordeste de Biotecnologia/RENORBIO – Instituto de Química e Biotecnologia, Universidade Federal de Alagoas, Brazil.
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Paulo Rogerio Barbosa de Miranda
  • Paulo Rogerio Barbosa de Miranda
  • Departamento de Mestrado Profissional em Análise de Sistemas Ambientais, Centro Universitário Cesmac, Brazil.
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Tamara Claudia de Araujo Gomes
  • Tamara Claudia de Araujo Gomes
  • Empresa Brasileira de Pesquisa Agropecuária, Centro de Pesquisa Agropecuária dos Tabuleiros Costeiros, Embrapa Tabuleiros Costeiros. Campus Delza Gitai, Brazil.
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Jesse Marques da Silva Junior
  • Jesse Marques da Silva Junior
  • Departamento de Mestrado Profissional em Análise de Sistemas Ambientais, Centro Universitário Cesmac, Brazil.
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Mayara Andrade Souza
  • Mayara Andrade Souza
  • Departamento de Mestrado Profissional em Análise de Sistemas Ambientais, Centro Universitário Cesmac, Brazil.
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Aldenir Feitosa dos Santos
  • Aldenir Feitosa dos Santos
  • Departamento de Mestrado Profissional em Análise de Sistemas Ambientais, Centro Universitário Cesmac, Brazil.
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Joao Gomes da Costa
  • Joao Gomes da Costa
  • Departamento de Mestrado Profissional em Análise de Sistemas Ambientais, Centro Universitário Cesmac, Brazil.
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  •  Received: 06 February 2018
  •  Accepted: 16 October 2018
  •  Published: 13 December 2018

Abstract

Consumers are increasingly aware and concerned about their health and therefore demanding for more healthy and nutritious food. Thus, the demand for organic foods has increased recently. Thus the aim of this study was to compare the antioxidant activity and total phenolic content of lettuce produced in organic and conventional systems. The antioxidant activity of ethanol extracts was determined by the DPPH and FRAP assay. The total phenolics content was obtained spectrophotometrically according to the Folin-Ciocalteu method and calculated as gallic acid equivalent. The organic lettuce showed higher effectiveness in antioxidant capacity and higher levels of phenolic compounds than lettuce produced in the conventional system.

Key words: Lactuca sativa, antioxidant potential, agricultural management, dpph frap, phenolics total.