African Journal of
Agricultural Research

  • Abbreviation: Afr. J. Agric. Res.
  • Language: English
  • ISSN: 1991-637X
  • DOI: 10.5897/AJAR
  • Start Year: 2006
  • Published Articles: 6578

Full Length Research Paper

Nitrogen compounds, proteins and amino acids in corn subjected to doses of aluminum

Luma Castro de Souza
  • Luma Castro de Souza
  • Sao Paulo State University, Brazil.
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Deise Cristina Santos Nogueira
  • Deise Cristina Santos Nogueira
  • Sao Paulo State University, Brazil.
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Liliane Correa Machado
  • Liliane Correa Machado
  • Federal Rural University of the Amazon, Brazil.
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Thays Correa Costa
  • Thays Correa Costa
  • Federal Rural University of the Amazon, Brazil.
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Jessica Taynara da Silva Martins
  • Jessica Taynara da Silva Martins
  • Federal Rural University of the Amazon, Brazil.
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Cleverson Alan Pantoja Mendes
  • Cleverson Alan Pantoja Mendes
  • Federal Rural University of the Amazon, Brazil.
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Najla Maria Castro Pires
  • Najla Maria Castro Pires
  • Federal Rural University of the Amazon, Brazil.
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Susana Silva Conceicao
  • Susana Silva Conceicao
  • Federal Rural University of the Amazon, Brazil
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Ana Ecidia de Araujo Brito
  • Ana Ecidia de Araujo Brito
  • Federal Rural University of the Amazon, Brazil
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Candido Ferreira de Oliveira Neto
  • Candido Ferreira de Oliveira Neto
  • Federal Rural University of the Amazon, Brazil.
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  •  Received: 22 December 2015
  •  Accepted: 17 March 2016
  •  Published: 28 April 2016

Abstract

Corn (Zea mays L.) is highly adaptable, but it has difficulties in expressing its productive potential in soils with high aluminum content, since this element is directly related to high acidity in the soil. The objective of this study was to evaluate the nitrogen compounds, proteins and amino acids of two corn cultivars subjected to increasing doses of aluminum. The experiment was carried out in a greenhouse using one of the corn plants from varieties BRS 106 and BRS 4157. The experimental design was entirely randomized, in a factorial design of 5x2, and the factors were composed of five doses of Al3+ (0; 50; 100; 150 and 200 mmol L-1), with five repetitions. The variables analyzed were the concentration of nitrate, the activity of the nitrate reductase, concentration of ammonium, amino acids and proteins. There was a decrease in nitrate, activity of the Reductase enzyme of the Nitrate and protein in the highest dose of aluminum (200 mmol L-1) for both cultivars. There was an increase in ammonium and amino acids in the leaves of cultivars BRS 106 and BRS 4157. Cultivars BRS 106 and BRS 4157 were affected by the increasing doses of aluminum, but cultivar BRS 106 showed to be more tolerant.

Key words: Aluminum, toxicity, corn, metabolism.