Revista Brasileira de Milho e Sorgo (Dec 2005)

PROTEIN OXIDATION AND LIPID PEROXIDATION OF SEVERAL ‘SARACURA’MAIZE SELECTION CYCLES UNDER CONTINUOUS FLOODING

  • MARCUS JOSÉ CONCEIÇÃO LOPES,
  • ISABEL REGINA PRAZERES DE SOUZA,
  • PAULO CÉSAR MAGALHÃES,
  • ELTO EUGÊNIO GOMES E GAMA,
  • JOSÉ DONIZETI ALVES,
  • MARCELO MURAD MAGALHÃES

Journal volume & issue
Vol. 4, no. 3
pp. 362 – 373

Abstract

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This work aimed at studying, under continuous flooding, biochemicalmechanisms such as total protein concentration, proteic oxidation, and membrane lipidperoxidation in leaf and root of the maize BRS 4154 (Saracura) seedlings, after 1 (C1), 8(C8) and 16 (C16) selection cycles under intermittent flooding. The variety BR 107 wasused as control. Seeds of the selection cycles from Saracura: C1, C8 and C16, and controlBR 107 were sowed with the embryo facing up, 1 cm deep, in perforated 200 ml plasticcups filled with lowland soil. The treatments were composed of the periods 0 h (withoutflooding) 8, 24, 48, 72, 96, 120 and 144 h under continuous flooding, using distilledwater up to the soil surface. Protein oxidation and concentration, root and leaf lipid peroxidation were responsive to flooding, showing the same tendency in all genotypesanalyzed.

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