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Biochemistry (Moscow)

, Volume 69, Issue 5, pp 580–584 | Cite as

NADH Oxidation by Mitochondria from the Thermogenic Plant Arum orientale

  • Yu. V. Bertsova
  • V. N. Popov
  • A. V. BogachevEmail author
Article
  • 44 Downloads

Abstract

The enzyme content of the mitochondrial respiratory chain was investigated in the heat-producing plant Arum orientale. It is shown that mitochondria isolated from thermogenic tissues of this plant (with respect to non-thermogenic tissues of A. orientale or to Zea mays) demonstrate significantly elevated levels of activities of two non-coupled NADH dehydrogenases oxidizing intramitochondrial and cytoplasmic NADH pools. It is postulated that operation of a completely non-coupled respiratory chain consisting of non-coupled NADH:quinone oxidoreductases and cyanide-resistant alternative quinoloxidase is the main mechanism of heat production in thermogenic plants.

thermogenic plants Arum orientale NADH dehydrogenase alternative oxidase Complex I 

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Copyright information

© MAIK “Nauka/Interperiodica” 2004

Authors and Affiliations

  • Yu. V. Bertsova
    • 1
  • V. N. Popov
    • 2
  • A. V. Bogachev
    • 1
    Email author
  1. 1.Department of Molecular Energetics of Microorganisms, Belozersky Institute of Physico-Chemical BiologyLomonosov Moscow State UniversityMoscowRussia
  2. 2.Department of Plant Physiology and BiochemistryVoronezh State UniversityVoronezhRussia

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