Redox activity at the surface of oat root cells

Electron transport activity at the cell surface of intact oat seedlings (Avena sativa L. cv Garry) was examined by measuring the oxidation and/or reduction of agents in the medium bathing the roots. Oxidation of NADH with or without added electron acceptors and reduction of ferricyanide by an endoge...

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Bibliographic Details
Published in:Plant physiology (Bethesda) 1984-10, Vol.76 (2), p.386-391
Main Authors: Rubinstein, B, Stern, A.I, Stout, R.G
Format: Article
Language:English
Subjects:
Animal cells
AVENAS
AVOINE
Biological and medical sciences
Cell membranes
Cell physiology
CELLS
CELLULE
CELULAS
Fundamental and applied biological sciences. Psychology
Ions
METABOLISM
METABOLISME
METABOLISMO
OATS
Oxidation
Oxygen
Plant cells
Plant physiology and development
Plant roots
Plants
Plasma membrane and permeation
RACINE
RAICES
ROOTS
Seedlings
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Summary:Electron transport activity at the cell surface of intact oat seedlings (Avena sativa L. cv Garry) was examined by measuring the oxidation and/or reduction of agents in the medium bathing the roots. Oxidation of NADH with or without added electron acceptors and reduction of ferricyanide by an endogenous electron donor were detected. The activities appear to be due to electron transfer at, or across, the plasma membrane and not due to reagent uptake or leakage of oxidants or reductants. NADH-ferricyanide oxidoreductase activity was also detected in plasma membrane-enriched preparations from Avena roots. Based on redox responses to pH, various ions, and to a variety of electron donors and acceptors, the results indicate that more than one electron transport system is present at the plasma membrane.
ISSN:0032-0889
1532-2548
DOI:10.1104/pp.76.2.386