The coexistence of the oxidative and reductive systems in roots: the role of plasma membranes.
Different components of the plasma membrane bound and associated redox system, which participate in the energy transfer from the predominantly reducing intercellular environment to the extracellular oxidizing environment, are reviewed. Special attention is given to plant root cells. An analysis of the plasma membrane-associated redox components, such as the cytochromes, quinones, and different types of oxidoreductases (dehydrogenases, oxidases, peroxidases, and superoxide dismutases), is made, as well as their coupling with naturally occurring extracellular substrates, such as oxygen and its reactive forms, phenols, ascorbate, nitrate, ferric ion, and organic acids. The participation of different free radical species in most of the plasma membrane-bound redox reactions is documented.
Vuletić
Mirjana
M
Maize Research Institute Zemun Polje, Belgrade, Serbia and Montenegro. mvuletic@mrizp.co.yu
Sukalović
Vesna Hadzi-Tasković
VH
Vucinić
Zeljko
Z
D002462:Cell Membrane / Q000378:metabolism*; D002473:Cell Wall / Q000378:metabolism; D003580:Cytochromes / Q000378:metabolism; D005609:Free Radicals / Q000378:metabolism*; D010084:Oxidation-Reduction; D010088:Oxidoreductases / Q000378:metabolism; D018521:Plant Physiological Phenomena; D018517:Plant Roots / Q000737:chemistry / Q000378:metabolism*; D011809:Quinones / Q000378:metabolism; D017382:Reactive Oxygen Species / Q000378:metabolism
D003580:Cytochromes; D005609:Free Radicals; D011809:Quinones; D017382:Reactive Oxygen Species; D010088:Oxidoreductases