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Iron reductase systems on the plant plasma membrane—A review

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Abstract

Higher plant roots, leaf mesophyll tissue, protoplasts as well as green algae are able to reduce extra-cellular ferricyanide and ferric chelates. In roots of dicotyledonous and nongraminaceous, monocotyledonous plants, the rate of ferric reduction is increased by iron deficiency. This reduction is an obligatory prerequisite for iron uptake and is mediated by redox systems localized on the plasma membrane. Plasma membrane-bound iron reductase systems catalyze the transmembrane electron transport from cytosolic reduced pyridine nucleotides to extracellular iron compounds. Natural and synthetic ferric complexes can act as electron acceptors.

This paper gives an overview about the present knowledge on iron reductase systems at the plant plasma membrane with special emphasis on biochemical characteristics and localisation.

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Abbreviations

FeCh:

ferric chelate(s)

FeCh-R:

ferric chelate reductase

FeCit:

FeIII-Citrate

FeCN:

ferricyanide

FeCN-R:

ferricyanide reductase

FeEDTA:

FeIII-EDTA

LPC:

lysophosphatiolylcholine

NR:

nitrate reductase

PM:

plasma membrane

TX 100:

Triton × 100

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  1. Wolfgang Brüggemann

    Present address: Institute of Ecological Plant Physiology, Heinrich-Heine-University, Universitätsstr. 1, D-40225, Düsseldorf, Germany

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  1. Department of Plant Biology, University of Groningen, Biologisch Centrum, Kerklaan 30, P.O.Box 14, NL-9750 AA, Haren, The Netherlands

    Petra R. Moog & Wolfgang Brüggemann

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Moog, P.R., Brüggemann, W. Iron reductase systems on the plant plasma membrane—A review. Plant Soil 165, 241–260 (1994). https://doi.org/10.1007/BF00008068

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