Iron dynamics in plants

Briat, Jean-Francois (2007) Iron dynamics in plants. Advances in Botanical Research, 46. 137-180 .

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Abstract

Iron dynamics in plants start by complex interactions between plants and the rhizospheric microflora, which determine the amount of available iron for uptake by root transporters. Under iron-deficient conditions, two types of high affinity transport systems are activated, depending on the plant family considered. In nongrass plants, Fe(III)-chelate reduction is followed by Fe(II) uptake, whereas in grasses, Fe(III) chelated to secreted phytosiderophores (PSs) is taken up by roots. Long distance allocation of iron between organs and tissues, as well as its subcellular compartmentation and remobilization, also involve various chelation and reduction activities, associated to transporters and to soluble proteins storing and buffering this metal. This iron trafficking at the whole plant, cellular, and subcellular levels, is a highly regulated process starting to be characterized at a molecular level. To maintain iron homeostasis is an important determinant to build up prosthetic groups such as heme and Fe–S clusters, and to assemble them into apoproteins. Such processes require complex protein machineries which are located in mitochondria and plastids. An essential and plant-specific role of these iron dynamics is evidenced by the strong iron requirement for the photosynthetic reaction to take place.

Item Type:	Article
Author Affiliation:	Biochimie et Physiologie Moléculaire des Plantes, Centre National de la Recherche Scientifique (UMR 5004), Institut National de la Recherche Agronomique, Université Montpellier
Subjects:	Plant Physiology and Biochemistry > Biochemistry
Divisions:	Other Crops
Depositing User:	Sandhya Gir
Date Deposited:	16 Mar 2011 18:12
Last Modified:	16 Mar 2011 18:12
Official URL:	http://dx.doi.org/10.1016/S0065-2296(07)46004-9
URI:	http://eprints.icrisat.ac.in/id/eprint/1642

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