Nitric oxide and iron in plants: an emerging and converging story

Although iron is plentiful, it exists primarily in its insoluble form and is therefore not freely available to plants. Thus, complex strategies involving chelators, production of reductive agents, reductase activities, proton-mediated processes, specialized storage proteins, and others, act in conce...

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Bibliographic Details
Published in:Trends in plant science 2005, Vol.10 (1), p.4-8
Main Authors: Graziano, Magdalena, Lamattina, Lorenzo
Format: Article
Language:English
Subjects:
Biological and medical sciences
Biological Transport, Active
Fundamental and applied biological sciences. Psychology
Homeostasis
Iron - metabolism
Iron - physiology
Nitric Oxide - physiology
Plant physiology and development
Plants - metabolism
Water and solutes. Absorption, translocation and permeability
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Summary:Although iron is plentiful, it exists primarily in its insoluble form and is therefore not freely available to plants. Thus, complex strategies involving chelators, production of reductive agents, reductase activities, proton-mediated processes, specialized storage proteins, and others, act in concert to mobilize iron from the environment into the plant and within the plant. Because of its fundamental role in plant productivity and ultimately in human nutrition, several unsolved and central questions concerning sensing, trafficking, homeostasis and delivery of iron in plants are currently a matter of intense debate. Here, we discuss some recent studies focusing on iron nutrition in plants as well as evidence from iron homeostasis in animals and propose a new scenario involving the formation of nitric oxide and iron–nitrosyl complexes as part of the dynamic network that governs plant iron homeostasis.
ISSN:1360-1385
1878-4372
DOI:10.1016/j.tplants.2004.12.004