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Iron Transport and Signaling in Plants

  • S. ThomineEmail author
  • V. Lanquar
Chapter
Part of the Signaling and Communication in Plants book series (SIGCOMM, volume 7)

Abstract

Iron is an essential micronutrient for most living organisms. Paradoxically, although iron is abundant in many soils, iron availability is very often limiting for plant growth. In addition, iron is potentially highly toxic to cells. Therefore, iron homeostasis needs to be tightly regulated. This chapter focuses on the iron transport pathways dedicated to iron uptake, distribution and sequestration in plants, and the processes that regulate their activities. Nongraminaceous and graminaceous plant species acquire iron from the soil through two distinct strategies based on iron reduction and iron chelation, respectively. We describe the molecular mechanisms underlying these strategies and the factors responsible for their up-regulation under iron deficiency. The acquisition of iron by plants is regulated at several levels by local and systemic signals. The systemic signaling pathway appears to integrate multiple inputs from hormonal signals, diurnal regulation, and the plant nutritional demand.

Keywords

Nitric Oxide bHLH Transcription Factor Mugineic Acid Diurnal Regulation Chlorotic Phenotype 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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© Springer-Verlag Berlin Heidelberg 2011

Authors and Affiliations

  1. 1.Institut des Sciences du Végétal CNRSGif-sur-Yvette cedexFrance
  2. 2.Department of Plant BiologyCarnegie InstitutionStanfordUSA

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