A quick journey into the diversity of iron uptake strategies in photosynthetic organisms
2021
Martín-Barranco, Amanda | Thomine, Sébastien | Vert, Grégory | Zelazny, Enric | Institut de Biologie Intégrative de la Cellule (I2BC) ; Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS) | LRSV-Signalisation Cellulaire et Ubiquitination (LRSV-SCU) ; Laboratoire de Recherche en Sciences Végétales (LRSV) ; Université Toulouse III - Paul Sabatier (UT3) ; Université de Toulouse (UT)-Université de Toulouse (UT)-Centre National de la Recherche Scientifique (CNRS)-Institut National Polytechnique (Toulouse) (Toulouse INP) ; Université de Toulouse (UT)-Université Toulouse III - Paul Sabatier (UT3) ; Université de Toulouse (UT)-Université de Toulouse (UT)-Centre National de la Recherche Scientifique (CNRS)-Institut National Polytechnique (Toulouse) (Toulouse INP) ; Université de Toulouse (UT) | Biochimie et Physiologie Moléculaire des Plantes (BPMP) ; Université de Montpellier (UM)-Centre National de la Recherche Scientifique (CNRS)-Institut national d’études supérieures agronomiques de Montpellier (Montpellier SupAgro)-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE) | h2020 marie sklodowska-curie actions PCIG-GA-2012-334021 | ANR-17-CE20-0008,MOBIFER,Dynamique de la sécrétion de coumarines dans le sol, un processus développé par les plantes pour améliorer la nutrition en fer(2017) | ANR-10-LABX-0041,TULIP,Towards a Unified theory of biotic Interactions: the roLe of environmental(2010) | ANR-11-IDEX-0002,UNITI,Université Fédérale de Toulouse(2011) | ANR-18-CE20-0008,NUTRIR,Protéines HIR des microdomaines membranaires : contrôle de la machinerie d'acquisition du fer et nouvelles fonctions chez Arabidopsis(2018)
Early Access
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Mostrar más [+] Menos [-]Inglés. Iron (Fe) is involved in multiple processes that contribute to the maintenance of the cellular homeostasis of all living beings. In photosynthetic organisms, Fe is notably required for photosynthesis. Although iron is generally abundant in the environment, it is frequently poorly bioavailable. This review focuses on the molecular strategies that photosynthetic organisms have evolved to optimize iron acquisition, using Arabidopsis thaliana, rice (Oryza sativa), and some unicellular algae as models. Non-graminaceous plants, including Arabidopsis, take up iron from the soil by an acidification-reduction-transport process (strategy I) requiring specific proteins that were recently shown to associate in a dedicated complex. On the other hand, graminaceous plants, such as rice, use the so-called strategy II to acquire iron, which relies on the uptake of Fe3+ chelated by phytosiderophores that are secreted by the plant into the rhizosphere. However, apart these main strategies, accessory mechanisms contribute to robust iron uptake in both Arabidopsis and rice. Unicellular algae combine reductive and non-reductive mechanisms for iron uptake and present important specificities compared to land plants. Since the majority of the molecular actors required for iron acquisition in algae are not conserved in land plants, questions arise about the evolution of the Fe uptake processes upon land colonization.
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