Nitric oxide and glutathione impact the expression of iron uptake- and iron transport-related genes as well as the content of metals in <em>A. thaliana</em> plants grown under iron deficiency
2012
Koen, Emmanuel | Szymanska, Katarzyna | Klinguer, Agnès | Dobrowolska, Grażyna | Besson-Bard, Angelique | Wendehenne, David | Agroécologie [Dijon] ; Institut National de la Recherche Agronomique (INRA)-Université de Bourgogne (UB)-AgroSup Dijon - Institut National Supérieur des Sciences Agronomiques, de l'Alimentation et de l'Environnement | Institute of Biochemistry and Biophysics ; Pawinskiego 5a
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Afficher plus [+] Moins [-]anglais. Mounting evidence indicate that nitric oxide (NO) acts as a signaling molecule mediating iron deficiency responses through the upregulation of the expression of iron uptake-related genes. Accordingly, NO donors such as nitrosoglutathione (GSNO) were reported to improve the fitness of plants grown under iron deficiency. Here, we showed that glutathione, a by-product of GSNO, triggered the upregulation of the expression of iron uptake- and transport-related gene and an increase of iron concentration in <em>Arabidopsis thaliana</em> seedlings facing iron deficiency. Furthermore, we provided evidence that under iron deficiency, NO released by GSNO did not improve the root iron concentration but impacted the content of copper. Collectively, our data highlight the complexity of interpreting data based on the use of NO donors when investigating the role of NO in iron homeostasi
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