1. Iron uptake and homeostasis related genes in potato cultivated in vitro under iron deficiency and overload.
- Author
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Legay S, Guignard C, Ziebel J, and Evers D
- Subjects
- Amino Acid Sequence, Biological Transport, Biomass, Cluster Analysis, Culture Media, Ferritins genetics, Iron analysis, Iron Deficiencies, Magnesium analysis, Minerals analysis, Molecular Sequence Data, Plant Roots genetics, Plant Roots metabolism, Plant Roots physiology, Plant Shoots genetics, Plant Shoots metabolism, Plant Shoots physiology, Plant Stems genetics, Plant Stems metabolism, Plant Stems physiology, RNA, Plant genetics, Real-Time Polymerase Chain Reaction, Sequence Alignment, Solanum tuberosum genetics, Solanum tuberosum physiology, Time Factors, Zinc analysis, Gene Expression Regulation, Plant, Homeostasis, Iron metabolism, Plant Proteins genetics, Solanum tuberosum metabolism
- Abstract
Potato is one of the most important staple food in the world because it is a good source of vitamin C, vitamin B6 but also an interesting source of minerals including mainly potassium, but also magnesium, phosphorus, manganese, zinc and iron to a lesser extent. The lack of iron constitutes the main form of micronutrient deficiency in the world, namely iron deficiency anemia, which strongly affects pregnant women and children from developing countries. Iron biofortification of major staple food such as potato is thus a crucial issue for populations from these countries. To better understand mechanisms leading to iron accumulation in potato, we followed in an in vitro culture experiment, by qPCR, in the cultivar Désirée, the influence of media iron content on the expression of genes related to iron uptake, transport and homeostasis. As expected, plantlets grown in a low iron medium (1 mg L(-1) FeNaEDTA) displayed a decreased iron content, a strong induction of iron deficiency-related genes and a decreased expression of ferritins. Inversely, plantlets grown in a high iron medium (120 mg L(-1) FeNaEDTA) strongly accumulated iron in roots; however, no significant change in the expression of our set of genes was observed compared to control (40 mg L(-1) FeNaEDTA)., (Copyright © 2012 Elsevier Masson SAS. All rights reserved.)
- Published
- 2012
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