Abstract
Roots of potato plants (Solanum tuberosum cv Bintje) growing on low Fe nutrient solution developed the characteristic Fe efficiency reactions, such as high ferric reductase activity, proton extrusion and increased root hair formation. Roots from a tuber with sprout removed, when grown on Fe-free nutrient solution, also expressed these reactions; transfer to iron-containing medium resulted in their complete disappearance within 10 days. Roots growing on 2% sucrose in sterile Murashige-Skoog medium increased their ferric reductase activity upon withholding Fe and formed transfer cells. It is concluded that potato roots themselves control the development of Fe-efficiency reactions, and that the shoot may exert a modulating influence on their expression.
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- Bienfait H. F. Regulated redox processes at the plasmalemma of plant root cells and their function in iron uptake. J Bioenerg Biomembr. 1985 Apr;17(2):73–83. doi: 10.1007/BF00744199. [DOI] [PubMed] [Google Scholar]
- Chaney R. L., Brown J. C., Tiffin L. O. Obligatory reduction of ferric chelates in iron uptake by soybeans. Plant Physiol. 1972 Aug;50(2):208–213. doi: 10.1104/pp.50.2.208. [DOI] [PMC free article] [PubMed] [Google Scholar]
- Landsberg E. C. Function of Rhizodermal Transfer Cells in the Fe Stress Response Mechanism of Capsicum annuum L. Plant Physiol. 1986 Oct;82(2):511–517. doi: 10.1104/pp.82.2.511. [DOI] [PMC free article] [PubMed] [Google Scholar]
- Römheld V., Marschner H. Mechanism of iron uptake by peanut plants : I. Fe reduction, chelate splitting, and release of phenolics. Plant Physiol. 1983 Apr;71(4):949–954. doi: 10.1104/pp.71.4.949. [DOI] [PMC free article] [PubMed] [Google Scholar]
- Römheld V., Müller C., Marschner H. Localization and capacity of proton pumps in roots of intact sunflower plants. Plant Physiol. 1984 Nov;76(3):603–606. doi: 10.1104/pp.76.3.603. [DOI] [PMC free article] [PubMed] [Google Scholar]
- de Vos C. R., Lubberding H. J., Bienfait H. F. Rhizosphere acidification as a response to iron deficiency in bean plants. Plant Physiol. 1986 Jul;81(3):842–846. doi: 10.1104/pp.81.3.842. [DOI] [PMC free article] [PubMed] [Google Scholar]