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Mechanism of Iron Uptake by Peanut Plants: I. FeIII Reduction, Chelate Splitting, and Release of Phenolics
Open accessAbstract
Iron deficiency in peanuts (Arachis hypogeae L.) caused an increase in release of caffeic acid, a higher rate of Fe(III) reduction, and increased rates of both Fe(III) chelate splitting and iron uptake.Experiments on Fe(III) reduction by phenolics (in vitro experiments) and by roots of Fe-deficient peanuts exclude the direct involvement of released phenolics in Fe(III) reduction by roots: Fe(III) reduction by phenolics had a pH optimum higher than 8.0 and was strongly dependent on the concentration and the stability of the supplied Fe(III) chelates. In contrast, Fe(III) reduction by roots of Fe-deficient peanuts had a pH optimum of about 5.0 and was less dependent on the stability of the supplied Fe(III) chelates. Furthermore, the observed release of phenolics into nutrient solution would have to be at least 200 times higher to attain the reduction rates of roots of Fe-deficient peanuts. The results of these experiments support the idea of an enzymic reduction of Fe(III) on the plasmalemma of cortical cells of roots.
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Citations
Cited by
Evidence for a Specific Uptake System for Iron Phytosiderophores in Roots of Grasses
Römheld, V., & Marschner, H. (1986) · Plant Physiology · doi:10.1104/pp.80.1.175 · Cited by 992
Self-citationMechanisms and regulation of reduction‐based iron uptake in plants
SCHMIDT, W. (1999) · New Phytologist · doi:10.1046/j.1469-8137.1999.00331.x · Cited by 406
Schmid, N. B., Giehl, R. F. H., Doll, S., Mock, H.-P., Strehmel, N., Scheel, D., Kong, X., Hider, R. C., & von Wiren, N. (2014) · PLANT PHYSIOLOGY · doi:10.1104/pp.113.228544 · Cited by 334
Molecular mechanisms governing Arabidopsis iron uptake
Brumbarova, T., Bauer, P., & Ivanov, R. (2015) · Trends in Plant Science · doi:10.1016/j.tplants.2014.11.004 · Cited by 332
Involvement of Superoxide Radical in Extracellular Ferric Reduction by Iron-Deficient Bean Roots
Cakmak, I., van de Wetering, D. A. M., Marschner, H., & Bienfait, H. F. (1987) · Plant Physiology · doi:10.1104/pp.85.1.310 · Cited by 102
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Metadata
- Authors
- Römheld, V., & Marschner, H.
- Venue
- Plant Physiology
- Publisher
- Oxford University Press (OUP)
- Published
- 1983-04-01
- Volume
- 71
- Issue
- 4
- Pages
- 949-954
- ISSN
- 0032-0889 (ISSN-L)
- 1532-2548
- OpenAlex
- W2053141423
- Cited by
- 402
- References
- 0
- FWCI
- 31.60
- Type
- journal article
- Language
- en
- Open access
- bronze
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- Römheld, V., & Marschner, H. (1983). Mechanism of Iron Uptake by Peanut Plants: I. FeIII Reduction, Chelate Splitting, and Release of Phenolics. Plant Physiology. https://doi.org/10.1104/pp.71.4.949
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Bibliographic data: Semantic Scholar, OpenAlex, Crossref.
Contains information from the Semantic Scholar Academic Graph Datasets, made available under the ODC Attribution License (ODC-BY 1.0).
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