A naturally occurring chelate of iron in xylem exudate
- 1 March 1961
- journal article
- research article
- Published by Oxford University Press (OUP) in Plant Physiology
- Vol. 36 (2), 226-231
- https://doi.org/10.1104/pp.36.2.226
Abstract
Com-parisons of the behavior of Fe in tobacco plant exudate and in a synthetic mixture of Fe and phosphate indicated the existence of a naturally occurring chelate of Fe in plant exudate which might serve as a transport form of Fe in plants. In contrast with Fe in synthetic mixtures, Fe in exudate was not removed by Millipore filtration; it moved on paper chromatograms; it was adsorbed by anion exchange resin, and it moved directly through a Sephadex gel filter column. These results indicate the exudate Fe is associated with a large anion. While the identity of the chelating agent has not been established as yet, the results indicate it is not an amino acid, ascorbic acid, nor an organic acid. The stability constant of the natural Fe complex appears to be between 17 and 20.7.This publication has 11 references indexed in Scilit:
- Differential Absorption of Metal Chelate Components by Plant RootsPlant Physiology, 1960
- Gel Filtration: A Method for Desalting and Group SeparationNature, 1959
- Observations on Chelates and Root GrowthPhysiologia Plantarum, 1957
- PAPER CHROMATOGRAPHY OF IRON COMPLEXES OF PORPHYRINSJournal of Biological Chemistry, 1955
- The Absorption and Translocation of IronPlant Physiology, 1953
- Nitrogen Metabolism of Apple TreesNature, 1953
- THE UPTAKE OF PHOSPHORUS BY BEAN PLANTS WITH PARTICULAR REFERENCE TO THE EFFECTS OF IRONPlant Physiology, 1952
- THE DETERMINATION OF DIKETO-L-GULONIC ACID, DEHY-DRO-L-ASCORBIC ACID, AND L-ASCORBIC ACID IN THE SAME TISSUE EXTRACT BY THE 2,4-DINI-TROPHENYLHYDRAZINE METHOD1948
- Colorimetric Determination of Iron with Disodium-1,2-dihydroxybenzene-3,5-disulfonateIndustrial & Engineering Chemistry Analytical Edition, 1944
- Effects of Auxin on Rates, Periodicity, and Osmotic Relations in ExudationAmerican Journal of Botany, 1938