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Metal complex formation by nicotianamine, a possible phytosiderophore

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Summary

The acid dissociation constants of nicotianamine (1) (pK1=6.97, pK2=9.13, pK3=9.75; 0.1 M KClO4, 25°C) and the stability constants for its 1∶1 complexes with bivalent metal ions (log KCu=18.6, log KNi=16.1, log KCo=14.8, log KZn=14.7, log KFe=12.1, log KMn=8.8, log KMg≈4.5; 0.1 M KClO4, 25°C) were determined using potentiometric titrations in aqueous solution. Fe(III)-nicotianamine complexes were not detected under the same experimental conditions.

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Part 13 in the series ‘On the ‘normalizing factor’ for the tomato mutantchloronerva’, for part 12 see Ripperger et al.4.

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Beneš, I., Schreiber, K., Ripperger, H. et al. Metal complex formation by nicotianamine, a possible phytosiderophore. Experientia 39, 261–262 (1983). https://doi.org/10.1007/BF01955293

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