Biofortification and subcellular localization of minerals in faba bean as influenced by Mg foliar application
DOI:
https://doi.org/10.5073/JABFQ.2016.089.008Keywords:
Biofortification, Magnesium, Foliar fertilization, Apoplast, Symplast, Vicia faba, Ion antagonismAbstract
Foliar application of Mg is a measure for the correction of Mg deficiency in crop plants. Foliar applied nutrients need to access the symplastic side where majority of physiological processes take place. To achieve an adequate uptake of the Mg ions through the leaf surface, high concentrations of of 100-200 mM MgSO4 are usually supplied. This can cause antagonistic perturbations on the subcellular distribution of Caand K cations. To test for such unintended side effects, we used the infiltration-centrifugation method to extract ions from the apoplastic and symplastic side of Vicia faba leaves and quantified concentrations of Mg, Ca and K in dependency to the dose of the foliar fertilized Mg. Results show that a large fraction of Mg accesses the symplast whereas the apoplastic fraction shows a concomitant increase. Symplastic and apoplastic K and Ca relations were only affected under conditions of high exogenous leaf supply of Mg (200 mM) but did not change upon moderate Mg supply (50; 100 mM). Overall, results reveal the suitability of leaf fertilization to biofortify plant-based products with magnesium. With respect to human nutrition, care must be taken that K and Ca do not become impoverished based on antagonistic effects.
Downloads
Published
Issue
Section
License
From Volume 86 (2013) on, the content of the journal is licensed under the Creative Commons Attribution-ShareAlike 4.0 License. Any user is free to share and adapt (remix, transform, build upon) the content as long as the original publication is attributed (authors, title, year, journal, issue, pages) and the new work is licensed under a CC-BY-SA compatible license.
The copyright of the published work remains with the authors. If you want to use published content beyond what the CC-BY-SA license permits, please contact the corresponding author, whose contact information can be found on the last page of the respective article. In case you want to reproduce content from older issues (before CC BY-SA applied), please contact the corresponding author to ask for permission.