Unravelling the modus operandi of phytosiderophores during zinc uptake in rice : the importance of geochemical gradients and accurate stability constants

© The Author(s) 2020. Published by Oxford University Press on behalf of the Society for Experimental Biology. All rights reserved. For permissions, please email: journals.permissionsoup.com.

Bibliographische Detailangaben
Veröffentlicht in:Journal of experimental botany. - 1985. - 72(2021), 5 vom: 27. Feb., Seite 1517-1526
1. Verfasser: Northover, George H R (VerfasserIn)
Weitere Verfasser: Garcia-España, Enrique, Weiss, Dominik J
Format: Online-Aufsatz
Sprache:English
Veröffentlicht: 2021
Zugriff auf das übergeordnete Werk:Journal of experimental botany
Schlagworte:Journal Article Research Support, Non-U.S. Gov't Deoxymugineic acid geochemical gradients microenvironment phytosiderophore rhizosphere rice (Oryza sativa) stability constants zinc uptake mehr... Soil Iron E1UOL152H7 Zinc J41CSQ7QDS
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520 |a © The Author(s) 2020. Published by Oxford University Press on behalf of the Society for Experimental Biology. All rights reserved. For permissions, please email: journals.permissionsoup.com. 
520 |a Micronutrient deficiencies threaten global food production. Attempts to biofortify crops rely on a clear understanding of micronutrient uptake processes. Zinc deficiency in rice is a serious problem. One of the pathways proposed for the transfer of zinc from soils into rice plants involves deoxymugineic acid (DMA), a phytosiderophore. The idea that phytosiderophores play a wider role in nutrition of Poaceae beyond iron is well established. However, key mechanistic details of the DMA-assisted zinc uptake pathway in rice remain uncertain. In particular, questions surround the form in which zinc from DMA is taken up [i.e. as free aqueous Zn(II) or as Zn(II)-DMA complexes] and the role of competitive behaviour of other metals with DMA. We propose that an accurate description of the effect of changes in pH, ligand concentration, and ionic strength on the stability of Zn(II)-DMA complexes in the presence of other metals in the microenvironment around root cells is critical for understanding the modus operandi of DMA during zinc uptake. To that end, we reveal the importance of geochemical changes in the microenvironment around root cells and demonstrate the effect of inaccurate stability constants on speciation models 
650 4 |a Journal Article 
650 4 |a Research Support, Non-U.S. Gov't 
650 4 |a Deoxymugineic acid 
650 4 |a geochemical gradients 
650 4 |a microenvironment 
650 4 |a phytosiderophore 
650 4 |a rhizosphere 
650 4 |a rice (Oryza sativa) 
650 4 |a stability constants 
650 4 |a zinc uptake 
650 7 |a Soil  |2 NLM 
650 7 |a Iron  |2 NLM 
650 7 |a E1UOL152H7  |2 NLM 
650 7 |a Zinc  |2 NLM 
650 7 |a J41CSQ7QDS  |2 NLM 
700 1 |a Garcia-España, Enrique  |e verfasserin  |4 aut 
700 1 |a Weiss, Dominik J  |e verfasserin  |4 aut 
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