Evidence for the mechanisms of zinc uptake by rice using isotope fractionation.

Plant, Cell & Environment
Tim ArnoldDominik J Weiss

Abstract

In an earlier study, we found that rice (Oryza sativa) grown in nutrient solution well-supplied with Zn preferentially took up light (64)Zn over (66)Zn, probably as a result of kinetic fractionation in membrane transport processes. Here, we measure isotope fractionation by rice in a submerged Zn-deficient soil with and without Zn fertilizer. We grew the same genotype as in the nutrient solution study plus low-Zn tolerant and intolerant lines from a recombinant inbred population. In contrast to the nutrient solution, in soil with Zn fertilizer we found little or heavy isotopic enrichment in the plants relative to plant-available Zn in the soil, and in soil without Zn fertilizer we found consistently heavy enrichment, particularly in the low-Zn tolerant line. These observations are only explicable by complexation of Zn by a complexing agent released from the roots and uptake of the complexed Zn by specific root transporters. We show with a mathematical model that, for realistic rates of secretion of the phytosiderophore deoxymugineic acid (DMA) by rice, and realistic parameters for the Zn-solubilizing effect of DMA in soil, solubilization and uptake by this mechanism is necessary and sufficient to account for the measured Zn upta...Continue Reading

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Citations

Jan 5, 2011·Journal of Experimental Botany·Cristina CaldelasDominik Jakob Weiss
Nov 1, 2013·Planta·Stefanie HöllerMichael Frei
Sep 23, 2014·Journal of Plant Physiology·Stefanie HöllerMichael Frei
Jan 19, 2016·Trends in Plant Science·Eva Oburger, Hannes Schmidt
Jul 23, 2011·Plant, Cell & Environment·Mariya PtashnykGuy J D Kirk
Aug 4, 2016·Environmental Science & Technology·Matthias WiggenhauserEmmanuel Frossard
Jun 24, 2014·Environmental Science & Technology·David HoubenSophie Opfergelt
Dec 3, 2016·Scientific Reports·Sarah E Johnson-BeeboutOliver B Castillo
Nov 24, 2018·Journal of Integrative Plant Biology·Yuta Kawakami, Navreet K Bhullar
Mar 16, 2017·Functional & Integrative Genomics·Tirthankar BandyopadhyayJitender Giri
Jun 18, 2017·TAG. Theoretical and applied genetics. Theoretische und angewandte Genetik·Jae-Sung LeeMatthias Wissuwa
Sep 13, 2017·Plant, Cell & Environment·Marie-Cecile AffholderGuy J D Kirk
Sep 26, 2020·Journal of Experimental Botany·Yuta Kawakami, Navreet K Bhullar
Nov 12, 2020·Journal of Experimental Botany·Marc HanikenneHatem Rouached
May 1, 2014·Comprehensive Reviews in Food Science and Food Safety·Zaigham ShahzadAllah Rakha
May 28, 2021·Planta·Harmanjit Kaur, Neera Garg
Jun 24, 2020·The Science of the Total Environment·Anne-Marie Desaulty, Emmanuelle Petelet-Giraud
Jan 18, 2022·Plant, Cell & Environment·Sahand AminiMarc Hanikenne

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