{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,3,22]],"date-time":"2026-03-22T05:54:28Z","timestamp":1774158868271,"version":"3.50.1"},"reference-count":55,"publisher":"Oxford University Press (OUP)","issue":"5","license":[{"start":{"date-parts":[[2020,12,17]],"date-time":"2020-12-17T00:00:00Z","timestamp":1608163200000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/academic.oup.com\/journals\/pages\/open_access\/funder_policies\/chorus\/standard_publication_model"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":[],"published-print":{"date-parts":[[2021,2,27]]},"abstract":"<jats:title>Abstract<\/jats:title>\n               <jats:p>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)\u2013DMA 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)\u2013DMA 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.<\/jats:p>","DOI":"10.1093\/jxb\/eraa580","type":"journal-article","created":{"date-parts":[[2020,12,11]],"date-time":"2020-12-11T06:49:33Z","timestamp":1607669373000},"page":"1517-1526","source":"Crossref","is-referenced-by-count":11,"title":["Unravelling the <i>modus operandi<\/i> of phytosiderophores during zinc uptake in rice: the importance of geochemical gradients and accurate stability constants"],"prefix":"10.1093","volume":"72","author":[{"ORCID":"https:\/\/orcid.org\/0000-0003-0453-8361","authenticated-orcid":false,"given":"George H R","family":"Northover","sequence":"first","affiliation":[{"name":"Department of Earth Science and Engineering, Imperial College London, London, UK"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Enrique","family":"Garcia-Espa\u00f1a","sequence":"additional","affiliation":[{"name":"Instituto de Ciencia Molecular, University of Valencia, Paterna, Spain"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-8074-9430","authenticated-orcid":false,"given":"Dominik J","family":"Weiss","sequence":"additional","affiliation":[{"name":"Department of Earth Science and Engineering, Imperial College London, London, UK"},{"name":"Department of Civil and Environmental Engineering, Princeton University, Princeton, NJ, USA"}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"286","published-online":{"date-parts":[[2020,12,17]]},"reference":[{"key":"2021030204430448100_CIT0001","doi-asserted-by":"crossref","first-page":"3018","DOI":"10.1111\/pce.13069","article-title":"Soil CO2 venting as one of the mechanisms for tolerance of Zn deficiency by rice in flooded soils","volume":"40","author":"Affholder","year":"2017","journal-title":"Plant, Cell & Environment"},{"key":"2021030204430448100_CIT0002","doi-asserted-by":"crossref","first-page":"311","DOI":"10.1016\/S0010-8545(98)00260-4","article-title":"Hyperquad simulation and speciation (HySS): a utility program for the investigation of equilibria involving soluble and partially soluble species","volume":"184","author":"Alderighi","year":"1999","journal-title":"Coordination Chemistry Reviews"},{"key":"2021030204430448100_CIT0003","doi-asserted-by":"crossref","first-page":"5438","DOI":"10.1021\/es300335u","article-title":"Weak organic ligands enhance zinc uptake in marine phytoplankton","volume":"46","author":"Aristilde","year":"2012","journal-title":"Environmental Science & Technology"},{"key":"2021030204430448100_CIT0004","doi-asserted-by":"crossref","first-page":"370","DOI":"10.1111\/j.1365-3040.2009.02085.x","article-title":"Evidence for the mechanisms of zinc uptake by rice using isotope fractionation","volume":"33","author":"Arnold","year":"2010","journal-title":"Plant, Cell & Environment"},{"key":"2021030204430448100_CIT0005","doi-asserted-by":"crossref","first-page":"397","DOI":"10.1016\/j.crte.2015.05.005","article-title":"Iron and zinc isotope fractionation during uptake and translocation in rice (Oryza sativa) grown in oxic and anoxic soils","volume":"347","author":"Arnold","year":"2015","journal-title":"Comptes Rendus - Geoscience"},{"key":"2021030204430448100_CIT0006","first-page":"303","article-title":"Introduction to the specific interaction theory with emphasis on chemical equilibria.","volume-title":"Metal complexes in solution","author":"Biederman","year":"1986"},{"key":"2021030204430448100_CIT0007","doi-asserted-by":"crossref","first-page":"510","DOI":"10.1039\/c004880a","article-title":"Cytosolic metal handling in plants: determinants for zinc specificity in metal transporters and metallothioneins","volume":"2","author":"Blindauer","year":"2010","journal-title":"Metallomics: Integrated Biometal Science"},{"key":"2021030204430448100_CIT0008","doi-asserted-by":"crossref","first-page":"1227","DOI":"10.1007\/s10953-006-9057-6","article-title":"Critical evaluation of protonation constants. 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