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. 2020 Nov 2;10:18839. doi: 10.1038/s41598-020-75317-w

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© The Author(s) 2020

Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons licence, and indicate if changes were made. The images or other third party material in this article are included in the article's Creative Commons licence, unless indicated otherwise in a credit line to the material. If material is not included in the article's Creative Commons licence and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this licence, visit http://creativecommons.org/licenses/by/4.0/.

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(a) H⁺ extrusion from roots of Fe-sufficient (Fe+) and for Fe-deficient (Fe−) microcuttings of Ramsey and 140R measured at 15, 30 and 60 min. (b) Time-course of root FCR activity. Reduction of Fe(III)-EDTA by the root apparatus measured after 30, 60, 90 and 120 min and expressed as nmol Fe(II) gFW-1 in Fe-sufficient (Fe+) and for Fe-deficient (Fe−) microcuttings of Ramsey and 140R. The statistical significance was determined by Student’s t-test (mean ± SE, n = 4 plants, *P < 0.05, **P < 0.01, ***P < 0.001).