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. 2018 Jan 19;9:10. doi: 10.3389/fpls.2018.00010

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Copyright © 2018 Waters, Amundsen and Graef.

This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) or licensor are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.

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Leaf chlorophyll, nutrient solution fluorescence, and total plant Fe accumulation in IDC tolerant and sensitive soybean plants. Plants were treated with 1 or 20 μM FeSO₄ and 0 or 2.5 mM sodium bicarbonate for 12 d. (A) leaf chlorophyll of first trifoliate leaf in SPAD units; (B) total fluorescence units of nutrient solution normalized to root FW; (C) Total plant Fe accumulation (content), in μg Fe per plant. ^* indicates a significant difference (p < 0.05) between treatment and control (20 Fe, 0 Bic). + indicates a significant difference between the tolerant and sensitive lines in that treatment.