Please use this identifier to cite or link to this item: http://repositorio.ufla.br/jspui/handle/1/57064
Title: Iron counteracts zinc-induced toxicity in soybeans
Keywords: Soybean
Iron
Zinc
Micronutrient interaction
Chlorosis
Gene expression
Issue Date: Jan-2023
Publisher: Elsevier
Citation: OLIVEIRA, N. T. de et al. Iron counteracts zinc-induced toxicity in soybeans. Plant Physiology and Biochemistry, [S.l.], v. 194, p. 335-344, Jan. 2023.
Abstract: Zinc (Zn) and iron (Fe) are essential micronutrients for all living organisms and the major targets for crop biofortification. However, when acquired in excess quantities, Zn and Fe can be toxic to plants. In this study, we examined the interaction between Zn and Fe in soybean plants under various Zn and Fe treatments. While the level of Zn accumulation increased with increasing Zn supplies, Zn content greatly decreased with rising Fe supplies. Moreover, Zn uptake rates were negatively correlated with Fe supplies. However, Fe accumulation was not greatly affected by elevating Zn supplies. Excess Zn supplies were found to induce typical Fe deficiency symptoms under low Fe conditions, which can be counteracted by increasing Fe supplies. Interestingly, leaf chlorosis caused by excess Zn and low Fe supplies was not directly associated with reduced total Fe content but likely associated with deleterious effects of excess Zn. The combination of high Zn and low Fe greatly activates FRO2 and FIT1 gene expression in soybean roots. Besides, Zn-Fe interaction influences the activities of antioxidative enzymes as well as the uptake, accumulation, and homeostasis of other essential micronutrients, such as copper and manganese in soybean plants. These findings provide new perspectives on Zn and Fe interaction and on heavy metal-induced Fe deficiency-like symptoms.
URI: https://www.sciencedirect.com/science/article/pii/S0981942822005253
http://repositorio.ufla.br/jspui/handle/1/57064
Appears in Collections:DCS - Artigos publicados em periódicos

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