Organic acids and Fe deficiency: a review

By J. Abadía, A. López-Millán, A. Rombolà, A. Abadı́a. Plant and Soil, 2002

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Biofortification of crops with seven mineral elements often lacking in human diets--iron, zinc, copper, calcium, magnesium, selenium and iodine. (2009, background): “…the rhizosphere, such as the exudation of protons, phytosiderophores and organic acids by roots, generally increase the concentrations of these elements in crops (Welch, 1995; Rengel, 2001; Abadía et al., 2002; Hoffland et al., 2006; Wissuwa et al., 2006; Ismail et al., 2007; Degryse et al., 2008).”
Preserving the nutritional quality of crop plants under a changing climate: importance and strategies (2019, background): “Several papers described organic acid concentration increases, mainly citrate and malate, in xylem sap, leaf apoplastic fluid and whole leaves of plants with Fe deficiency (Abadía et al. 2002; Larbi et al. 2010; LópezMillán et al. 2009; López-Millán et al. 2000).”
Rhizospheric organic compounds in the soil–microorganism–plant system: their role in iron availability (2014, background): “The accumulated citrate in roots could provide (i) carbon skeleton to chlorotic leaves to sustain growth and respiration (Abadía et al., 2002), (ii) reducing equivalents for ferrochelate reductase (FCR) through the cytosolic NADP+-dependent isocitrate dehydrogenase (ICDH) activity and (iii) 2-oxoglu”