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. 2020 Nov 14;9(11):1578. doi: 10.3390/plants9111578

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© 2020 by the authors.

Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/).

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A model for Fe uptake and translocation in kiwifruit plants under direct Fe deficiency (-Fe) (a) and bicarbonate-induced Fe deficiency (+Bic) (b) conditions. Red and blue-colored parameters or processes represent positive and negative effects, respectively. Gray-shaded parameters in symplast space represent these parameters not identified in the current study. Parameters not in bold indicate these parameters less affected by -Fe and +Bic stresses. The thicker of the arrow representing Fe uptake and translocation, the higher of Fe amount contained. Ala, alanine; αKG, α-ketoglutarate; FCR, ferric chelate reductase; GABA, γ-aminobutyric acid; GABA-T, γ-aminobutyric acid transaminase; Glu, glutamic acid; GLUDH, glutamate dehydrogenase; GS/GOGAT, glutamine synthetase/glutamate synthase; Ile, isoleucine; Leu, leucine; OAA, oxaloacetic acid; P5C/GSA, pyrroline-5-carboxylate/glutamate-semialdehyde; P5CR, pyrroline-5-carboxylate reductase; P5CS, pyrroline-5-carboxylate synthase; PEPC, phosphoenol pyruvate carboxylase; Pro, proline; SSA, succinic semialdehyde; SSADH, succinic semialdehyde dehydrogenase; Suc, succinic acid; TCA, tricarboxylic acid; Thr, threonine; Val, valine.