Changes induced by Fe deficiency and Fe resupply in the organic acid metabolism of sugar beet (Beta vulgaris) leaves

Physiologia Plantarum
Ana Flor López-MillánJ Abadía

Abstract

The effects of iron deficiency and iron resupply on the metabolism of leaf organic acids have been investigated in hydroponically grown sugar beet. Organic acid concentrations and activities in leaf extracts of several enzymes related to organic acid metabolism were measured. Enzymes assayed included phosphoenol pyruvate carboxylase (PEPC; EC 4.1.1.31), different Krebs cycle enzymes: malate dehydrogenase (MDH; EC 1.1.1.37), aconitase (EC 4.2.1.3), fumarase (EC 4.2.1.2), citrate synthase (CS; EC 4.1.3.7) and isocitrate dehydrogenase (ICDH; EC 1.1.1.42), glucose-6-phosphate dehydrogenase (G6PDH; EC 1.1.1.49) and two enzymes related to anaerobic metabolism (lactate dehydrogenase [LDH]; EC 1.1.1.27, and pyruvate decarboxylase [PDC]; EC 4.1.1.1). Iron concentration in leaves was severely decreased by iron deficiency. Iron resupply caused an increase in iron concentrations, reaching levels similar to the controls in 96 h. Iron deficiency induced a 2.3-fold (from 16 to 37 mmol m-2) increase in leaf total organic acid concentration. Organic anion concentrations were still 4-fold higher than the controls 24 h after resupply and decreased to values similar to those found in the controls after 96 h. All measured enzymes had increased acti...Continue Reading

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Citations

Jan 31, 2012·Plant Physiology and Biochemistry : PPB·Maribela PestanaAmarilis de Varennes
Jun 9, 2009·Food and Chemical Toxicology : an International Journal Published for the British Industrial Biological Research Association·David M PereiraPaula B Andrade
Apr 17, 2007·Comptes rendus biologies·Henda MahmoudiChedly Abdelly
Mar 25, 2016·Plant Physiology and Biochemistry : PPB·Florinda GamaMaribela Pestana
May 15, 2016·Plant Physiology and Biochemistry : PPB·Pia Muhammad Adnan RamzaniMuhammad Shahid
Mar 21, 2009·Food and Chemical Toxicology : an International Journal Published for the British Industrial Biological Research Association·David M PereiraMariana Sottomayor
Nov 1, 2011·Plant & Cell Physiology·Jorge Rodríguez-CelmaAna-Flor López-Millán
Sep 18, 2010·Journal of Separation Science·Patrícia ValentãoFederico Ferreres
Nov 28, 2020·Plant Physiology and Biochemistry : PPB·Lidan CaoYonghua Zhu
Nov 25, 2019·Ecotoxicology and Environmental Safety·Eloy Navarro-LeónBegoña Blasco
Jan 17, 2013·Journal of Proteome Research·Jorge Rodríguez-CelmaAna-Flor López-Millán

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