title: Effectiveness of Iron Ethylenediamine-N,N'-bis(hydroxyphenylacetic) Acid (o,o-EDDHA/Fe3+) Formulations with Different Ratios of Meso and d,l-Racemic Isomers as Iron Fertilizers.
abstract: Two o,o-EDDHA/Fe3+formulations (meso, 93.5% w/w of meso isomer; and d,l-racemic, 91.3% w/w of d,l-racemic mixture) were prepared, and their efficacy to avoid or to relieve iron deficiency in Fe-sufficient and Fe-deficient tomato plants grown on hydroponic solution was compared with that of the current o,o-EDDHA/Fe3+formulations (50% of meso and d,l-racemic isomers). The effectiveness of the three o,o-EDDHA/Fe3+formulations was different depending on the iron nutritional status of plants. The three o,o-EDDHA/Fe3+formulations tested were effective in preventing iron chlorosis in healthy plants. However, the higher the meso concentration in the formulations, the higher the effectiveness in the recovery of iron chlorotic plants from iron deficiency. Accordingly, o,o-EDDHA/Fe3+formulations rich in meso isomer are recommended in hydroponic systems.
authors.affiliation: Agrochemistry and Biochemistry Department, Faculty of Sciences, University of Alicante , 03690 San Vicente del Raspeig, Alicante, Spain.
authors.forename: Sara
authors.initials: S
authors.lastname: Alcañiz
authors.affiliation: Agrochemistry and Biochemistry Department, Faculty of Sciences, University of Alicante , 03690 San Vicente del Raspeig, Alicante, Spain.
authors.forename: Juana D
authors.initials: JD
authors.lastname: Jordá
authors.affiliation: Agrochemistry and Biochemistry Department, Faculty of Sciences, University of Alicante , 03690 San Vicente del Raspeig, Alicante, Spain.
authors.forename: Mar
authors.identifier: http://orcid.org/0000-0002-0636-1144
authors.initials: M
authors.lastname: Cerdán
mesh_terms: D005029:Ethylenediamines / Q000737:chemistry* / Q000494:pharmacology*; D005308:Fertilizers; D018527:Hydroponics; D007501:Iron / Q000737:chemistry / Q000378:metabolism / Q000494:pharmacology*; D007536:Isomerism; D018551:Solanum lycopersicum / Q000187:drug effects / Q000254:growth & development* / Q000378:metabolism
chemical_list: D005029:Ethylenediamines; D005308:Fertilizers; C011813:ethylenediamine-N,N'-bis(2-hydroxyphenylacetic acid); D007501:Iron
keywords: Lycopersicon esculentum Mill.; hydroponic culture; iron chelates; iron nutrition; iron uptake; o,o-EDDHA/Fe3+ isomers