Fe uptake from meso and D,L-racemic Fe(o,o-EDDHA) isomers by strategy I and II plants.
One of the most efficient fertilizers to correct Fe deficiency in calcareous soils and waters with high bicarbonate content is based on ferric ethylenediamine-N,N'-bis(o-hydroxyphenylacetic) acid [Fe(o,o-EDDHA)]. Fe(o,o-EDDHA) forms two groups of geometric isomers known as meso and D,L-racemic. To determine the Fe uptake from meso and D,L-racemic Fe(o,o-EDDHA), four iron-efficient plants, two plants representative of strategy I (tomato and pepper) and two plants representative of strategy II (wheat and oats), were grown in hydroponic culture. Results indicated that strategy II plants took up iron from both Fe(o,o-EDDHA) isomers equally. However, strategy I plants took mainly the iron associated with the meso form (the lowest stability isomer).
Agrochemistry and Biochemistry Department, Faculty of Sciences, University of Alicante, 03690 San Vicente del Raspeig, Alicante, Spain. mar.cerdan@ua.es
Mar
M
Cerdán
Sara
S
Alcañiz
Margarita
M
Juárez
Juana D
JD
Jordá
Dolores
D
Bermúdez
D018554:Avena / Q000378:metabolism; D002212:Capsicum / Q000378:metabolism; D005029:Ethylenediamines / Q000737:chemistry / Q000378:metabolism*; D005290:Ferric Compounds / Q000737:chemistry / Q000378:metabolism*; D005308:Fertilizers / Q000032:analysis; D007502:Iron Chelating Agents / Q000737:chemistry / Q000378:metabolism*; D018551:Solanum lycopersicum / Q000378:metabolism; D010944:Plants / Q000378:metabolism*; D012987:Soil / Q000032:analysis; D013237:Stereoisomerism; D014908:Triticum / Q000378:metabolism
D005029:Ethylenediamines; D005290:Ferric Compounds; D005308:Fertilizers; D007502:Iron Chelating Agents; D012987:Soil; C011813:ethylenediamine-N,N'-bis(2-hydroxyphenylacetic acid)