Cerdán Mar, Alcañiz Sara, Juárez Margarita, Jordá Juana D, Bermúdez Dolores
Agrochemistry and Biochemistry Department, Faculty of Sciences, University of Alicante, 03690 San Vicente del Raspeig, Alicante, Spain.
J Agric Food Chem. 2006 Feb 22;54(4):1387-91. doi: 10.1021/jf051838e.
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).
用于纠正石灰性土壤和高碳酸氢盐含量水体中铁缺乏的最有效肥料之一是基于乙二胺-N,N'-双（邻羟基苯乙酸）铁[Fe(o,o-EDDHA)]。Fe(o,o-EDDHA)形成两组几何异构体，称为内消旋体和D,L-外消旋体。为了确定内消旋体和D,L-外消旋体Fe(o,o-EDDHA)的铁吸收情况，在水培条件下种植了四种铁高效植物，两种代表策略I的植物（番茄和辣椒）和两种代表策略II的植物（小麦和燕麦）。结果表明，策略II植物从两种Fe(o,o-EDDHA)异构体中吸收铁的量相同。然而，策略I植物主要吸收与内消旋体形式相关的铁（稳定性最低的异构体）。
