Distribution and Speciation of Iron and Zinc in Grain of Two Wheat Genotypes

被引：70
作者：
Eagling, Tristan [1 ]
Neal, Andrew L. [1 ]
McGrath, Steve P. [1 ]
Fairweather-Tait, Susan [2 ]
Shewry, Peter R. [1 ]
Zhao, Fang-Jie [3 ]
机构：
[1] Rothamsted Res, Harpenden AL5 2JQ, Herts, England
[2] Univ E Anglia, Norwich Med Sch, Norwich NR4 7TJ, Norfolk, England
[3] Nanjing Agr Univ, Coll Resources & Environm Sci, State Key Lab Crop Genet & Germplasm Enhancement, Nanjing 210095, Jiangsu, Peoples R China
来源：
JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY | 2014年 / 62卷 / 03期
基金：
英国生物技术与生命科学研究理事会;
关键词：
wheat; iron; zinc; speciation; phytic acid; nicotianamine; deoxymugenic acid; INOSITOL PHOSPHATES; RICE SEEDS; NICOTIANAMINE; PHYTATE; QUANTIFICATION; ACTIVATION; TRANSPORT; FERRITIN; METAL; ACID;
D O I：
10.1021/jf403331p
中图分类号：
S [农业科学];
学科分类号：
09 ;
摘要：
This study aimed to determine differences among wheat cultivars in the distribution and speciation of Fe and Zn in grain milling fractions. Cultivars with higher Fe and Zn concentrations in the wholemeal flour were found to contain higher concentrations in the white flour. Soluble Fe and Zn were extracted and analyzed by size exclusion-inductively coupled plasma mass spectrometry. Fe speciation varied between milling fractions with a low molecular weight (LMW) complex likely to be Fe- deoxymugenic acid/nicotianamine being the predominant extractable Fe species in white flour, accounting for approximately 85% of the extractable Fe. Bran fractions had a lower amount of LMW-Fe form but more as soluble Fe phytate and an unidentified high molecular weight peak. In the white flour fraction soluble Zn was found to be present mainly as a LMW peak likely to be Zn-nicotianamine complex. Soluble Fe-phytate was found in the white flour fraction of a high-Fe cultivar but not in a low-Fe cultivar.
引用
收藏
页码：708 / 716
页数：9
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