Plant genotype and Zn fertilization effects on nutritional quality of wheat grain: Implications for human health
Screening wheat genotypes for their nutritional quality is a prerequisite step for biofortification programs. This study was carried out to evaluate the concentrations of minerals and phytic acid in the shoot and grains of several wheat genotypes in response to Zn fertilization. A field experiment was conducted in a severely Zn-deficient soil (Typic Calcigypsids) in central Iran. Sixty five commercial bread wheat genotypes (Triticum aestivum L.) were planted in plots with (40kg(Zn)·ha-1 as ZnSO<,4>) and without added Zn. Concentrations of Zn, Cd and Fe were separately determined in the grain and shoot of genotypes. In addition, phytic acid content of whole grain and bran-free flour of selected genotypes was measured. Both in the presence and absence of added Zn, wheat genotypes were different in their ability to accumulate Zn, Fe, and Cd in their grains. The molar ratio of phytic acid to Zn in whole grain and bran-free flour was greatly different among studied genotypes. Some genotypes were more efficient in extracting Zn and Fe from Zn-deficient soil while others accumulated very low levels of Fe and Zn in their grains. Application of Zn-fertilizer increased concentrations of Zn in the shoot and grain of some genotypes while it had no effect or even significantly decreased Zn concentrations in others. Addition of Zn had also different effects on Fe concentrations in grain and shoot of genotypes. The results showed that under studied conditions, nutritional quality of wheat grains for human health depends on both plant genotype and Zn- fertilization.
wheat zinc iron cadmium phytic acid
A. H. Khoshgoftarmanesh M. H. Mirzapour H. R. Sharifi M. R. Schulin
Dept. of Soil Sci., College of Agric., Isfahan Univ. of Tech., Isfahan, Iran Unit of Soil Research, Jihad-Agricultural Organization, Qom, Iran Division of Cereals, Iranian Institute of Seed and Seedling Preparation, Karaj, Iran Institute of Terrestrial Ecology, ETH Zuerich, Universitaetstr. 16, CH-8092 Zuerich, Switzerland
国际会议
第九届痕量元素生物地球化学国际会议(9th International Conference on the Biogeochemistry of Trace Elements)
北京
英文
273-274
2007-07-15（万方平台首次上网日期，不代表论文的发表时间）