Journal
JOURNAL OF FOOD COMPOSITION AND ANALYSIS
Volume 22, Issue 4, Pages 278-284Publisher
ACADEMIC PRESS INC ELSEVIER SCIENCE
DOI: 10.1016/j.jfca.2008.11.022
Keywords
Low phytic acid; Rice; Oryza sativa L; Soybean; Glycine max L. Merr.; Divalent cations; Calcium; Iron; Zinc; Cadmium; Molar ratios; Anti-nutrient; Food safety; Food composition
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The objective of the study was to investigate the influence of mutational breeding on the contents of nutritionally relevant minerals in low phytic acid (Ipa) mutants compared to their wild-types. Three Ipa rice (Os-lpa-XQZ-1, Os-lpa-XS110-1, Os-lpa-XS110-2) and two lpa soybean mutants (Gm-lpa-TW75-1, Gm-lpa-ZC-2) were analyzed regarding their contents of phytic acid. lower inositol phosphates and the minerals calcium, iron and zinc. Additionally, cadmium was included into the spectrum of divalent cations analyzed. The phytic acid reduction in Ipa rice was consistently more pronounced in os-lpa-XS110-1 than in Os-lpa-XQZ-1 and Os-lpa-XS110-2. However, only for Os-lpa-XQZ-1, levels of calcium, iron and zinc were found to be consistently increased, whereas the cadmium level was shown to be predominantly decreased compared to the wild-type. Investigation of the two lpa soybean mutants, characterized by absence (Gm-lpa-TW75-1) and accumulation (Gm-lpa-ZC-2) of lower inositol phosphates, respectively, revealed no consistently decreased or increased contents of calcium, iron, zinc and cadmium. The data do not change the view that Ipa mutations do not result in systematic increases or decreases of mineral contents in these crops. However, on the basis of the molar ratios of phyrtate/minerals in lpa rice and soybean mutants which are considered as predictive parameters, an improved bioavailability of minerals in the lpa materials can be expected. (C) 2009 Elsevier Inc. All rights reserved.
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