Query (optional)   in Class  All Allele Author Colleague Collection Assembly Gene Gene Class Gene Product Germplasm Image Journal Keyword Library Locus Map Map Data Marker Pathology Polymorphism Probe Protein QTL Rearrangement Reference Sequence Species Trait Trait Study Two Point Data  

---

GrainGenes Reference Report: JPN-25-113

[Submit comment/correction]

Reference	JPN-25-113
Title	Phytic acid and phosphorus concentrations in seeds of wheat cultivars grown with and without zinc fertilization
Journal	Journal of Plant Nutrition
Year	2002
Volume	25
Pages	113-127
Author	Erdal I [ Show all 6 ]
Abstract	Summary: Seeds of twenty wheat cultivars grown with (+Zn = 23 kg Zn ha(-1)) and without zinc (Zn) fertilization in a Zn-deficient calcareous soil in Central Anatolia were analyzed for the levels of Zn, phosphorus (P), phytic acid, and phytase activity. Additionally, seeds of four wheat cultivars grown on 55 different locations in Turkey were also analyzed for Zn, P, and phytic acid. In the field experiment with 20 wheat cultivars, seed Zn concentrations showed a range between 7 to 11 mg kg(-1) under Zn-deficient and 14 to 23 mg kg(-1) under Zn-added conditions. Zinc fertilization reduced seed concentrations of P and phytic acid of all cultivars. On average, the reductions caused by Zn fertilization were from 3.9 to 3.5 mg g(-1) for P and from 10.7 to 9.1 mg g(-1) for phytic acid. Irrespective of Zn fertilization, seed phytic acid concentrations showed a large genotypic variation, i.e., from 7 to 12 mg g(-1) with Zn fertilization and 8 to 13 mg g(-1) at nil Zn treatment. As a result of decreases in phytic acid and increases in Zn concentrations by Zn fertilization, phytic acid to Zn molar ratios in seeds of cultivars markedly decreased. On average for all cultivars, phytic acid to Zn molar ratios decreased from 126 to 56 with Zn fertilization. Seed phytase activity of cultivars was not consistently influenced by varied Zn supply. However, on average for 20 cultivars, Zn fertilization tended to decrease phytase activity. In seeds of four wheat cultivars collected from 55 locations, the concentrations of Zn, P, and phytic acid ranged from 8 to 34 mg kg(-1), 2.1 to 4.9 mg g(-1), and 5.8 to 14.3 mg kg(-1), respectively. Results obtained in the present study indicate that seed Zn concentrations of wheat cultivars grown in different locations of Turkey, especially under Zn-deficient conditions, are very low. Considering very high phytic acid:Zn molar ratios it can be suggested that bioavailability of Zn would be very low for humans
Keyword	[ Hide all but 1 of 28 ] bioavailability concentration enzyme activity fertilization fertilizers field field experiment genetic variation genotypic variation human humans locations mineral content nil nutrient availability nutrient content nutrition genotype interaction phosphorus phytase phytic acid ratios reduction soil treatment triticum aestivum turkey zinc zn

GrainGenes is a product of the Agricultural Research Service of the US Department of Agriculture.