title: Impacts of phosphorus and zinc levels on phosphorus and zinc nutrition and phytic acid concentration in wheat (Triticum aestivum L.).
abstract: BACKGROUND
  Zinc (Zn) and phytic acid content in grain crops are directly related to their nutritional quality and therefore human health. To investigate the nutritional influences of phosphorus (P) and Zn levels on wheat (Triticum aestivum L.), plants were grown hydroponically to maturity in chelator-buffered solutions.
  
  
  RESULTS
  Appropriate amounts of P, coupled with sufficient Zn, increased P and Zn concentrations in wheat grain. The Zn supply decreased both phytic acid and the molar ratios of phytic acid to Zn in wheat grain with respect to the Zn(0) treatment. Furthermore, proportions of Zn and P content in the grain relative to that of the whole plant were improved. With increasing P, the proportion of Zn and P content in the grain relative to the whole plant decreased. P and Zn acted antagonistically in roots. Excess P inhibited Zn uptake in roots, while Zn decreased the transfer of P from roots to shoots. For P that had been transported to the shoots, supplemental Zn facilitated its transfer to the grain.
  
  
  CONCLUSIONS
  Excess P decreased the distribution of Zn in grain, while Zn enhanced the uptake of Zn and P in grain, The combined application of Zn fertilizer with the extensive use of P fertilizer can effectively increase the P and Zn concentration and Zn bioavailability of wheat grain, and hence Zn nutritional quality.
authors.affiliation: College of Resources and Environment, Northwest A&F University, Key Laboratory for Agricultural Resources and Environmental Remediation in Loess Plateau of Agriculture, Yangling, Shaanxi, China.
authors.forename: Xi-wen
authors.initials: XW
authors.lastname: Yang
authors.forename: Xiao-hong
authors.initials: XH
authors.lastname: Tian
authors.forename: Xin-chun
authors.initials: XC
authors.lastname: Lu
authors.forename: Yu-xian
authors.initials: YX
authors.lastname: Cao
authors.forename: Zi-hui
authors.initials: ZH
authors.lastname: Chen
mesh_terms: D000465:Algorithms; D001692:Biological Transport; D002614:Chelating Agents / Q000737:chemistry; D004492:Edetic Acid / Q000031:analogs & derivatives / Q000737:chemistry; D005308:Fertilizers; D018527:Hydroponics; D009753:Nutritive Value; D009994:Osmolar Concentration; D010758:Phosphorus / Q000737:chemistry / Q000378:metabolism*; D010833:Phytic Acid / Q000378:metabolism*; D018517:Plant Roots / Q000378:metabolism; D018547:Plant Stems / Q000378:metabolism; D012639:Seeds / Q000378:metabolism*; D014908:Triticum / Q000378:metabolism*; D015032:Zinc / Q000737:chemistry / Q000378:metabolism*
chemical_list: D002614:Chelating Agents; D005308:Fertilizers; D010758:Phosphorus; D010833:Phytic Acid; D004492:Edetic Acid; D015032:Zinc; C026060:N-(hydroxyethyl)ethylenediaminetriacetic acid