Influence of phosphate on the arsenic uptake by wheat (Triticum durum L.) irrigated with arsenic solutions at three different concentrations

Massimo Pigna*, Vincenza Cozzolino, Antonio Violante, Andrew A. Meharg

*Corresponding author for this work

Research output: Contribution to journalArticle

83 Citations (Scopus)

Abstract

In this study we have investigated the uptake and distribution of arsenic (As) and phosphate (Pi) in roots, shoots, and grain of wheat grown in an uncontaminated soil irrigated with solutions containing As at three different concentrations (0.5, 1 and 2 mg l-1) and in the presence or in the absence of P fertilization. Arsenic in irrigation water reduced plants growth and decreased grain yield. When Pi was not added (P-), plants were more greatly impacted compared to the plus Pi (P+) treatments. The differences in mean biomass between P- and P+ treatments at the higher As concentrations demonstrated the role of Pi in preventing As toxicity and growth inhibition. Arsenic concentrations in root, shoot and grain increased with increasing As concentration in irrigation water. It appears that P fertilization minimizes the translocation of As to the shoots and grain whilst enhancing P status of plant. The observation that P fertilization minimises the translocation of arsenic to the shoots and grain is interesting and may be useful for certain regions of the world that has high levels of As in groundwater or soils.

Original languageEnglish
Pages (from-to)371-380
Number of pages10
JournalWater, Air, and Soil Pollution
Volume197
Issue number1-4
DOIs
Publication statusPublished - Feb 2009

Keywords

  • Arsenic
  • Groundwater contamination
  • P fertilization
  • Uptake
  • Wheat

ASJC Scopus subject areas

  • Pollution
  • Environmental Chemistry
  • Environmental Engineering
  • Ecological Modelling
  • Water Science and Technology

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