Journal
SCIENTIFIC REPORTS
Volume 4, Issue -, Pages -Publisher
NATURE PUBLISHING GROUP
DOI: 10.1038/srep04944
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Funding
- States of the Federal Republic of Germany [B1.10]
- Swiss National Science Foundation [PZ00P2_142232]
- U.S. Department of Energy - Geosciences [DE-FG02-92ER14244]
- Brookhaven National Laboratory-Department of Environmental Sciences
- U.S. Department of Energy, Office of Science, Office of Basic Energy Sciences [DE-AC02-98CH10886]
- German Research Foundation
- Open Access Publication Funds of the TU Dresden
- Swiss National Science Foundation (SNF) [PZ00P2_142232] Funding Source: Swiss National Science Foundation (SNF)
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Elevated arsenic content in food crops pose a serious human health risk. Apart from rice wheat being another main food crop is possibly cultivated on contaminated sites. But for wheat uptake mechanisms are not entirely understood especially with regard to nutrient fertilization and different moisture regimes taking into account heavy rainfall events due to climate change. Here we show that especially higher P-fertilization under changing redox conditions may enhance arsenic uptake. This counteracts with higher N-fertilization reducing arsenic transfer and translocation into aboveground plant parts for both higher P-fertilization and reducing soil conditions. Arsenic speciation did not change in grain but for leaves P-fertilization together with reducing conditions increased the As(V) content compared to other arsenic species. Our results indicate important dependencies of nutrient fertilization, moisture conditions and substrate type on As accumulation of wheat as one of the most important crop plants worldwide with implications for agricultural practices.
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