Predicting molybdenum toxicity to higher plants: estimation of toxicity threshold values

Environmental Pollution
Steve P McGrathS Fozard

Abstract

Four plant species (oilseed rape, Brassica napus L.; red clover, Trifolium pratense L.; ryegrass, Lolium perenne L.; and tomato, Lycopersicon esculentum L.) were tested on ten soils varying widely in soil properties to assess molybdenum (Mo) toxicity. A larger range (66-fold-609-fold) of added Mo concentrations resulting in 50% inhibition of yield (ED50) was found among soils than among plant species (2-fold-38-fold), which illustrated that the soils differed widely in the expression of Mo toxicity. Toxicity thresholds based on soil solution Mo narrowed the variation among soils compared to thresholds based on added Mo concentrations. We conclude that plant bioavailability of Mo in soil depends on Mo solubility, but this alone did not decrease the variability in observed toxicity enough to be used in risk assessment and that other soil properties influencing Mo toxicity to plants need to be considered.

References

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Oct 20, 2005·Dalton Transactions : an International Journal of Inorganic Chemistry·Ralf R Mendel
Mar 29, 2006·Environmental Toxicology and Chemistry·Corinne P RooneySteve P McGrath
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Citations

Oct 19, 2010·Ecotoxicology and Environmental Safety·Cornelis A M van GestelMaria Diez Ortiz
Jan 17, 2012·Environmental Pollution·Cornelis A M van GestelKoen Oorts
Jul 27, 2010·Environmental Pollution·S P McGrathF J Zhao
Nov 20, 2014·Environmental Science and Pollution Research International·Naser A AnjumIqbal Ahmad
Jun 10, 2016·Environmental Monitoring and Assessment·Magdalena ZaborowskaJadwiga Wyszkowska
Jul 1, 2016·The Science of the Total Environment·Wolfram BussOndřej Mašek
Feb 16, 2018·Journal of Experimental Botany·Elisa AndresenHendrik Küpper
Jul 11, 2018·Environmental Science and Pollution Research International·Jie WangYahua Chen
Nov 14, 2020·Environmental Science and Pollution Research International·Prashant K SharmaKavita Shah

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