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

A - Papers appearing in refereed journals

McGrath, S. P., Mico, C., Zhao, F-J., Stroud, J. L., Zhang, H. and Fozard, S. 2010. Predicting molybdenum toxicity to higher plants: estimation of toxicity threshold values. Environmental Pollution. 158 (10), pp. 3085-3094.

AuthorsMcGrath, S. P., Mico, C., Zhao, F-J., Stroud, J. L., Zhang, H. and Fozard, S.
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.

Year of Publication2010
JournalEnvironmental Pollution
Journal citation158 (10), pp. 3085-3094
Digital Object Identifier (DOI)doi:10.1016/j.envpol.2010.06.030
Open accessPublished as non-open access
Funder project or codeSEF
Toxicity and bioavailability of molybdenum in terrestrial environments
Output statusPublished
Publication dates
Online24 Jul 2010
Publication process dates
Accepted19 Jun 2010
PublisherElsevier Sci Ltd
ISSN0269-7491

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