Use of Co speciation and soil properties to explain variation in Co toxicity to root growth of barley (Hordeum vulgare L.) in different soils

A - Papers appearing in refereed journals

Mico, C., Li, H. F., Zhao, F-J. and McGrath, S. P. 2008. Use of Co speciation and soil properties to explain variation in Co toxicity to root growth of barley (Hordeum vulgare L.) in different soils. Environmental Pollution. 156 (3), pp. 883-890.

AuthorsMico, C., Li, H. F., Zhao, F-J. and McGrath, S. P.
Abstract

The influence of soil properties on the bioavailability and toxicity of Co to barley (Hordeum vulgare L.) root elongation was investigated. Ten soils varying widely in soil properties were amended with seven doses of CoCl2. Soil properties greatly influenced the expression of Co toxicity. The effective concentration of added Co causing 50% inhibition (EC50) ranged from 45 to 863 mg kg−1, representing almost 20-fold variation among soils. Furthermore, we investigated Co toxicity in relation to Co concentrations and free Co2+ activity in soil solution. The EC50 values showed variation among soils of 17- and 29-fold, based on the Co concentration in soil solution and free Co2+ activity, respectively. Single regressions were carried out between Co toxicity threshold values and selected soil properties. Models obtained showed that soil effective cation exchange capacity (eCEC) and exchangeable calcium were the most consistent single predictors of the EC50 values based on soil added Co.

KeywordsCobalt; Soil properties; Plant toxicity; Barley; Bioavailability; Risk assessment
Year of Publication2008
JournalEnvironmental Pollution
Journal citation156 (3), pp. 883-890
Digital Object Identifier (DOI)doi:10.1016/j.envpol.2008.05.017
Open accessPublished as non-open access
FunderBiotechnology and Biological Sciences Research Council
Funder project or codeSEF
Toxicity and bioavailability of molybdenum in terrestrial environments
Soil protection and remediation
Output statusPublished
Publication dates
Online09 Jun 2008
Publication process dates
Accepted20 May 2008
PublisherElsevier Sci Ltd
ISSN0269-7491

Permalink - https://repository.rothamsted.ac.uk/item/8q09w/use-of-co-speciation-and-soil-properties-to-explain-variation-in-co-toxicity-to-root-growth-of-barley-hordeum-vulgare-l-in-different-soils

Restricted files

Publisher's version

Under embargo indefinitely

7 total views
0 total downloads
3 views this month
0 downloads this month