Influence of Increasing Soil Copper Concentration on the Susceptibility of Phosphomonoesterase and Urease to Heat Disturbance

Wightwick, Adam M., Reichman, Suzanne M., Allinson, Graeme and Menzies, Neal W. (2013) Influence of Increasing Soil Copper Concentration on the Susceptibility of Phosphomonoesterase and Urease to Heat Disturbance. Water, Air and Soil Pollution, 224 12: 1-12. doi:10.1007/s11270-013-1775-y


Author Wightwick, Adam M.
Reichman, Suzanne M.
Allinson, Graeme
Menzies, Neal W.
Title Influence of Increasing Soil Copper Concentration on the Susceptibility of Phosphomonoesterase and Urease to Heat Disturbance
Journal name Water, Air and Soil Pollution   Check publisher's open access policy
ISSN 0049-6979
1573-2932
Publication date 2013-01-01
Sub-type Article (original research)
DOI 10.1007/s11270-013-1775-y
Volume 224
Issue 12
Start page 1
End page 12
Total pages 12
Place of publication Dordrecht, The Netherlands
Publisher Springer Netherlands
Collection year 2014
Language eng
Subject 2312 Water Science and Technology
2310 Pollution
2305 Environmental Engineering
2304 Environmental Chemistry
2302 Ecological Modelling
Abstract Long-term exposure to elevated copper (Cu) concentrations may affect the ability of soil microbes to withstand additional transient disturbances, such as heat. Bulk surface soil samples collected from three south east Australian locations were spiked with a series of Cu concentrations ranging from 0 to 1,000 mg/kg. To determine the effect of increasing soil Cu concentrations on phosphomonoesterase and urease activity following a simulated heat disturbance, aliquots of each of the Cu-treated soils were exposed to 60 °C for 24 h (perturbed group), and phosphomonoesterase and urease activity measured after 1, 2 and 7 days. Without heat disturbance, the Cu concentration causing significant inhibition of enzyme activity ranged from 50 to >1,000 mg/kg added Cu for phosphomonoesterase activity and 500 to > 1,000 mg/kg added Cu for urease activity. The Cu pre-exposure concentration increased the susceptibility of phosphomonoesterase activity but not urease activity to the heat disturbance. However, this did not follow a clear dose-response relationship and the effects were not lasting. The response differed according to soil type, with decreased resistance to heat found at concentrations ranging from 100 mg/kg added Cu in the silty loam soil to >1,000 mg/kg added Cu in the clay loam soil. The results from this study suggest that, at the concentrations of Cu typically reported in agricultural soils, Cu stress is unlikely to cause lasting alterations to the susceptibility of soil enzymes to a single moderate heat disturbance.
Keyword Copper
Enzyme activity
Functional stability
Heat
Resilience
Soil
Q-Index Code C1
Q-Index Status Confirmed Code
Institutional Status UQ

Document type: Journal Article
Sub-type: Article (original research)
Collections: School of Agriculture and Food Sciences
Official 2014 Collection
 
Versions
Version Filter Type
Citation counts: TR Web of Science Citation Count  Cited 1 times in Thomson Reuters Web of Science Article | Citations
Scopus Citation Count Cited 0 times in Scopus Article
Google Scholar Search Google Scholar
Created: Sun, 12 Jan 2014, 10:09:35 EST by System User on behalf of School of Agriculture and Food Sciences