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Published online 5 April 2007
Published in J Environ Qual 36:638-645 (2007)
DOI: 10.2134/jeq2005.0438
© 2007 American Society of Agronomy, Crop Science Society of America, and Soil Science Society of America
677 S. Segoe Rd., Madison, WI 53711 USA
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Soil Microbial Community Response to Hexavalent Chromium in Planted and Unplanted Soil

Ioannis Ipsilantis and Mark S. Coyne*

Dep. of Plant and Soil Sciences, Univ. of Kentucky, Agricultural Science Building, Lexington, KY 40546-0091 USA


Figure 1
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  		Fig. 1. Thymidine incorporation in a range of Cr concentrations of extracts of bulk soil, bulk soil treated with Cr, rhizosphere, and rhizosphere soil treated with Cr, expressed as percent of the control-tolerance indicator (error bars represent standard error, n = 3). The line at 50% incorporation relative to the control is to assist in visualizing IC50.

 

Figure 2
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  		Fig. 2. Average well color development (AWCD) in BIOLOG plates for Cr-amended and unamended bulk and rhizosphere soil (error bars represent standard error, n = 3). Symbols: open circles ({circ}), rhizosphere, closed circles (•), rhizosphere + Cr, open triangles ({triangleup}), bulk soil, closed triangles ({blacktriangleup}), bulk soil + Cr.

 

Figure 3
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  		Fig. 3. Principal component analysis of BIOLOG plates data. Each point represents one replicate. Symbols: open circles ({circ}), rhizosphere, closed circles (•), rhizosphere + Cr, open triangles ({triangleup}), bulk soil, closed triangles ({blacktriangleup}), bulk soil + Cr. Values in parentheses show the variation explained by the principal component.

 




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The SCI Journals Agronomy Journal Crop Science
Journal of Natural Resources
and Life Sciences Education		 Vadose Zone Journal
Soil Science Society of America Journal Journal of Plant Registrations The Plant Genome
Copyright © 2007 by the American Society of Agronomy, Crop Science Society of America, and Soil Science Society of America.