Rhizosphere biogeochemistry

April, R., Keller, D., 1990. Mineralogy of the rhizosphere in forest soils of the Eastern United-States— Mineralogic smdies of the rhizosphere. Biogeochemistry 9, 1-18. 

Darrah, P.R., Roose, T., 2001. Modeling the Rhizosphere. In Pinton, R., Varaiuiu, Z., Naniupieri, P., (Eds.), The Rhizosphere. Biogeochemistry and Organic Substances at the Sod-Plant Interface. Marcel Dekker, New York, pp. 327-372. 

Courchesne F., Seguin V., Dufresne A. Solid phase speciation of metals in the rhizosphere of forest and industrial soils. Proceedings of the 5th International Conference on Biogeochemistry of Trace Elements, 1999, Austria. 

Fenn L.B., Assadian N. Can rhizosphere chemical changes enhance heavy metal absorptuin by plants growing in calcareous soil Proceedings of the 5th International Conference on the Biogeochemistry of Trace Elements 1999 Julyll-July... 

Hinsinger P. Bioavailability of trace element as related to root-induced chemical changes in the rhizosphere. Proceeding of 5th International Conference on the Biogeochemistry of Trace elements, Vienna, Austria, 1999. 

Dannenberg S. and Conrad R. (1999) Effect of rice plants on methane production and rhizospheric metabolism in paddy soil. Biogeochemistry 45, 53-71. 

Weiss J. V., Emerson D. E., Backer S. M., and Megonigal J. P. (2(X)3) Enumeration of Fe(II)-oxidizing and Fe(III)-reducing bacteria in the root zone of wetland plants implications for a rhizosphere iron cycle. Biogeochemistry 64, 77-96. 

Although the present chapter focused on the direct role of plant roots, it has to be home in mind that rhizosphere microorganisms are key players in the biogeochemistry of trace elements in the rhizosphere. These organisms are addressed in Chapters 2 and 9. However, another of our challenges for the future will be to develop a more holistic approach to studying rhizospheric interactions by... 

Cherrey, A., Chaignon, V., and Hinsinger, P. (1999). Bioavailability of copper in the rhizosphere of rape and ryegrass cropped in vineyard soils. In Proc. 5th International Conference on the Biogeochemistry of Trace Elements, ed. Wenzel, W. W., Adriano, D. C., Alloway, B., Doner, H. E., Keller, C., Lepp, N. W., Mench, M., Naidu, R., and Pierzynski, G. M., International Society for Trace Element Research, Vienna, Austria, 196-197. 

Biogeochemistry of Trace Elements in the Rhizosphere PM. Huang and G.R. Gobran (Editors)... 

Gobran, G.R., Clegg, S., Courchesne, F, 1998. Rhizospheric processes influencing the of forest ecosystems. In Breemen, N. van (Ed.), Plant Induced Soil Changes Processes and Feedbacks. Biogeochemistry 42, 107-120. 

Seguin, V., Courchesne, R, Gagnon, C., Martin, R.R., Naftel, S., Skinner, W., 2005. Mineral weathering in the rhizosphere of forested soils. In Huang, P.M., Gobran, G.R. (Eds.), Biogeochemistry of Trace Elements in the Rhizosphere. Elsevier, New York, pp. 29-55 (in this book). 

April, R., Keller, D., 1990a. Interactions between minerals and roots in forest soils. In Farmer, V.C., Tardy, Y. (Eds.), Rroceedings of Ninth International Clay Conference, Sci. Geol. Mem., pp. 85-89. April, R., Keller, D., 1990b. Mineralogy of the rhizosphere in forest soils of the eastern United States. Biogeochemistry 9, 1-12. 

It is advantageous to combine theroretical (thermodynamic) calculations, sequential extraction schemes, and spectroscopies (e.g., synchrotron-based methods, e.g. EXAFS and XANES) to advance our understanding of Cd speciation in the rhizosphere which is bathed in root exudates and microbial metabohtes. This information is fundamental in order to advance the frontiers of knowledge on the biogeochemistry of soil Cd at the molecular level. 

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