Fate of genetically modified microorganisms in the corn rhizosphere |
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| Authors: | Jean Louis Morel Gabriel Bitton Dr G Rasul Chaudhry Judy Awong |
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| Institution: | (1) Department of Agronomy, National Superior School of Agronomy and Nutritional Industries, Vandoeuvre Les Nancy, France;(2) Department of Environmental Engineering Sciences, University of Florida, Gainesville, Florida, USA;(3) Department of Soil Science, University of Florida, 32611 Gainesville, Florida, USA |
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| Abstract: | The fates of genetically modified (GM)Escherichia coli andPseudomonas putida in the corn rhizosphere were investigated. Under hydrophonic and sterile conditions, both bacteria grew well in the presence of root exudates used as a sole carbon source. The growth patterns of wild types and genetically modified strains ofE. coli andP. putida were similar under the conditions tested.The presence of rhizospheric microorganisms affected the survival pattern ofE. coli. In the presence of corn roots and rhizospheric microorganisms,E. coli numbers increased during the first 3 days but were later drastically reduced, probably as a result of competition with rhizospheric microorganisms for the carbon source. However, in the presence of rhizospheric microorganisms,P. putida survived better thanE. coli in the simulated corn rhizosphere. |
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