HR: 12:05h
AN: B32B-08 INVITED     [Abstracts]
TI: Kinetics of conjugative gene transfer on surfaces in granular porous media
AU: * Ginn, T
EM: trginn@ucdavis.edu
AF: Civil & Environmental Engineering, UC Davis, Davis, CA 95616 United States
AU: Massoudieh, A
EM: amassoudieh@ucdavis.edu
AF: Civil & Environmental Engineering, UC Davis, Davis, CA 95616 United States
AU: Nelson, K
EM: knelson@ucdavis.edu
AF: Civil & Environmental Engineering, UC Davis, Davis, CA 95616 United States
AU: Mathew, A
EM: amathew@ucdavis.edu
AF: Civil & Environmental Engineering, UC Davis, Davis, CA 95616 United States
AU: Lambertini, E
EM: elambertini@ucdavis.edu
AF: Civil & Environmental Engineering, UC Davis, Davis, CA 95616 United States
AB: The transfer of genetic material among bacteria in the environment can occur both in the planktonic and attached state. Given the propensity of organisms to exist in sessile microbial communities in oligotrophic conditions, and that such conditions typify the subsurface, this study focuses on exploratory modeling of horizontal gene transfer among surface-associated E. coli in the subsurface. The mathematics so far used to describe the kinetics of conjugation in biofilms are developed largely from experimental observations of planktonic gene transfer, and are absent of lags or plasmid stability that appear experimentally. We develop a model for bacterial filtration and gene transfer in the attached state, for the early stages of biofilm formation using a recently revised filtration theory approach (Nelson and Ginn, 2005) with motility of E. coli described as a continuous time random walk according to data from microflow chamber experiments (Biondi et al., 2002).
DE: 0412 Biogeochemical kinetics and reaction modeling (0414, 0793, 1615, 4805, 4912)
DE: 0414 Biogeochemical cycles, processes, and modeling (0412, 0793, 1615, 4805, 4912)
DE: 1831 Groundwater quality
DE: 1832 Groundwater transport
DE: 4445 Nonlinear differential equations
SC: Biogeosciences [B]
MN: Fall Meeting 2005