TY - JOUR
T1 - Assessment upon species evolution of mixed consortia for azo dye decolorization
AU - Chen, Bor Yann
AU - Chang, Jo Shu
N1 - Funding Information:
The authors sincerely appreciate grant supports (NSC 90-2214-E-197-003, NSC 94-2214-E-197-003 and NSC 95-2221-E-197-005) from National Science Council in Taiwan, ROC for this research. The authors gratefully acknowledge Professor Tai-Lee Hu (Department of Environmental Engineering and Science, Feng Chia University, Taichung, Taiwan) for kindly suggesting valuable comments and providing the strains for the work. Without significant contributions (e.g., Nash's equilibrium theorem and von Neumann's minmax theorem) from the 1994 Nobel Laureate John Nash and Professor John von Neumann in game theory, or Professor Nasar for her impressive presentation ( Nasar, 1994 ), the idea of considering this DH5α/ P. luteola impasse might not have been stimulated ( Chen, 2007, in press ). Most of novel concepts were initiated while the prime author held a research associate awardship from National Research Council (NRC), USA under Henry Tabak's mentorship to work in National Risk Management Research Laboratory (NRMRL), US Environmental Protection Agency (EPA), Cincinnati, OH, USA. The authors also sincerely appreciate Lin, M.-Y. and Chen, S.-Y. (NCKU) for their experimental data analysis ( Chen et al ., 2003a, 2006 ). This work is also dedicated to the memory of Dolloff F. Bishop who passed away on 4 July 1999 when the prime author was on duty under his mentorship in US EPA.
PY - 2007
Y1 - 2007
N2 - This study provides a novel attempt to put forward, in De Wit's replacement experiments and game theory, interspecific competition in bioaugmentation using constructed mixed-consortia for species growth and biodecolorization. Previous studies stated that species interactions towards mutualism in mixed cultures were vital to determine optimal decolorization in bioaugmentation. In this study, using De Wit's indices trajectories of relative yields over time disclosed interspecific competition of the model binary-biosystems in various dye-free and dye-bearing cultures. In aerobic growth conditions, Escherichia coli DH5α owned a growth advantage to out-compete Pseudomonas luteola due to preferential growth rate of DH5α. However, in static-decolorization conditions DH5α surrendered proportion of its advantage to enhance color removal of P. luteola for total coexistence. Game theory also indicated that there were two Nash equilibria (i.e., total conflict and total cooperation situations) present in the model biosystems. In aerobic growth, DH5α had its growth advantage to exclude P. luteola for dominance (i.e., conflict strategy) according to competitive exclusion principle. In static-decolorization conditions, as the removal of a common dye threat was crucial to both species for survival, both species selected cooperation strategy through metabolite stimulation of DH5α to enhance effective decolorization of P. luteola for long-term sustainable management.
AB - This study provides a novel attempt to put forward, in De Wit's replacement experiments and game theory, interspecific competition in bioaugmentation using constructed mixed-consortia for species growth and biodecolorization. Previous studies stated that species interactions towards mutualism in mixed cultures were vital to determine optimal decolorization in bioaugmentation. In this study, using De Wit's indices trajectories of relative yields over time disclosed interspecific competition of the model binary-biosystems in various dye-free and dye-bearing cultures. In aerobic growth conditions, Escherichia coli DH5α owned a growth advantage to out-compete Pseudomonas luteola due to preferential growth rate of DH5α. However, in static-decolorization conditions DH5α surrendered proportion of its advantage to enhance color removal of P. luteola for total coexistence. Game theory also indicated that there were two Nash equilibria (i.e., total conflict and total cooperation situations) present in the model biosystems. In aerobic growth, DH5α had its growth advantage to exclude P. luteola for dominance (i.e., conflict strategy) according to competitive exclusion principle. In static-decolorization conditions, as the removal of a common dye threat was crucial to both species for survival, both species selected cooperation strategy through metabolite stimulation of DH5α to enhance effective decolorization of P. luteola for long-term sustainable management.
UR - http://www.scopus.com/inward/record.url?scp=39149131386&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=39149131386&partnerID=8YFLogxK
U2 - 10.1016/j.jcice.2007.04.002
DO - 10.1016/j.jcice.2007.04.002
M3 - Article
AN - SCOPUS:39149131386
SN - 0368-1653
VL - 38
SP - 259
EP - 266
JO - Journal of the Chinese Institute of Chemical Engineers
JF - Journal of the Chinese Institute of Chemical Engineers
IS - 3-4
ER -