Journal
APPLIED AND ENVIRONMENTAL MICROBIOLOGY
Volume 68, Issue 2, Pages 968-972Publisher
AMER SOC MICROBIOLOGY
DOI: 10.1128/AEM.68.2.968-972.2002
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Funding
- NIGMS NIH HHS [R01 GM056665, GM 56665] Funding Source: Medline
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Ralstonia eutropha JMP134(pJP4) and several other species of motile bacteria can degrade the herbicide 2,4-dichlorophenoxyacetate (2,4-D), but it was not known if bacteria could sense and swim towards 2,4-D by the process of chemotaxis. Wild-type R. eutropha cells were chemotactically attracted to 2,4-D in swarm plate assays and qualitative capillary assays. The chemotactic response was induced by growth with 2,4-D and depended on the presence of the catabolic plasmid pJP4, which harbors the tfd genes for 2,4-D degradation. The tfd cluster also encodes a permease for 2,4-D named TfdK. A tfdK mutant was not chemotactic to 2,4-D, even though it grew at wild-type rates on 2,4-D.
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