INVESTIGADORES
STUDDERT Claudia Alicia
artículos
Título:
A strain isolated from gas oil-contaminated soil displays chemotaxis towards gas oil and hexa
Autor/es:
LANFRANCONI MP, ALVAREZ HM AND STUDDERT CA
Revista:
ENVIRONMENTAL MICROBIOLOGY
Referencias:
Año: 2003 vol. 5 p. 1002 - 1008
ISSN:
1462-2912
Resumen:
In this report we describe the isolation of a strain from
soil contaminated with gas oil by taking bacteria from
a chemotactic ring on gas oil-containing soft agar
plates. Partial 16 S rDNA sequencing of the isolated
strain showed 99.1% identity with
Flavimonas oryzihabitans
. It was not only able to degrade different
aliphatic hydrocarbons but it was also chemotactic
towards gas oil and hexadecane, as demonstrated by
the use of three different chemotaxis methods, such
as agarose plug and capillary assays and swarm plate
analysis. In addition, the strain was chemotactic to a
variety of carbon sources that serve as growth substrates,
including glucose, arabinose, mannitol, glycerol,
gluconate, acetate, succinate, citrate, malate,
lactate and casaminoacids. This is the first report on
chemotaxis of a hydrocarbon-degrading bacterium
towards a pure alkane, such as hexadecane.
The fact that environmental isolates show chemotaxis
towards contaminant/s present in the site of isolation
suggests that chemotaxis might enhance
biodegradation by favouring contact between the
degrading microorganism and its substrate.