Bacteria .... Believe it .... Not
By Harold Eddleman, Ph. D.
Stranger than fiction; facts about bacteria.
44 million year old spores brought back to life
Written by Harold Eddleman, Ph. D., President, Indiana Biolab, 14045
Huff St., Palmyra IN 47164
Suggestions, corrections, and comments are
appreciated: Contact Harold Eddleman (email@example.com).
Austin, B., Conzalez, C.J., Strobie, M., Curry, J.J. and McLoughlin,
M.F. (1992). Recovery of Janthinobacterium lividum from diseases rainbow
trout, (Oncorhynchus mykiss (Walbaum) in Northern Ireland and Scotland.
Journal of Fish Diseases, 15, 357- 359.
This URL traces airborne organisms and mentions Janthinobacteria to trace
birds in this paper:
WYNN- WILLIAMS, D.D., 1983. Distribution and characteristics of Chromobacterium
in the maritime and sub- Antarctic. Polar Biology 2:101- 108. This paper
has a selective medium for Janthinobacterium lividium.
Hess, T.F., S.K Schmidt, J Silverstein, and B Howe. 1990.
Supplemental substrate enhancement of 2, 4- dinitrophenol mineralization
by a bacterial consortium. Applied and Environmental Microbiology. 56(6):1551–1558.
Key words: bacteria, microorganism, biodegradation A Janthinobacterium
sp. and an actinomycete, both capable of mineralizing 2,4-dinitrophenol
(DNP), were used to construct a consortium to mineralize DNP in nonaxenic
bench-scale sequencing batch reactors (SBRs). Average Km values for DNP
mineralization by pure cultures of the Janthinobacterium sp. and the actinomycete
were 0.01 and 0.13 .mu.g/ml, respectively, and the average maximum specific
growth rate (.mu.max) values for them were 0.06 and 0.23/h, respectively.
In the presence of NH4Cl, nitrite accumulation in pure culture experiments
and in the SBRs was stoichiometric to initial DNP concentration and the
addition of nitrogen enhanced DNP mineralization in the SBRs. Mineralization
of 10 .mu.g of DNP per ml was further enhanced in SBRs by the addition
of glucose at concentrations of 100 and 500 .mu.g/ml but not at 10 .mu.g/ml.
Possible mechanisms for this enhanced DNP mineralization in SBRs were suggested
by kinetic analyses and biomass measurements. Average .mu.max values for
DNP mineralization in the presence of 0, 10, 100, and 500 .mu.g of glucose
per ml were 0.33, 0.13, 0.42, and 0.59/h, respectively. In addition, there
was greater standing biomass in reactors amended with glucose. At steady-state
operation, all SBRs contained heterogenous microbial communities by only
one organism, an actinomycete, that was capable of mineralizing DNP. This
research demonstrates the usefulness of supplemental substrates for enhancing
the degradation of toxic chemicals in bioreactors that contain heterogeneous
http://www.cedarcrest.edu/academic/bio/hale/freshMres.html This page
has a long, long list of student projects most of them related to isolation
of Janthinobacterium from streams and study of its plasmids and genetics.