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Scientific Study from the year 2013 in the subject Biology - Micro-
and Molecular Biology, grade: A, Nirma University (Institute of
Science), language: English, comment: This study focused on
detection of catechol metabolizing enzyme(s) in halotolerant
bacteria isolated from saline soil., abstract: Hydrocarbon
contamination of marine ecosystems has been a major environmental
concern. Hydrocarbon metabolizing capacity of four halotolerant
bacteria (Bacillus atrophaeus, Halomonas shengliensis, Halomonas
koreensis, and Virgibacillus salarius) isolated from saline soil of
Khambhat, India was investigated. Presence of catechol metabolizing
enzymes (catechol 2,3 dioxygenase, chlorocatechol 1,2 dioxygenase,
and protocatechuate 3,4 dioxygenase) was checked in V. salarius, as
only this among all the test organisms could grow on the
hydrocarbon substrates used, and compared with Pseudomonas
oleovorans. Effect of salinity of the growth medium on activity of
catechol metabolizing enzymes was also studied. Catechol 2,3
dioxygenase activity in both the organisms was more susceptible to
increase in salinity of the growth medium than chlorocatechol
1,2-dioxygenase activity. To the best of our awareness, this is the
first report of catechol metabolism in V. salarius. V. salarius was
found to be capable of weak biofilm formation. As V. salarius is
capable of growing at high salt concentration, alkaline pH,
hydrocarbon degradation, and also of growth in presence of various
metal ions, it can be an attractive candidate for bioremediation of
marine oil spills. Organisms like V. salarius can also serve as a
model for multiple stress tolerance in prokaryotes.
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