Abstract:
:This article deals with toxicological study of cadmium (Cd) as CdCl(2) on the growth and cell morphology of Escherichia coli K-12 MG1655. The minimum inhibitory concentration of Cd was 15μM. When cadmium was added at mid-log phase, growth was completely inhibited at 0.6mM and 50% of the bacterial growth retardation was found at 0.3mM concentration. At sublethal dose of Cd (0.2mM), majority of the cells showed filamentous form, suggested the possible effect of Cd on cell division. AFM study of bacterial cell morphology revealed severe surface damage of the treated cells in comparison to untreated cells. The expression of FtsZ decreased both at transcriptional and translational levels with the time of Cd exposure, thus cell division was affected and as a result cells took filamentous form. Due to Cd exposure, the nucleoid segregation remained unaffected, but improper Z-ring formation was observed. Activities of peroxidase and superoxide dismutase significantly decreased in treated cells with exposure time, which might elevate intracellular ROS level, as a consequence metabolic dysfunction and toxic effect were resulted.
journal_name
Ecotoxicol Environ Safjournal_title
Ecotoxicology and environmental safetyauthors
Hossain ST,Mallick I,Mukherjee SKdoi
10.1016/j.ecoenv.2012.09.017subject
Has Abstractpub_date
2012-12-01 00:00:00pages
54-9eissn
0147-6513issn
1090-2414pii
S0147-6513(12)00331-4journal_volume
86pub_type
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