Pollution is one of the most serious environmental problems; it significantly changes the environmental conditions and profoundly influences the distribution of bacterial communities. Here, the influence of automobiles pollution on the community composition, diversity and evolution of bacteria in Rajkot (Gujarat, India) was investigated. Phylogenetic analysis of 16S rDNA genes showed that the majority of bacterial sequences undergo evolutionary changes in order to adapt in harsh conditions. Bacteria of same genus and species surviving in different areas (Polluted and non-polluted) showed differences in clade and phylogenic relationships for 16S rDNA gene sequences. The analysis of DNA polymorphisms in 16S rDNA sequences by DnaSP 5.10 software showed that the bacterial species undergo haplotype variations which leads to mutation in 16S rDNA gene at nucleotide level. These provided insights into the evolutionary forces acting on populations and species due to change in environmental condition by pollution.
Pollution, Bacteria, 16S rDNA, Haplotype variations
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