Bacterial sex (transformation)
Stress induces sex in bacteria
Bacterial sex (transformation) also appears to be an adaptation to stress. For instance, transformation occurs near the end of logarithmic growth, when amino acids
become limiting in Bacillus subtilis, or in Haemophilus influenzae when
cells are grown to the end of logarithmic phase. In Streptococcus
mutans and other streptococci, transformation is associated with high
cell density and biofilm formation. In Streptococcus pneumoniae,
transformation is induced by the DNA damaging agent mitomycin C. These, and other, examples indicate that bacterial transformation, like eukaryote meiosis in protists,
is an adaptation to stressful conditions. This observation suggests
that the natural selection pressures maintaining meiosis in protists are
similar to the selective pressures maintaining bacterial
transformation. This similarity further indicates continuity, rather
than a gap, in the evolution of sex from bacteria to eukaryotes.
Bacterial sex (transformation) also appears to be an adaptation to stress. For instance, transformation occurs near the end of logarithmic growth, when amino acids
become limiting in Bacillus subtilis, or in Haemophilus influenzae when
cells are grown to the end of logarithmic phase. In Streptococcus
mutans and other streptococci, transformation is associated with high
cell density and biofilm formation. In Streptococcus pneumoniae,
transformation is induced by the DNA damaging agent mitomycin C. These, and other, examples indicate that bacterial transformation, like eukaryote meiosis in protists,
is an adaptation to stressful conditions. This observation suggests
that the natural selection pressures maintaining meiosis in protists are
similar to the selective pressures maintaining bacterial
transformation. This similarity further indicates continuity, rather
than a gap, in the evolution of sex from bacteria to eukaryotes.
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