4. Conclusions
This work applies optical microscopy under varying imaging modes
depending on the analyte species to visualise both metabolic activities
of silver ion reduction and superoxide radical generation of theD.r. colony. It is discovered that a distinct negative
correlation between the two biochemical processes surfaces yet only for
a minor subpopulation of the bacteria. Interestingly, this finding
directly supports the current view of the single polyvalent strategy
against various conditions lethal to most species for explaining the
polyextremophile nature of D.r. bacteria.