Conclusions
In this review, we have examined mechanisms and possible
advantages of rod-shape formation. Consideration of
organisms across kingdoms reveals differences and similarities
in mechanisms for generating rod-like shapes, and
also highlights common advantages that may have driven
the convergent evolution of this fundamental shape. We
have focused primarily on E. coli and S. pombe as well characterized
examples, but it is likely that studies of other
rods will reveal a diverse spectrum of mechanisms of
determining cell shape. This review perhaps poses
more questions than answers, and sets the stage for future
investigations by highlighting, for instance, the
question of possible benefits of a given shape in a particular
environment.