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Bacteria point inoculated onto the solid medium exert two-dimensional spreading growth on the surface. The colony morphologies are rich in diversity and depend on various biological and physico-chemical factors. Since it is easy to pursue the growth processes macro- and microscopically and to carry out experiments by controlling specific factors, precise experimental approaches to morphogenesis by living cells have now become possible. Several critical factors for self-similar morphogenesis were identified.
Matsuyama et al. (1993) studied this question.