Colony morphogenesis regulates sporulation dynamics in bacterial biofilms.

Colony expansion in Bacillus subtilis biofilms influences sporulation timing, with faster spreading increasing separation between growth and spore development zones.

• Why it matters: Understanding how collective bacterial behaviors regulate differentiation processes like sporulation is crucial for insights into biofilm resilience and development, yet the mechanisms linking expansion and sporulation remain unclear.
• What they did: The study combined experiments with mutants and mathematical modeling to analyze how biofilm expansion affects spore formation, revealing that growth patterns shape sporulation distribution.
• The result: Faster biofilm spreading enhances the spatial separation of growth and sporulation, indicating that colony morphogenesis actively organizes cellular differentiation within biofilms.