Figure 4
From: Patterning of mutually interacting bacterial bodies: close contacts and airborne signals
F colony development in the presence of macula. a. F-colonies planted simultaneously with an F-macula (12 cm dish). Top: overall geometry and time-course (macula edge at the bottom, bar = 1 cm). Below: colony pattern distribution at day 7; filled dots - standard F colonies; open dots - imperfect F pattern (see inset; bar = 5 mm); grey zone: interval of colony diameter in controls (no macula). Note the critical distance of ca 18 mm indicating the breakdown of typical F structure. b. Effect of maculae of different origin (as indicated) on the development of F colonies. Left column: synchronous planting, common space. Middle and right: macula separated from colonies by a septum (arrow), but sharing the gas phase. Middle: synchronous planting. Right: colonies planted to 3d macula. Insets: controls without maculae. Day 5 after colony inoculation, bar = 1 cm. In settings without a septum containing R or E. coli macula, note development of X phenotype.