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. 2014 Aug 28;9(8):e105901. doi: 10.1371/journal.pone.0105901

Figure 6. Model of biofilm formation in S. fredii SMH12.

Figure 6

A. In soil. B. In rizosphere. S. fredii SMH12 forms monolayer-type biofilm when colonize soil surfaces. When the bacterium colonizes the legume root (in presence of inducing flavonoids), it forms microcolony-type biofilm, which is necessary for a successful root colonization and symbiosis between rhizobia and legume.