Fig. 2
From: Surface topology affects wetting behavior of Bacillus subtilis biofilms

The surface topology of B. subtilis NCIB 3610 biofilms depends on the biofilm growth medium. When analyzed by light profilometry, B. subtilis NCIB 3610 biofilms show differences in their height features (a). Similar differences can also be observed in SEM images (b). Furthermore, for biofilms grown on MSgg, the topology in the center and the periphery of the colonies seems to be different