A study in a close relative, Burkholderia thailandensis (Bth), showed that a quorum sensing mutant had marked differences in colony morphology, but other genes involved in exopolysaccharide production could also be necessary for morphotype switching. (jcvi.org)
Here's one image from a field emission scanning electron microscope, showing what Hoover describes as features «interpreted as morphotypes of the cyanobacterium Calothrix spp.» (Journal of Cosmology): (dotearth.blogs.nytimes.com)
Similar observations were noted at the Health Protection Agency (HPA) in the UK, where different morphotypes were observed from lung samples in mice infected with Bps K96243. (jcvi.org)