FIG. 2.

In situ hybridizations using typical S1 granule sections. (a) Archaea (red) and Bacteria (green); (b) simultaneous Crenarchaeota (red) and Methanosaeta (green) probing; (c) Crenarchaeota cluster (red) surrounded by filamentous Methanosaeta cells (green); (d) Crenarchaeota clusters located at the granule edge and around granule channels and cavities; (e) rod-shaped Crenarchaeota cells at granule periphery; (f) microbeta image illustrating localized uptake of acetate at the surface of an S1 granule at 15°C after 8 h.