Nonproteobacteria Gram-Negative Bacteria

The cyanobacteria, also known as blue-green bacteria, are a phylum of bacteria that obtain their energy through photosynthesis.

Some groups of bacteria can capture light energy and convert it to ATP without the production of oxygen through anoxygenic photosynthesis.

Picoplankton is the fraction of plankton which can be photosynthetic or heterotrophic.