Some photoautotrophic microorganisms can, under certain conditions, produce hydrogen.

Thus, the total photoautotrophic primary production for the Earth is about 104.9 billion tonnes C/yr.

Chromatium is a genus of photoautotrophic Gram-negative bacteria which are found in water.

Photoautotrophic organisms are sometimes referred to as holophytic.

Moss is a very frugal photoautotrophic organism that has been kept in vitro for research purposes since the beginning of the 20th century.

The term phytoplankton encompasses all photoautotrophic microorganisms in aquatic food webs.

Some algae can grow faster under mixotrophic conditions rather than under photoautotrophic conditions.

The green sulfur bacteria are a family of obligately anaerobic photoautotrophic bacteria.

In both groups of organisms the plastids originate from engulfed photoautotrophic eukaryotes.

They also provide shade and, although frequently confused with them, can reduce certain light-generated growths of photoautotrophic algae.

Plants are generally photoautotrophic.

Chloroflexus aurantiacus is thought to grow photoheterotrophically in nature, but it has the capability of fixing inorganic carbon through photoautotrophic growth.

Its best growth conditions are anaerobic phototrophy (photoheterotrophic and photoautotrophic) and aerobic chemoheterotrophy in the absence of light.

It contains only 7 genera of obligately anaerobic photoautotrophic bacteria, known colloquially as Green sulfur bacteria.

Such mixotrophic organisms may dominate their habitat, due to their capability to use more resources than either photoautotrophic or organoheterotrophic organisms.

For example most cyanobacteria are photoautotrophic, since they use light as an energy source, water as electron donor, and CO as a carbon source.

For example, purple sulfur bacteria and cyanobacteria are generally photoautotrophic where as purple non-sulfur bacteria are photoorganotrophic.

While the photoautotrophic algal partner generates metabolic energy through photosynthesis, the fungus offers a stable, supportive matrix and protects cells from radiation and dehydration.

Photoautotrophic organisms, such as algae and vascular plants, can exhibit a very wide range of physiological plasticity in elemental composition and thus have relatively weak stoichiometric homeostasis.

Organic carbon, however, has δC values that range from 20 per mil for photoautotrophic bacteria to 60 per mil for microbial communities that recycle methane.

Although purple non-sulfur bacteria are normally photoheterotrophic, R. palustris has the ability to switch between the four different modes of metabolism that support life: photoautotrophic, photo heterotrophic, chemoautotroph and chemoheterotrophic.

Many fossils are obviously autochthonous, such as rooted fossils like crinoids, and many fossils are intrisically obviously allocthonous, such as the presence of photoautotrophic plankton in a benthic deposit that must have sunk to be deposited.

Using satellite-derived estimates of the Normalized Difference Vegetation Index (NDVI) for terrestrial habitats and sea-surface chlorophyll for the oceans, it is estimated that the total (photoautotrophic) primary production for the Earth was 104.9 Gt C yr.

Research developed in this field encompasses design and assembly of devices (and their components) for the direct production of solar fuels, photoelectrochemistry and its application in fuel cells, and engineering of enzymes and photoautotrophic microorganisms for microbial biofuel and biohydrogen production from sunlight.