Sulphur bacteria (above) practise a similar process, but split hydrogen sul; rather than water.

Sulphur bacteria may be present below the anoxic zone, reducing sulphate ions and liberating hydrogen sulphide.

Cyanobacteria still exist today, like the purple sulphur bacteria which glean hydrogen from hydrogen-sulphide to provide sulphur compounds as oxidation products.

In 1841 his study of sulphur bacteria (then the 'glairine of sulphurous waters') was noteworthy, as was his microscopic examination of drinking water.

Because a whole section of the pond was overshadowed by the forest, the bottom was choked with dead leaves covered with a purple scum due to sulphur bacteria, making its depths very dark and its vegetation restricted to algae and a few clumps of starwort.

Purple sulfur bacteria are found in the pink central layer.

The Chromatiaceae are the main family of purple sulfur bacteria.

Like all purple sulfur bacteria, they are capable of photosynthesis.

They are now classified with the purple sulfur bacteria.

Recently, another study has determined the organization of the bacteriochlorophyll molecules in green sulfur bacteria.

Chlorobium (also known as Chlorochromatium) is a genus of green sulfur bacteria.

Then came observations of coherence in antenna-protein chlorophylls from green sulfur bacteria.

Purple sulfur bacteria are included among the gamma subgroup, and make up the order Chromatiales.

Most species of Ectothiorhodospiraceae are also purple sulfur bacteria but they store the globules without their cells.

The electron transport chain of green sulfur bacteria uses the reaction centre bacteriochlorophyll pair, P840.

It belongs to the Purple sulfur bacteria.

To create the mutant, three genes were inactivated that green sulfur bacteria acquired late in their evolution.

These light-gathering membranes may even form enclosed structures called chlorosomes in green sulfur bacteria.

In the deep water, hydrothermal vents may occur where chemosynthetic sulfur bacteria form the base of the food web.

The lake contains a population of green sulfur bacteria that conducts photosynthesis with bacteriochlorophyll e.

This reaction occurs in the photosynthetic green and purple sulfur bacteria and some chemolithotrophs.

One exception is purple sulfur bacteria.

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

In some, called purple sulfur bacteria, it is either sulfide or elemental sulfur.

Cyanobacteria, green sulfur bacteria, and purple bacteria create energy by a process called photophosphorylation.

However, in green sulfur bacteria they are arranged in specialised antenna complexes called chlorosomes.

Green and purple sulfur bacteria are thought to have used hydrogen and sulfur as an electron donor.

Green sulfur bacteria appear in Lake Matano, Indonesia, at a depth of approximately 110-120 meters.

Purple bacteria and green sulfur bacteria occupy relatively minor ecological niches in the present day biosphere.

The energy in sunlight is captured by plants, cyanobacteria, purple bacteria, green sulfur bacteria and some protists.