Sulphide-dependent anoxygenic photosynthesis in the cyanobacterium Oscillatoria limnetica

Cohen, Yehuda; Jørgensen, Bo Barker; Padan, Etana; Shilo, Moshe

doi:10.1038/257489a0

Cited by 212 publications

(149 citation statements)

References 6 publications

Supporting

Mentioning

146

Contrasting

Unclassified

Order By: Relevance

“…Barbara Javor kindly provided samples of Oscillatoria terebriformis OH-80-Ot-D grown to stationary phase at 45° in D medium (Castenholz, 1981) Yehuda Cohen generously furnished samples of Oscillatoria limnetica (Solar Lake, Sinai) cultured 7 days at 40° in CHU 11 medium (Cohen, et al, 1975). He also provided Oscillatoria sp.…”

Section: Methodsmentioning

confidence: 99%

The evolution of glutathione metabolism in phototrophic microorganisms

1987

View full text Add to dashboard Cite

Section: Methodsmentioning

confidence: 99%

The evolution of glutathione metabolism in phototrophic microorganisms

1987

View full text Add to dashboard Cite

“…This is a complete reversal of the usual situation in a stratified lake, where oxygenic phototrophs normally occur in the aerobic surface layer. Cohen accordingly suspected that the cyanobacteria in this particular ecosystem might be engaged in anoxygenic photosynthesis, a hypothesis confirmed by isolating the predominant species, Oscillatorian limnetica, and studying its physiological properties (8). Like all other cyanobacteria, this organism can develop as an oxygenic photoautotroph.…”

Section: Facultative Anoxygenic Photosynthesismentioning

confidence: 99%

The position of cyanobacteria in the world of phototrophs

Stanier

1977

Carlsberg Res. Commun.

View full text Add to dashboard Cite

Recent advances in our knowledge of the biological properties of the cyanobacteria (former ,blue-green algae,) are reviewed. The subjects discussed include: cyanobacterial cell structure and development; comparative aspects of photosyntetic structure and function in prokaryotes; carbon metabolism and its relation to obligate photoautotrophy; and special properties of cyanobacteria that are of ecological significance (temperature relationships, nitrogen fixation and facultative anoxygenic photosynthesis).

show abstract

“…The photosynthetic apparatus of the cyanobacteria ("blue-green algae") resembles that of eukaryotic algae and higher plants; it includes two photosystems, both utilizing water as the electron donor with the evolution of oxygen. Nevertheless, a number of cyanobacteria have been recently found which, in addition, display bacterial-type anoxygenic photosynthesis, driven by photosystem I with sulfide as the electron donor (1,2 (3).…”

mentioning

confidence: 99%

Quantum yields for oxygenic and anoxygenic photosynthesis in the cyanobacterium Oscillatoria limnetica

Oren

Padan

Avron

1977

Proc. Natl. Acad. Sci. U.S.A.

Self Cite

View full text Add to dashboard Cite

A comparison of the quantum yield spectra of the oxygenic (H20 as the electron donor) with the anoxygenic (H2S as the electron donor) photosynthesis of the cyanobacterium, Oscillatoria limnetica reveals that anoxygenic photosynthesis is driven by photosystem I only. The highest quantum yields of the latter (maximum; 0.059 CO2 molecules/quantum of absorbed light) were obtained with wavelengths which preferentially excite photosystem I (<550, >650) in which chlorophyll a and-carotenoids are the major pigments. The addition of 3(3,4-dichlorophenyl)1,1-dimethylurea had no effect on anoxygenic photosynthesis, and no enhancement in quantum efficiency was observed by a superimposition of light preferentially exciting photosystem II.Oxygenic photosynthesis efficiently utilizes only a narrow range of the absorption spectrum (550-650 nm) where light is provided in excess to photosystem II via-phycocyanin. The quantum yield (0.033 CO2 molecules/quantum of absorbed light) is lower than the theoretical yield by a factor of 3, possibly due to inefficient light transfer from photosystem II to L. Thus, 3-fold enhancement of oxygenic photosynthesis by superimposition of photosystem I light, andlow quantum yields for anoxygenic photosynthesis, were obtained in this region. These results are consonant with the suggestion that such a cyanobacterium represents an intermediate stage in phototrophic evolution. The photosynthetic apparatus of the cyanobacteria ("blue-green algae") resembles that of eukaryotic algae and higher plants; it includes two photosystems, both utilizing water as the electron donor with the evolution of oxygen. Nevertheless, a number of cyanobacteria have been recently found which, in addition, display bacterial-type anoxygenic photosynthesis, driven by photosystem I with sulfide as the electron donor (1, 2). Thus, when the electron flow between photosystems II and I is inhibited by 3-(3,4-dichlorophenyl)-1,1-dimethylurea (Cl2Ph2Me2U), or when only photosystem I is excited by illumination with 703-nm light, anoxygenic photosynthesis proceeds with sulfide as the electron donor. Furthermore, two strains, Oscillatoria limnetica and Aphanothece halophytica have been shown to readily shift from aerobic growth with oxygenic photosynthesis to anaerobic growth and anoxygenic photosynthesis. In the anoxygenic photosynthesis of these strains, two sulfide molecules are oxidized to elemental sulfur for each CO2 molecule photoassimilated. The sulfur is then excreted from the cells (3).The ancient age since cyanobacteria appeared on earth (4) as well as a combination of prokaryotic cellular organization and oxygenic photosynthesis, underly the suggestion that cyanobacteria represent a primitive group of organisms from which the oxygenic plant-type photosynthesis evolved (5). The fact that various cyanobacteria (1, 2) display both anoxygenic and oxygenic photosynthesis and can readily shift from one to the other, points to the possibility that this faculty represents the missing link between bacterial type and plant t...

show abstract

Sulphide-dependent anoxygenic photosynthesis in the cyanobacterium Oscillatoria limnetica

Cited by 212 publications

References 6 publications

The evolution of glutathione metabolism in phototrophic microorganisms

The evolution of glutathione metabolism in phototrophic microorganisms

The position of cyanobacteria in the world of phototrophs

Quantum yields for oxygenic and anoxygenic photosynthesis in the cyanobacterium Oscillatoria limnetica

Contact Info

Product

Resources

About