Distribution of Aerobic Bacteria Which Contain Bacteriochlorophyll
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Shiba, Tsuneo; Simidu, Usio; Taga, Nobuo

doi:10.1128/aem.38.1.43-45.1979

Cited by 147 publications

(55 citation statements)

References 2 publications

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“…Indeed, in most species of anaerobic anoxygenic photosynthetic bacteria (AnAnP), the synthesis of photosynthetic apparatus is highly repressed by oxygen and modulated by light intensity (Bowman et al ., 1999). However, since 1979, when the first member of aerobic anoxygenic photosynthetic bacteria (AAnP) has been reported (Shiba et al ., 1979), many AAnP representatives were described from a wide variety of marine, freshwater and terrestrial habitats (Yurkov and Beatty, 1998). These bacteria grow photoheterotrophically, using light as an additional source of energy, and require oxygen for both growth and synthesis of their photosynthetic apparatus.…”

Section: Discussionmentioning

confidence: 99%

Putative novel photosynthetic reaction centre organizations in marine aerobic anoxygenic photosynthetic bacteria: insights from metagenomics and environmental genomics

Yutin

Béjà

2005

Environmental Microbiology

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Photosynthetic core complexes of anoxygenic bacteria consist of reaction centres (RCs) surrounded by light-harvesting complexes (LHC). The structural proteins of the RC-LHC1 complex are encoded by the puf-operon. We find diverse operon organizations of puf-operons that reflect structural differences of the core complex in marine aerobic anoxygenic photosynthetic bacteria (AAnP). By analysis of environmental DNA records coming from AAnP bacteria we find several unknown proteins downstream to the pufM, which were assigned as novel PufX proteins. As all known pufX genes belong to Rhodobacter strains which carry out anaerobic photosynthesis, this may be the first observation of a PufX-containing RCs in aerobic anoxygenic photosynthetic bacteria. Phylogenetic analyses of PufM proteins from cultured as well as from uncultured bacteria show that PufM from operons containing putative novel pufX genes are grouped with Rhodobacter and not with Roseobacter strains.

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Section: Discussionmentioning

confidence: 99%

Putative novel photosynthetic reaction centre organizations in marine aerobic anoxygenic photosynthetic bacteria: insights from metagenomics and environmental genomics

Yutin

Béjà

2005

Environmental Microbiology

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“…Aerobic anoxygenic phototrophs (AAPs) are bacteria that carry out anoxygenic photosynthesis under oxic conditions. AAPs are not autotrophic and appear to use light energy as an additional, but never as their sole energy source (Shiba et al, 1979;Harashima et al, 1987). They form photopigments under suitable conditions only (Yurkov and Beatty, 1998;Kolber et al, 2001).…”

Section: Introductionmentioning

confidence: 99%

Influence of light and anoxia on chemiosmotic energy conservation in Dinoroseobacter shibae

Holert

Hahnke

Cypionka³

2011

Environ Microbiol Rep

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In the present study we have investigated the influence of light and anoxia on the energetic state of the aerobic anoxygenic phototroph (AAP) Dinoroseobacter shibae. Respiration, chemiosmotic proton translocation and the adenylate energy charge (AEC) of the cells were measured comparing light versus dark and oxic versus anoxic conditions. Light caused a decrease of the respiration rates of washed cells. This might be a substitution rather than a direct inhibitory effect, because both photosynthesis and respiration contribute to the proton-motive force. As known from other AAPs, light alone did not induce proton translocation if applied to anoxic cell suspensions. However, additions of small oxygen pulses to anoxic cell suspensions caused two times more proton translocation in the light than in the dark. The AEC of the cells was measured by means of a modified luciferin-luciferase method. Growing cells of D. shibae kept an AEC of 0.93, indicating that the adenylate pool was highly phosphorylated. After harvesting and storing the cells under anoxic conditions for 2 h, the AEC dropped to 0.12. However, the cells remained reactive. Upon addition of oxygen, the AEC increased to its original value within 40 s by the formation of about 12 mM of intracellular ATP. There were no differences whether this recovery experiment was carried out in the dark or in the light. We conclude that D. shibae is able to change its energetic state not only in response to the light regime but also during oxic–anoxic transitions. Both responses appear suited to save in situ organic substrates and endogenous electron donors, thus enhancing the role of photosynthetic energy conservation.

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“…In the late 1970s, an unusual kind of bacteria was discovered in Tokyo Bay, Japan (Harashima et al, 1978;Shiba et al, 1979). The isolates contained small amounts of bacteriochlorophyll a (BChl a), but in contrast to their close relatives, purple non-sulphur photosynthetic bacteria, they were obligate aerobes requiring oxygen for respiration and growth (Yurkov and Beatty, 1998).…”

Section: Introductionmentioning

confidence: 99%

Distribution of aerobic anoxygenic phototrophs in temperate freshwater systems

Mašı́n

Nedoma

Pechar³

et al. 2008

Environmental Microbiology

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The presence of aerobic anoxygenic phototrophs (AAPs) was recently reported from various marine environments; however, there is little information regarding their distribution in fresh waters. We surveyed a number of freshwater systems in central Europe, by infra-red fluorometry, infra-red epifluorescence microscopy, fluorescence emission spectroscopy and pigment analyses. AAPs were found to be abundant in several oligotrophic and mesotrophic lakes (50-400 ng of bacteriochlorophyll a l(-1), 10-80% of bacterial biomass), while in more eutrophized water bodies they represented a negligible part of the total microbial community (< 1%). The observed freshwater AAPs were morphologically diverse and different from previously observed marine species. Under temperate European climatic conditions, AAP populations undergo strong seasonal changes in terms of both abundance and species composition, with the maximum biomass in summer and the minimum in winter. In the mountain lakes Certovo and Plesné, AAPs contributed more than one half of total bacterial biomass during their summer maximum. These results show that photoheterotrophic bacteria represent an important part of the microbial community in many freshwater systems.

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Distribution of Aerobic Bacteria Which Contain Bacteriochlorophyll a

Cited by 147 publications

References 2 publications

Putative novel photosynthetic reaction centre organizations in marine aerobic anoxygenic photosynthetic bacteria: insights from metagenomics and environmental genomics

Putative novel photosynthetic reaction centre organizations in marine aerobic anoxygenic photosynthetic bacteria: insights from metagenomics and environmental genomics

Influence of light and anoxia on chemiosmotic energy conservation in Dinoroseobacter shibae

Distribution of aerobic anoxygenic phototrophs in temperate freshwater systems

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