Contribution of Aerobic Photoheterotrophic Bacteria to the Carbon Cycle in the Ocean

Kolber, Zbigniew; Gerald, F.; Plumley,; Lang, Andrew S.; Beatty, J. Thomas; Blankenship, Robert E.; VanDover, Cindy L.; Vetriani, Costantino; Koblížek, Michal; Rathgeber, Christopher; Falkowski, Paul G.

doi:10.1126/science.1059707

Cited by 399 publications

(453 citation statements)

References 24 publications

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“…The values (up to 3.1 ng l −1 ) are consistent with other studies of oligotrophic environments (Cottrell et al, 2006;Kolber et al, 2001;Schwalbach and Fuhrman, 2005;Sieracki et al, 2006). Both AAP bacterial abundance and BChl-a concentrations significantly decreased with increasing longitude and oligotrophy from west to east, though both varied less with location than with depth.…”

Section: Discussionsupporting

confidence: 80%

“…AAP bacteria were found to be more abundant in the upper layers of the photic zone than below the sunlit layers of the water column of the Mediterranean Sea. Other studies also reported that AAP bacteria are major bacterial components in the photic zone, in agreement with their phototrophic abilities (Cottrell et al, 2006;Kolber et al, 2001).…”

Section: Bacterial Productionsupporting

confidence: 58%

“…Few studies have used all these methods together (Kolber et al, 2001;Lami et al, 2009). In this study, we found significant correlations between AAP bacterial abundance, BChl-a fluorescence and concentrations revealing new insights in the distribution and controls of AAP bacteria.…”

Section: Discussionmentioning

confidence: 60%

“…The intensity of the 974 D. Lamy et al: Aerobic anoxygenic phototrophs in the Mediterranean Sea 2005). The metabolic flexibility, fast growth, high abundance and widespread occurrence of these organisms in both marine and freshwater environments challenge our view of carbon and energy budgets (Eiler, 2006;Lamy et al, 2011;Mašín et al, 2008;Moran and Miller, 2007) and suggest that AAP bacteria play a significant role in aquatic food webs and biogeochemical cycles (Koblížek et al, 2007;Kolber et al, 2001). …”

mentioning

confidence: 99%

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Ecology of aerobic anoxygenic phototrophic bacteria along an oligotrophic gradient in the Mediterranean Sea

et al. 2011

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Abstract. Aerobic anoxygenic phototrophic (AAP) bacteria are photoheterotrophic prokaryotes able to use both light and organic substrates for energy production. They are widely distributed in coastal and oceanic environments and may contribute significantly to the carbon cycle in the upper ocean. To better understand questions regarding links between the ecology of these photoheterotrophic bacteria and the trophic status of water masses, we examined their horizontal and vertical distribution and the effects of nutrient additions on their growth along an oligotrophic gradient in the Mediterranean Sea. Concentrations of bacteriochlorophyll-a (BChl-a) and AAP bacterial abundance decreased from the western to the eastern basin of the Mediterranean Sea and were linked with concentrations of chlorophyll-a, nutrient and dissolved organic carbon. Inorganic nutrient and glucose additions to surface seawater samples along the oligotrophic gradient revealed that AAP bacteria were nitrogen-and carbon-limited in the ultraoligotrophic eastern basin. The intensity of the Correspondence to: D. Lamy (lamyd2@univie.ac.at) AAP bacterial growth response generally differed from that of the total bacterial growth response. BChl-a quota of AAP bacterial communities was significantly higher in the eastern basin than in the western basin, suggesting that reliance on phototrophy varied along the oligotrophic gradient and that nutrient and/or carbon limitation favors BChl-a synthesis.

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Section: Discussionsupporting

confidence: 80%

Section: Bacterial Productionsupporting

confidence: 58%

Section: Discussionmentioning

confidence: 60%

mentioning

confidence: 99%

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Ecology of aerobic anoxygenic phototrophic bacteria along an oligotrophic gradient in the Mediterranean Sea

et al. 2011

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“…This organism is a close phylogenetical relative of aerobic anoxygentic phototrophs. Aerobic anoxygenic phototrophs are estimated to comprise 11% of the microbial community in the ocean and have been implicated in as much as 5-10% of the photosynthetic potential in the oceans (Kolber et al 2001;Goericke 2002). Because of their important role in the oceans, understanding how this group of organisms may oxidize Mn(II) is especially intriguing and relevant.…”

Section: Introductionmentioning

confidence: 99%

In vitro studies indicate a quinone is involved in bacterial Mn(II) oxidation

Johnson

Tebo

2007

Arch Microbiol

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Manganese(II)-oxidizing bacteria play an integral role in the cycling of Mn as well as other metals and organics. Prior work with Mn(II)-oxidizing bacteria suggested that Mn(II) oxidation involves a multicopper oxidase, but whether this enzyme directly catalyzes Mn(II) oxidation is unknown. For a clearer understanding of Mn(II) oxidation, we have undertaken biochemical studies in the model marine α-proteobacterium, Erythrobacter sp. strain SD21. The optimum pH for Mn(II)-oxidizing activity was 8.0 with a specific activity of 2.5 nmol × min −1 × mg −1 and a K m = 204 µM. The activity was soluble suggesting a cytoplasmic or periplasmic protein. Mn(III) was an intermediate in the oxidation of Mn(II) and likely the primary product of enzymatic oxidation. The activity was stimulated by pyrroloquinoline quinone (PQQ), NAD + , and calcium but not by copper. In addition, PQQ rescued Pseudomonas putida MnB1 non Mn(II)-oxidizing mutants with insertions in the anthranilate synthase gene. The substrate and product of anthranilate synthase are intermediates in various quinone biosyntheses. Partially purified Mn(II) oxidase was enriched in quinones and had a UV/VIS absorption spectrum similar to a known quinone requiring enzyme but not to multicopper oxidases. These studies suggest that quinones may play an integral role in bacterial Mn(II) oxidation.

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Photosynthetic Pigments in Marine Algae and Bacteria

DiTullio

Geesey

2003

Encyclopedia of Environmental Microbiology

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Biochemistry of Pigments in Algae and Bacteria Methods for Identification and Quantification of Pigments Ecological Distributions of Algal and Bacterial Pigments Pigments and Taxonomy CHEMTAX Analysis of Phytoplankton Community Composition

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Contribution of Aerobic Photoheterotrophic Bacteria to the Carbon Cycle in the Ocean

Cited by 399 publications

References 24 publications

Ecology of aerobic anoxygenic phototrophic bacteria along an oligotrophic gradient in the Mediterranean Sea

Ecology of aerobic anoxygenic phototrophic bacteria along an oligotrophic gradient in the Mediterranean Sea

In vitro studies indicate a quinone is involved in bacterial Mn(II) oxidation

Photosynthetic Pigments in Marine Algae and Bacteria

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