Carbon fixation from mineral carbonates

Guida, Brandon S.; Bose, Maitrayee; García-Pichel, Ferrán

doi:10.1038/s41467-017-00703-4

Cited by 13 publications

(14 citation statements)

References 25 publications

(23 reference statements)

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“…18 ). Previous studies in euendolithic cyanobacterium Mastigocoleus testarum 28 showed that the released Ca 2+ from the carbocite passively diffused into the apical cell, moved thereafter from cell to cell, and was finally pumped into the liquid medium by the distal cell through a P-type calcium ATPase. In Pyropia , two genes encoding P-type calcium ATPase were identified and both of them exhibited high expression in the conchocelis.…”

Section: Resultsmentioning

confidence: 99%

Pyropia yezoensis genome reveals diverse mechanisms of carbon acquisition in the intertidal environment

Wang

et al. 2020

Nat Commun

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Changes in atmospheric CO 2 concentration have played a central role in algal and plant adaptation and evolution. The commercially important red algal genus, Pyropia (Bangiales) appears to have responded to inorganic carbon (C i ) availability by evolving alternating heteromorphic generations that occupy distinct habitats. The leafy gametophyte inhabits the intertidal zone that undergoes frequent emersion, whereas the sporophyte conchocelis bores into mollusk shells. Here, we analyze a high-quality genome assembly of Pyropia yezoensis to elucidate the interplay between C i availability and life cycle evolution. We find horizontal gene transfers from bacteria and expansion of gene families (e.g. carbonic anhydrase, anti-oxidative related genes), many of which show gametophyte-specific expression or significant up-regulation in gametophyte in response to dehydration. In conchocelis, the release of HCO 3 - from shell promoted by carbonic anhydrase provides a source of C i . This hypothesis is supported by the incorporation of 13 C isotope by conchocelis when co-cultured with 13 C-labeled CaCO 3 .

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Section: Resultsmentioning

confidence: 99%

Pyropia yezoensis genome reveals diverse mechanisms of carbon acquisition in the intertidal environment

Wang

et al. 2020

Nat Commun

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“…In light of a recent study by Guida et al . (2017), endolithic microalgae such as Ostreobium , could also use bicarbonate ions (HCO 3 − ) released during carbonate dissolution for photosynthesis. Indeed, these authors showed that the microboring cyanobacterium, Mastigocoleus testarum (in cultured strain BC008 and under natural conditions), is able to fix carbon derived from mineral calcite substrate when seawater DIC is limiting.…”

Section: Discussionmentioning

confidence: 99%

Functional diversity of microboringOstreobiumalgae isolated from corals

Massé

Tribollet

Méziane

et al. 2020

Environmental Microbiology

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Summary The filamentous chlorophyte Ostreobium sp. dominates shallow marine carbonate microboring communities, and is one of the major agents of reef bioerosion. While its large genetic diversity has emerged, its physiology remains little known, with unexplored relationship between genotypes and phenotypes (endolithic versus free‐living growth forms). Here, we isolated nine strains affiliated to two lineages of Ostreobium (>8% sequence divergence of the plastid gene rbcL), one of which was assigned to the family Odoaceae, from the fast‐growing coral host Pocillopora acuta Lamarck 1816. Free‐living isolates maintained their bioerosive potential, colonizing pre‐bleached coral carbonate skeletons. We compared phenotypes, highlighting shifts in pigment and fatty acid compositions, carbon to nitrogen ratios and stable isotope compositions (δ13C and δ15N). Our data show a pattern of higher chlorophyll b and lower arachidonic acid (20:4ω6) content in endolithic versus free‐living Ostreobium. Photosynthetic carbon fixation and nitrate uptake, quantified via 8 h pulse‐labeling with 13C‐bicarbonate and 15N‐nitrate, showed lower isotopic enrichment in endolithic compared to free‐living filaments. Our results highlight the functional plasticity of Ostreobium phenotypes. The isotope tracer approach opens the way to further study the biogeochemical cycling and trophic ecology of these cryptic algae at coral holobiont and reef scales.

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“…in dead carbonate substrates (Enochs et al, 2016). In light of a recent study by Guida et al (2017), endolithic microalgae such as Ostreobium, could also use bicarbonate ions (HCO 3 -) released during carbonate dissolution for photosynthesis. Indeed, these authors showed that the microboring cyanobacterium, Mastigocoleus testarum (in cultured strain BC008 and under natural conditions), is able to fix carbon derived from mineral calcite substrate when seawater DIC is limiting.…”

Section: Nutritional (C and N) Sources For Ostreobium Phenotypesmentioning

confidence: 99%

Functional diversity of microboringOstreobiumalgae isolated from corals

Massé

Tribollet

Méziane

et al. 2020

Preprint

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The filamentous chlorophyte Ostreobium sp. dominates shallow marine carbonate microboring communities, and is one of the major agents of reef bioerosion. While its large genetic diversity has emerged, its physiology remains little known, with unexplored relationship between genotypes and phenotypes (endolithic versus free-living growth forms). Here, we isolated 9 strains affiliated to 2 lineages of Ostreobium (>8% sequence divergence of the plastid gene rbcL), one of which was assigned to the family Odoaceae, from the fast-growing coral host Pocillopora acuta Lamarck 1816. Free-living isolates maintained their bioerosive potential, colonizing pre-bleached coral carbonate skeletons. We compared phenotypes, highlighting shifts in pigment and fatty acid compositions, carbon to nitrogen ratios and stable isotope compositions (δ13C and δ15N). Our data show a pattern of higher chlorophyll b and lower arachidonic acid (20:4ω6) content in endolithic versus free-living Ostreobium. Photosynthetic carbon fixation and nitrate uptake, quantified via 8h pulse-labeling with 13C-bicarbonate and 15N-nitrate, showed lower isotopic enrichment in endolithic compared to free-living filaments. Our results highlight the functional plasticity of Ostreobium phenotypes. The isotope tracer approach opens the way to further study the biogeochemical cycling and trophic ecology of these cryptic algae at coral holobiont and reef scales.

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Carbon fixation from mineral carbonates

Cited by 13 publications

References 25 publications

Pyropia yezoensis genome reveals diverse mechanisms of carbon acquisition in the intertidal environment

Pyropia yezoensis genome reveals diverse mechanisms of carbon acquisition in the intertidal environment

Functional diversity of microboringOstreobiumalgae isolated from corals

Functional diversity of microboringOstreobiumalgae isolated from corals

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