Cloning of a calcium channel α1 subunit from the reef-building coral, Stylophora pistillata

Zoccola, Didier; Tambutté, Éric; Senegas-Balas, F.; Michiels, Jean‐François; Failla, Jean-Pierre; Jaubert, Jean; Allemand, Denis

doi:10.1016/s0378-1119(98)00602-7

Cited by 98 publications

(79 citation statements)

References 42 publications

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“…This is the first study to localize ion transport proteins relevant for acid/base regulation and photosynthesis in corals and only the second study to show localization of a coral Ca 2ϩ -transporting protein (58). The differential localization of ion transport proteins within different cell types or compartments within individual cells observed here may lead to a variety of cell-and tissue-specific responses (3) that would be missed by global or bulk mRNA and protein assessments.…”

Section: Perspectives and Significancementioning

confidence: 86%

Differential localization of ion transporters suggests distinct cellular mechanisms for calcification and photosynthesis between two coral species

Barott

Perez

Linsmayer

et al. 2015

American Journal of Physiology-Regulatory, Integrative and Comp

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Section: Perspectives and Significancementioning

confidence: 86%

Differential localization of ion transporters suggests distinct cellular mechanisms for calcification and photosynthesis between two coral species

Barott

Perez

Linsmayer

et al. 2015

American Journal of Physiology-Regulatory, Integrative and Comp

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“…It is made of calcium carbonate (CaCO 3 ) crystallized in the form of aragonite. The study of coral calcification started at the same time as the study of coral biology and then followed the evolution of techniques, from descriptive microscopy (73) to physiology (138), molecular biology (116,422,423), and genomics (145). This study has been greatly improved by the development of biological models such as microcolonies (353,354) and coral larvae (145), but the lack of an appropriate cellular model (88 [but see references 87 and 155]), as well as poor knowledge of the coral genome, continues to hinder progress.…”

Section: Coral Calcificationmentioning

confidence: 99%

Cell Biology of Cnidarian-Dinoflagellate Symbiosis

Davy

Allemand

Weis

2012

Microbiol Mol Biol Rev

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805

1,041

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SUMMARY The symbiosis between cnidarians (e.g., corals or sea anemones) and intracellular dinoflagellate algae of the genus Symbiodinium is of immense ecological importance. In particular, this symbiosis promotes the growth and survival of reef corals in nutrient-poor tropical waters; indeed, coral reefs could not exist without this symbiosis. However, our fundamental understanding of the cnidarian-dinoflagellate symbiosis and of its links to coral calcification remains poor. Here we review what we currently know about the cell biology of cnidarian-dinoflagellate symbiosis. In doing so, we aim to refocus attention on fundamental cellular aspects that have been somewhat neglected since the early to mid-1980s, when a more ecological approach began to dominate. We review the four major processes that we believe underlie the various phases of establishment and persistence in the cnidarian/coral-dinoflagellate symbiosis: (i) recognition and phagocytosis, (ii) regulation of host-symbiont biomass, (iii) metabolic exchange and nutrient trafficking, and (iv) calcification. Where appropriate, we draw upon examples from a range of cnidarian-alga symbioses, including the symbiosis between green Hydra and its intracellular chlorophyte symbiont, which has considerable potential to inform our understanding of the cnidarian-dinoflagellate symbiosis. Ultimately, we provide a comprehensive overview of the history of the field, its current status, and where it should be going in the future.

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“…Respiration and photosynthesis are considered as source and sink of CO 2 within the polyp tissue (Fig. 2, process 9 The passage of charged ions over the lipid bilayer of cell membranes can only be achieved via specific transport proteins or channels, both observed in coral cells (Zoccola et al, 1999. Calcium transport from the tissue to the calcifying fluid occurs against a concentration gradient and is assumed to be mediated by an active Ca 2+ -H + -antiporter (Ca-ATPase, Ip et al, 1991;Zoccola et al, 2004).…”

Section: Model Descriptionmentioning

confidence: 99%

“…To avoid protons from accumulating in the coral tissue, they are removed and eventually released into seawater . Since the gastric cavity of corals has a lower pH than the external seawater and since the pH is known to decrease in the dark (Agostini et al, 2012) , (2) passive calcium channel (Zoccola et al, 1999;Allemand et al, 2004), (3) active uptake of bicarbonate (Furla et al, 2000), (4) CO 2 diffusion (Sueltemeyer and Rinast, 1996), (5) active calcium transport (Ip et al, 1991;Zoccola et al, 2004), (6) active bicarbonate transport (Furla et al, 2000), (7) CO 2 diffusion (Sueltemeyer and Rinast, 1996), (8) aragonite precipitation (Burton and Walter, 1990), (9) photosynthesis and respiration (Al-Horani et al, 2003).…”

Section: Model Descriptionmentioning

confidence: 99%

Modelling coral polyp calcification in relation to ocean acidification

Hohn

Merico

2012

Biogeosciences

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Abstract. Rising atmospheric CO 2 concentrations due to anthropogenic emissions induce changes in the carbonate chemistry of the oceans and, ultimately, a drop in ocean pH. This acidification process can harm calcifying organisms like coccolithophores, molluscs, echinoderms, and corals. It is expected that ocean acidification in combination with other anthropogenic stressors will cause a severe decline in coral abundance by the end of this century, with associated disastrous effects on reef ecosystems. Despite the growing importance of the topic, little progress has been made with respect to modelling the impact of acidification on coral calcification. Here we present a model for a coral polyp that simulates the carbonate system in four different compartments: the seawater, the polyp tissue, the coelenteron, and the calcifying fluid. Precipitation of calcium carbonate takes place in the metabolically controlled calcifying fluid beneath the polyp tissue. The model is adjusted to a state of activity as observed by direct microsensor measurements in the calcifying fluid. We find that a transport mechanism for bicarbonate is required to supplement carbon into the calcifying fluid because CO 2 diffusion alone is not sufficient to sustain the observed calcification rates. Simulated CO 2 perturbation experiments reveal decreasing calcification rates under elevated pCO 2 despite the strong metabolic control of the calcifying fluid. Diffusion of CO 2 through the tissue into the calcifying fluid increases with increasing seawater pCO 2 , leading to decreased aragonite saturation in the calcifying fluid. Our modelling study provides important insights into the complexity of the calcification process at the organism level and helps to quantify the effect of ocean acidification on corals.

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Cloning of a calcium channel α1 subunit from the reef-building coral, Stylophora pistillata

Cited by 98 publications

References 42 publications

Differential localization of ion transporters suggests distinct cellular mechanisms for calcification and photosynthesis between two coral species

Differential localization of ion transporters suggests distinct cellular mechanisms for calcification and photosynthesis between two coral species

Cell Biology of Cnidarian-Dinoflagellate Symbiosis

Modelling coral polyp calcification in relation to ocean acidification

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