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| Content Provider | PubMed Central |
|---|---|
| Author | Kopp, Christophe Isabelle, Domart-coulon Escrig, Stephane Humbel, Bruno M. Michel, Hignette Meibom, Anders |
| Copyright Year | 2015 |
| Abstract | Reef-building corals form essential, mutualistic endosymbiotic associations with photosynthetic Symbiodinium dinoflagellates, providing their animal host partner with photosynthetically derived nutrients that allow the coral to thrive in oligotrophic waters. However, little is known about the dynamics of these nutritional interactions at the (sub)cellular level. Here, we visualize with submicrometer spatial resolution the carbon and nitrogen fluxes in the intact coral-dinoflagellate association from the reef coral Pocillopora damicornis by combining nanoscale secondary ion mass spectrometry (NanoSIMS) and transmission electron microscopy with pulse-chase isotopic labeling using [13C]bicarbonate and [15N]nitrate. This allows us to observe that (i) through light-driven photosynthesis, dinoflagellates rapidly assimilate inorganic bicarbonate and nitrate, temporarily storing carbon within lipid droplets and starch granules for remobilization in nighttime, along with carbon and nitrogen incorporation into other subcellular compartments for dinoflagellate growth and maintenance, (ii) carbon-containing photosynthates are translocated to all four coral tissue layers, where they accumulate after only 15 min in coral lipid droplets from the oral gastroderm and within 6 h in glycogen granules from the oral epiderm, and (iii) the translocation of nitrogen-containing photosynthates is delayed by 3 h. |
| Related Links | http://dx.doi.org/10.1128/mbio.02299-14 |
| Ending Page | 14 |
| Starting Page | 2299 |
| File Format | |
| ISSN | 21507511 |
| e-ISSN | 21507511 |
| Journal | mBio |
| Issue Number | 1 |
| Volume Number | 6 |
| Language | English |
| Publisher | American Society of Microbiology |
| Publisher Date | 2015-02-27 |
| Access Restriction | Open |
| Rights Holder | American Society of Microbiology |
| Subject Keyword | Research in Higher Education |
| Content Type | Text |
| Resource Type | Article |
| Subject | Virology Microbiology |
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