Metabolite exchange is fundamental to the viability of the cnidarian–Symbiodiniaceae symbiosis and survival of coral reefs. Coral holobiont tolerance to environmental change might be achieved through changes in Symbiodiniaceae species composition, but differences in the metabolites supplied by different Symbiodiniaceae species could influence holobiont fitness. Using 13C stable-isotope labelling coupled to gas chromatography–mass spectrometry, we characterized newly fixed carbon fate in the model cnidarian Exaiptasia pallida (Aiptasia) when experimentally colonized with either native Breviolum minutum or non-native Durusdinium trenchii. Relative to anemones containing B. minutum, D. trenchii-colonized hosts exhibited a 4.5-fold reduction in 13C-labelled glucose and reduced abundance and diversity of 13C-labelled carbohydrates and lipogenesis precursors, indicating symbiont species-specific modifications to carbohydrate availability and lipid storage. Mapping carbon fate also revealed significant alterations to host molecular signalling pathways. In particular, D. trenchii-colonized hosts exhibited a 40-fold reduction in 13C-labelled scyllo-inositol, a potential interpartner signalling molecule in symbiosis specificity. 13C-labelling also highlighted differential antioxidant- and ammonium-producing pathway activities, suggesting physiological responses to different symbiont species. Such differences in symbiont metabolite contribution and host utilization may limit the proliferation of stress-driven symbioses; this contributes valuable information towards future scenarios that select in favour of less-competent symbionts in response to environmental change.
Partner switching and metabolic flux in a model cnidarian–dinoflagellate symbiosis
J. Matthews,Clinton A. Oakley,Adrian Lutz,Katie E. Hillyer,U. Roessner,A. Grossman,V. Weis,S. Davy
Published 2018 in Proceedings of the Royal Society B
ABSTRACT
PUBLICATION RECORD
- Publication year
2018
- Venue
Proceedings of the Royal Society B
- Publication date
2018-11-28
- Fields of study
Biology, Medicine, Environmental Science
- Identifiers
- External record
- Source metadata
Semantic Scholar, PubMed
CITATION MAP
EXTRACTION MAP
CLAIMS
- 13C labelling revealed differential antioxidant- and ammonium-producing pathway activities between the two symbiont states, consistent with symbiont species-specific physiological responses in the holobiont.박진우 (dztg5apj7m) extraction뀨 (7c402c1b98) reviewKiller Whale (322360f1c1) reviewB (s683577b42) reviewq (76h6bfydm6) reviewAK (4715169a40) reviewAnonymous (12632b8b5f) review
- Durusdinium trenchii-colonized hosts exhibited a 40-fold reduction in 13C-labelled scyllo-inositol, pointing to altered interpartner signaling-associated metabolite availability.박진우 (dztg5apj7m) extraction뀨 (7c402c1b98) reviewKiller Whale (322360f1c1) reviewB (s683577b42) reviewq (76h6bfydm6) reviewAK (4715169a40) reviewAnonymous (12632b8b5f) review
- Durusdinium trenchii-colonized hosts showed reduced abundance and diversity of 13C-labelled carbohydrates and lipogenesis precursors, indicating altered carbon allocation to host storage metabolism.박진우 (dztg5apj7m) extraction뀨 (7c402c1b98) reviewKiller Whale (322360f1c1) reviewB (s683577b42) reviewq (76h6bfydm6) reviewAK (4715169a40) reviewAnonymous (12632b8b5f) review
- Colonization with Durusdinium trenchii was associated with a 4.5-fold reduction in 13C-labelled glucose relative to Breviolum minutum-colonized anemones.박진우 (dztg5apj7m) extraction뀨 (7c402c1b98) reviewKiller Whale (322360f1c1) reviewB (s683577b42) reviewq (76h6bfydm6) reviewAK (4715169a40) reviewAnonymous (12632b8b5f) review
CONCEPTS
- 13c stable-isotope labelling
An isotope-tracing approach that uses 13C enrichment to follow newly fixed carbon into downstream metabolites.
Aliases: 13C labeling, 13C labelling
박진우 (dztg5apj7m) extraction뀨 (7c402c1b98) reviewKiller Whale (322360f1c1) reviewB (s683577b42) reviewq (76h6bfydm6) reviewAK (4715169a40) reviewAnonymous (12632b8b5f) review - ammonium-producing pathway
A host-associated metabolic pathway category inferred from labeled-carbon incorporation into ammonium-related metabolism.
Aliases: ammonium-producing pathways
박진우 (dztg5apj7m) extraction뀨 (7c402c1b98) reviewKiller Whale (322360f1c1) reviewB (s683577b42) reviewq (76h6bfydm6) reviewAK (4715169a40) reviewAnonymous (12632b8b5f) review - breviolum minutum
The native Symbiodiniaceae symbiont species used as one colonizing partner in the host experiments.
Aliases: B. minutum
박진우 (dztg5apj7m) extraction뀨 (7c402c1b98) reviewKiller Whale (322360f1c1) reviewB (s683577b42) reviewq (76h6bfydm6) reviewAK (4715169a40) reviewAnonymous (12632b8b5f) review - durusdinium trenchii
The non-native Symbiodiniaceae symbiont species used as the alternative colonizing partner in the host experiments.
Aliases: D. trenchii
박진우 (dztg5apj7m) extraction뀨 (7c402c1b98) reviewKiller Whale (322360f1c1) reviewB (s683577b42) reviewq (76h6bfydm6) reviewAK (4715169a40) reviewAnonymous (12632b8b5f) review - exaiptasia pallida (aiptasia)
The model cnidarian host used to study symbiosis with dinoflagellate symbionts.
Aliases: Aiptasia
박진우 (dztg5apj7m) extraction뀨 (7c402c1b98) reviewKiller Whale (322360f1c1) reviewB (s683577b42) reviewq (76h6bfydm6) reviewAK (4715169a40) reviewAnonymous (12632b8b5f) review - gas chromatography–mass spectrometry
An analytical platform used to separate and detect metabolite species in the labeled samples.
Aliases: GC-MS
박진우 (dztg5apj7m) extraction뀨 (7c402c1b98) reviewKiller Whale (322360f1c1) reviewB (s683577b42) reviewq (76h6bfydm6) reviewAK (4715169a40) reviewAnonymous (12632b8b5f) review - scyllo-inositol
An inositol stereoisomer measured among the labeled host metabolites.
Aliases: 13C-labelled scyllo-inositol
박진우 (dztg5apj7m) extraction뀨 (7c402c1b98) reviewKiller Whale (322360f1c1) reviewB (s683577b42) reviewq (76h6bfydm6) reviewAK (4715169a40) reviewAnonymous (12632b8b5f) review
REFERENCES
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