Inorganic carbon concentrating mechanisms in free-living and symbiotic dinoflagellates and chromerids.

Raven, JA; Suggett, DJ; Giordano, M

Inorganic carbon concentrating mechanisms in free-living and symbiotic dinoflagellates and chromerids.

Raven, JA Suggett, DJ Giordano, M

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Publisher:: Wiley
Publication Type:: Journal Article
Citation:: Journal of phycology, 2020, 56, (6), pp. 1377-1397
Issue Date:: 2020-07-11

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Field	Value	Language
dc.contributor.author	Raven, JA
dc.contributor.author	Suggett, DJ
dc.contributor.author	Giordano, M
dc.date.accessioned	2020-12-16T05:12:04Z
dc.date.available	2020-06-23
dc.date.available	2020-12-16T05:12:04Z
dc.date.issued	2020-07-11
dc.identifier.citation	Journal of phycology, 2020, 56, (6), pp. 1377-1397
dc.identifier.issn	0022-3646
dc.identifier.issn	1529-8817
dc.identifier.uri	http://hdl.handle.net/10453/144771
dc.description.abstract	Photosynthetic dinoflagellates are ecologically and biogeochemically important in marine and freshwater environments. However, surprisingly little is known of how this group acquires inorganic carbon or how these diverse processes evolved. Consequently, how CO2 availability ultimately influences the success of dinoflagellates over space and time remains poorly resolved compared to other microalgal groups. Here we review the evidence. Photosynthetic core dinoflagellates have a Form II RuBisCO (replaced by Form IB or Form ID in derived dinoflagellates). The in vitro kinetics of the Form II RuBisCO from dinoflagellates are largely unknown, but dinoflagellates with Form II (and other) RuBisCOs have inorganic carbon concentrating mechanisms (CCMs), as indicated by in vivo internal inorganic C accumulation and affinity for external inorganic C. However, the location of the membrane(s) at which the essential active transport component(s) of the CCM occur(s) is (are) unresolved; isolation and characterization of functionally competent chloroplasts would help in this respect. Endosymbiotic Symbiodiniaceae (in Foraminifera, Acantharia, Radiolaria, Ciliata, Porifera, Acoela, Cnidaria, and Mollusca) obtain inorganic C by transport from seawater through host tissue. In corals this transport apparently provides an inorganic C concentration around the photobiont that obviates the need for photobiont CCM. This is not the case for tridacnid bivalves, medusae, or, possibly, Foraminifera. Overcoming these long-standing knowledge gaps relies on technical advances (e.g., the in vitro kinetics of Form II RuBisCO) that can functionally track the fate of inorganic C forms.
dc.format	Print-Electronic
dc.language	eng
dc.publisher	Wiley
dc.relation	http://purl.org/au-research/grants/arc/DP160100271
dc.relation.ispartof	Journal of phycology
dc.relation.isbasedon	10.1111/jpy.13050
dc.rights	info:eu-repo/semantics/closedAccess
dc.subject	0607 Plant Biology, 0704 Fisheries Sciences
dc.subject.classification	Marine Biology & Hydrobiology
dc.title	Inorganic carbon concentrating mechanisms in free-living and symbiotic dinoflagellates and chromerids.
dc.type	Journal Article
utslib.citation.volume	56
utslib.location.activity	United States
utslib.for	0607 Plant Biology
utslib.for	0704 Fisheries Sciences
pubs.organisational-group	/University of Technology Sydney/Faculty of Science
pubs.organisational-group	/University of Technology Sydney/Strength - C3 - Climate Change Cluster
pubs.organisational-group	/University of Technology Sydney
utslib.copyright.status	closed_access	*
pubs.consider-herdc	false
dc.date.updated	2020-12-16T05:11:44Z
pubs.issue	6
pubs.publication-status	Published
pubs.volume	56
utslib.citation.issue	6

Abstract:

Photosynthetic dinoflagellates are ecologically and biogeochemically important in marine and freshwater environments. However, surprisingly little is known of how this group acquires inorganic carbon or how these diverse processes evolved. Consequently, how CO2 availability ultimately influences the success of dinoflagellates over space and time remains poorly resolved compared to other microalgal groups. Here we review the evidence. Photosynthetic core dinoflagellates have a Form II RuBisCO (replaced by Form IB or Form ID in derived dinoflagellates). The in vitro kinetics of the Form II RuBisCO from dinoflagellates are largely unknown, but dinoflagellates with Form II (and other) RuBisCOs have inorganic carbon concentrating mechanisms (CCMs), as indicated by in vivo internal inorganic C accumulation and affinity for external inorganic C. However, the location of the membrane(s) at which the essential active transport component(s) of the CCM occur(s) is (are) unresolved; isolation and characterization of functionally competent chloroplasts would help in this respect. Endosymbiotic Symbiodiniaceae (in Foraminifera, Acantharia, Radiolaria, Ciliata, Porifera, Acoela, Cnidaria, and Mollusca) obtain inorganic C by transport from seawater through host tissue. In corals this transport apparently provides an inorganic C concentration around the photobiont that obviates the need for photobiont CCM. This is not the case for tridacnid bivalves, medusae, or, possibly, Foraminifera. Overcoming these long-standing knowledge gaps relies on technical advances (e.g., the in vitro kinetics of Form II RuBisCO) that can functionally track the fate of inorganic C forms.

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http://hdl.handle.net/10453/144771