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A new Gambierdiscus species (Dinophyceae) from Rarotonga, Cook Islands: Gambierdiscus cheloniae sp. nov
- Source :
- Harmful Algae. 60:45-56
- Publication Year :
- 2016
- Publisher :
- Elsevier BV, 2016.
-
Abstract
- © 2016 Elsevier B.V. Ciguatera fish poisoning (CFP) has been reported for many years in Rarotonga, Cook Islands, and has had the world's highest reported incidence of this illness for the last 20 years. Following intensive sampling to understand the distribution of the causative organisms of CFP, an undescribed Gambierdiscus species was isolated from the Rarotongan lagoon. Gambierdiscus cheloniae sp. nov. has the common Gambierdiscus Kofoidian plate formula (except for a variability in the number of precingular plates in aberrant cells): Po, 3′, 6″ (7″), 6C?, 6 or 7S, 5′″, 1p and 2″″. The 2′ plate is hatchet shaped and the dorsal end of 1p is pointed and the relatively narrow 1p plate. Morphologically G. cheloniae is similar to the genetically closely related species G. pacificus, G. toxicus and G. belizeanus, although smaller (depth and length) than G. toxicus. The apical pore plate varies from those of G. belizeanus and G. pacificus, which are shorter and narrower, and from G. toxicus, which is larger. G. cheloniae also differs from G. pacificus in the shape of the 2′ plate. The description of this new species is supported by phylogenetic analyses using three different gene regions. G. cheloniae produced the putative maitotoxin-3 analogue, MTX-3, but neither maitotoxin or monitored ciguatoxin. Extracts of G. cheloniae were shown to be highly toxic to mice by intraperitoneal (i.p.) injection, although they were less toxic by gavage. It is possible that this species produces toxins other than putative MTX-3.
- Subjects :
- 0106 biological sciences
0301 basic medicine
Ciguatoxin
Gambierdiscus cheloniae
Genes, Protozoan
Plant Science
Gambierdiscus
Aquatic Science
01 natural sciences
Polynesia
Mice
03 medical and health sciences
chemistry.chemical_compound
Species Specificity
Phylogenetics
Botany
Animals
Phylogeny
Ciguatera fish poisoning
Islands
Maitotoxin
biology
Phylogenetic tree
010604 marine biology & hydrobiology
Ciguatera Poisoning
biology.organism_classification
Marine Biology & Hydrobiology
030104 developmental biology
chemistry
Dinoflagellida
Marine Toxins
Dinophyceae
Subjects
Details
- ISSN :
- 15689883
- Volume :
- 60
- Database :
- OpenAIRE
- Journal :
- Harmful Algae
- Accession number :
- edsair.doi.dedup.....044679bb65d11388d157457bf98ea04a