| Literature DB >> 28526120 |
Lesley Rhodes1, Kirsty F Smith2, Arjun Verma3, Belinda G Curley4, D Tim Harwood2, Sam Murray2, Gurjeet S Kohli5, Dorothy Solomona6, Teina Rongo7, Rex Munday8, Shauna A Murray9.
Abstract
Two isolates of a new tropical, epiphytic dinoflagellate species, Gambierdiscus honu sp. nov., were obtained from macroalgae sampled in Rarotonga, Cook Islands, and from North Meyer Island, Kermadec Islands. Gambierdiscus honu sp. nov. had the common Gambierdiscus Kofoidian plate formula: Po, 3', 6″, 6C?, 6 or 7S, 5‴, 1p and 2⁗. The characteristic morphological features of this species were its relatively small short dorsoventral length and width and the shape of individual plates, in particular the combination of the hatchet-shaped 2' and pentagonal 3' plates and the length to width ratio of the antapical 1p plate. The combination of these characteristics plus the smooth thecal surface and equal sized 1⁗ and 2⁗ plates differentiated this species from other Gambierdiscus species. The phylogenetic analyses supported the unique description. Both isolates of G. honu produced the putative maitotoxin (MTX)-3 analogue, but neither produced ciguatoxin (CTX) or MTX. Extracts of G. honu were shown to be highly toxic to mice by intraperitoneal injection (0.2mg/kg), although less toxic by gavage. It is possible that toxins other than putative MTX-3 are produced.Entities:
Keywords: Ciguatoxin; Cook Islands; Epiphytic dinoflagellates; Gambierdiscus; LSU rDNA; Maitotoxin; Phylogeny; SSU rDNA
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Year: 2017 PMID： 28526120 DOI： 10.1016/j.hal.2017.04.010
Source DB: PubMed Journal: Harmful Algae ISSN： 1568-9883 Impact factor: 4.273