Toxic marine epiphytic dinoflagellates,Ostreopsis siamensisandCoolia monotis(Dinophyceae), in New Zealand

Autor:	Ian Garthwaite, Lesley Rhodes, Janet Adamson, Lyn R. Briggs, Toshiyuki Suzuki
Rok vydání:	2000
Předmět:	Sodium channel activity Ostreopsidaceae Ecology biology Ostreopsis siamensis Aquatic Science biology.organism_classification Coolia monotis chemistry.chemical_compound chemistry Palytoxin Botany Epiphyte Ecology Evolution Behavior and Systematics Water Science and Technology Dinophyceae
Zdroj:	New Zealand Journal of Marine and Freshwater Research. 34:371-383
ISSN:	1175-8805 0028-8330
DOI:	10.1080/00288330.2000.9516939
Popis:	Ostreopsis siamensis and Coolia monotis (Ostreopsidaceae) are newly recognised additions to New Zealand's toxic marine microflora and occur epiphytically on seaweeds throughout subtropical New Zealand. O. siamensis “blooms” during summer, becoming freely motile; it tolerates temperatures of 15–25°C and salinities of 28–34 ppt. C. monotis also occurs in sediments in Nelson/ Marlborough and Stewart Island, at 10–30°C and salinities of 20–34 ppt. O. siamensis from Rangiputa, Northland, produced activity equivalent to ≤0.3 pg cell∼’ of palytoxin as measured using a haemolysis‐neutralisation assay, and cell extracts killed mice by intraperitoneal injection. Extracts of oysters fed with O. siamensis did not kill mice. C. monotis, from Rangiputa, produced compounds in extracts of cells and of culture supernatant which were also toxic to mice and which are currently being characterised. C. monotis caused positive sodium channel activity in neuroblastoma assays; O. siamensis was cytotoxic, and irreversibl...
Databáze:	OpenAIRE
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