Aspergillus sydowii marine fungal bloom in Australian coastal waters, its metabolites and potential impact on Symbiodinium dinoflagellates

Hayashi, Aiko, Crombie, Andrew, Lacey, Ernest, Richardson, Anthony J., Vuong, Daniel, Piggott, Andrew M. and Hallegraeff, Gustaaf (2016) Aspergillus sydowii marine fungal bloom in Australian coastal waters, its metabolites and potential impact on Symbiodinium dinoflagellates. Marine Drugs, 14 3: . doi:10.3390/md14030059


Author Hayashi, Aiko
Crombie, Andrew
Lacey, Ernest
Richardson, Anthony J.
Vuong, Daniel
Piggott, Andrew M.
Hallegraeff, Gustaaf
Title Aspergillus sydowii marine fungal bloom in Australian coastal waters, its metabolites and potential impact on Symbiodinium dinoflagellates
Formatted title
Aspergillus sydowii marine fungal bloom in Australian coastal waters, its metabolites and potential impact on Symbiodinium dinoflagellates
Journal name Marine Drugs   Check publisher's open access policy
ISSN 1660-3397
Publication date 2016-03-16
Year available 2016
Sub-type Article (original research)
DOI 10.3390/md14030059
Open Access Status DOI
Volume 14
Issue 3
Total pages 14
Place of publication Basel, Switzerland
Publisher M D P I AG
Collection year 2017
Language eng
Formatted abstract
Dust has been widely recognised as an important source of nutrients in the marine environment and as a vector for transporting pathogenic microorganisms. Disturbingly, in the wake of a dust storm event along the eastern Australian coast line in 2009, the Continuous Plankton Recorder collected masses of fungal spores and mycelia (∼150,000 spores/m3) forming a floating raft that covered a coastal area equivalent to 25 times the surface of England. Cultured A. sydowii strains exhibited varying metabolite profiles, but all produced sydonic acid, a chemotaxonomic marker for A. sydowii. The Australian marine fungal strains share major metabolites and display comparable metabolic diversity to Australian terrestrial strains and to strains pathogenic to Caribbean coral. Secondary colonisation of the rafts by other fungi, including strains of Cladosporium, Penicillium and other Aspergillus species with distinct secondary metabolite profiles, was also encountered. Our bioassays revealed that the dust-derived marine fungal extracts and known A. sydowii metabolites such as sydowic acid, sydowinol and sydowinin A adversely affect photophysiological performance (Fv / Fm) of the coral reef dinoflagellate endosymbiont Symbiodinium. Different Symbiodinium clades exhibited varying sensitivities, mimicking sensitivity to coral bleaching phenomena. The detection of such large amounts of A. sydowii following this dust storm event has potential implications for the health of coral environments such as the Great Barrier Reef.
Keyword Aspergillus sydowii
Coral disease
Maximum quantum yield (Fv/Fm)
Secondary metabolites
Sydonic acid
Sydonol
Sydowinin
Sydowinol
Symbiodinium
Q-Index Code C1
Q-Index Status Provisional Code
Institutional Status UQ

Document type: Journal Article
Sub-type: Article (original research)
Collections: School of Mathematics and Physics
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