First report of microcystin-producing Fischerella sp. (Stigonematales, Cyanobacteria) in tropical Australia.

Samuel Cirés Carlos Alvarez-Roa Susanna A Wood Jonathan Puddick Virginia Loza Kirsten Heimann

Toxicon

School of Marine and Tropical Biology, James Cook University, Townsville 4811, Queensland, Australia; Centre for Sustainable Fisheries and Aquaculture, James Cook University, Townsville 4811, Queensland, Australia; Comparative Genomics Centre, James Cook University, Townsville 4811, Queensland, Australia; Centre for Biodiscovery and Molecular Development of Therapeutics, James Cook University, Townsville 4811, Queensland, Australia. Electronic address:

Published: September 2014

A polyphasic study of four Stigonematales cyanobacteria from tropical Australia (Queensland) revealed production of the hepatotoxins microcystins (MC-LR, MC-LA, MC-LF, MC-FR and demethyl-MC-LR) by Fischerella sp. NQAIF311 isolated from a seasonal creek. Total microcystin content reached 43 μg g(-1) dry weight. Phylogeny demonstrated high sequence similarities for 16S rRNA (99%), mcyE (97%) and mcyD (95%) genes with microcystin-producing Fischerella sp. CENA161 from Brazil. This is the first report of a cyanotoxin-producing Stigonematal in Australia.

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http://dx.doi.org/10.1016/j.toxicon.2014.06.010	DOI Listing

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