Microcystis aeruginosa CAAT 2005 strain from Argentina:phylogenetic and toxicological characterization has been accepted for a poster presentation at the taking place in South Africa from 11 ? 16 August

L. ROSSO, M. ; KOLMAN, M. ; CAIXACH J; FLORES C; SALERNO G; GIANNUZZI L; ANDRINOLO D

Jhoanesberg

Conferencia; 9th International Conference on Toxic Cyanobacteria; 1013

A novel toxic cyanobacterium strain identified as Microcystis aeruginosa was isolated from a water body of Buenos Aires Province, Argentine. We report that the first Argentinian strain of M. aeruginosa (CAAT 2005-3) growing under culture conditions maintain the typical colonial architecture of M. aeruginosa with profuse mucilage. M. aeruginosa CAAT2005-3 expresses a toxin variant, that was identified by LC-HRMS / Orbitrapas as [D-Leu1] microcystin-LR ([M + H] + = 1037.8 m / z). This microcystin variant has been also detected in M. aeruginosa samples from Canada, Brasil and Argentina. This work provides the basis for technological development and production of analytical standards of toxins present in our region.