5 years ago

Ecophysiological characterization and toxin profile of two strains of Cylindrospermopsis raciborskii isolated from a subtropical lagoon in Southern Brazil

Leonardo Rubi Rörig, Roselane Laudares-Silva, Pablo Diego Gressler, Luiza Dy Fonseca Costa, Luana dos Santos Souza, Maria Cecília Miotto, José Bonomi Barufi, João Sarkis Yunes, Camila Nader, Débora Monteiro Brentano


In the present work, we attempted to characterize two isolates of Cylindrospermopsis raciborskii, LP1 and LP2, from Peri Lagoon, for their morphology, ecophysiology, and toxin profiles. The genetic identity of the isolates was confirmed by amplifying and sequencing 16S rRNA. The isolates showed different morphologies and significant differences in the length of trichomes. LP2 showed a trend for higher growth rates than LP1 at the different temperatures and N:P ratios. Both isolates showed low light requirements, but were able to tolerate irradiances of around 200 μmol photons m−2 s−1. LP2 showed higher concentrations of saxitoxin than LP1 and wider range of analogs, therefore being considered more toxic. These results support the hypothesis of ecotype selection for this species, which probably originated in response to environmental fluctuations in Peri Lagoon. Dominance during almost the entire year can be explained by the alternation of these ecotypes in the total biomass contribution according to their physiological advantages, contributing to the ecological success of this species.

Publisher URL: https://link.springer.com/article/10.1007/s10750-017-3243-y

DOI: 10.1007/s10750-017-3243-y

You might also like
Discover & Discuss Important Research

Keeping up-to-date with research can feel impossible, with papers being published faster than you'll ever be able to read them. That's where Researcher comes in: we're simplifying discovery and making important discussions happen. With over 19,000 sources, including peer-reviewed journals, preprints, blogs, universities, podcasts and Live events across 10 research areas, you'll never miss what's important to you. It's like social media, but better. Oh, and we should mention - it's free.

  • Download from Google Play
  • Download from App Store
  • Download from AppInChina

Researcher displays publicly available abstracts and doesn’t host any full article content. If the content is open access, we will direct clicks from the abstracts to the publisher website and display the PDF copy on our platform. Clicks to view the full text will be directed to the publisher website, where only users with subscriptions or access through their institution are able to view the full article.