Band-Schmidt, C.J., L.J., Fernández-Herrera, T., Zenteno-Savín, I., Leyva-Valencia, C.J., Hernández-Guerrero, N.V., Herrera Herrera, L., Durán-Riveroll, F.E., Hernández-Sandoval, J.J., Bustillos-Guzmán, A.R., Díaz-Marrero & J.J., Fernandez (2023). Allelopathy in marine dinoflagellates. What have we learned?. 20th International Conference on Harmful Algae. Hiroshima, Japón, noviembre 5 - 10, 2023, 41.
Christine Johanna Band-Schmidt 1, Leyberth José Fernández-Herrera 2, Tania Zenteno-Savín 2, Ignacio Leyva-Valencia 3, Claudia Judith Hernández-Guerrero 4, Nadia Valeria Herrera Herrera 1, Lorena Durán-Riveroll 5, Francisco Eduardo Hernández-Sandoval 2, Jose J. Bustillos-Guzmán 2, Ana Raquel Díaz-Marrero 6 y José J. Fernandez 7
Biotic factors such as allelopathy ha ve been recognized to play a significant role in regulating marine microalgae communities. To understand the complex and subtle allelopathic interactions among microalgal species extensive research is still needed. The dinoflagellate Gymnodinium catenatum is a paralytic toxin producing species known to form harmful algal blooms (H ABs) in several regions. The allelopathic response of G. catenatum to cells and cell free media of coexisting species was evaluated. Cells and cell free media of the raphidophyte Chattonella marina, and dinoflagellates Margalefidinium polykrikoides and Gymnodinium impudicum have allelopathic effects towards G. catenatum. Several triggering effects have been detected: growth inhibition, changes in cell morphology, and response to cellular stress, all of which lead to cell lysis; also, an increase in the activity of caspase 3 suggest an induction of programmed cell death. When transferring cells to media without allelochemicals a low number of cells can survive , in which toxin content per cell increases chain forming cells have a higher growth rate than single cells and temporary cysts can be formed, suggesting that the survival strategy of G. catenatum is migration through the chemical cloud, encystment and an increased toxicity. Allelopathic studies in epibenthic dinoflagellates are scarce, due to the complexity of cultivating these species however similar responses such as growth inhibition and alterations in cell morphology that lead to cell lysis are observed in Coolia malayensis when exposed to Amphidinium species. Information on biotic interactions allows decision-makers to foresee the consequences of human and climate-driven impacts on the fragile marine ecosystems.
Palabras clave: allelopathy; marine dinoflagellates
Para obtener una copia del documento contacta la personal de la biblioteca a través del correo bibliocicimar{a}ipn.mx