Efecto del Alga Endofita Colaconema daviesii (Rhodophyta, Colaconematales) sobre las fases microscopicas, y primeros estados de desarrollo del Alga Parda Macrocystis pyrifera (Ochrophyta, Laminariales)
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Fecha
2022
Profesor/a Guía
Facultad/escuela
Idioma
es
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Universidad Andrés Bello
Nombre de Curso
Licencia CC
Licencia CC
Resumen
Durante el último tiempo se han realizado múltiples reportes en diferentes
regiones del mundo sobre la aparición de nuevas especies endófitas
pertenecientes al orden Colaconematales. En Chile, se describió a
Colaconema daviesii, un alga endófita filamentosa caracterizada durante el
año 2020 infectando al alga roja Chondracanthus chamissoi produciendo
síntomas tales como, manchas rojas en la superficie y zonas de necrosis, y
posteriormente se ha observado su infección sobre otras algas en particular
Macrocystis pyrifera y Lessonia trabeculata. M. pyrifera es un alga parda del
orden Laminariales catalogada como un organismo fundacional ya que es una
de las principales algas que componen los llamados bosques de kelp, los
cuales actualmente se han visto amenazados por múltiples estresores tanto
bióticos como abióticos, siendo uno de estos, las enfermedades producto de
interacciones parasitarias que producen diversos organismos endófitos. Por lo
tanto, el presente estudio busca determinar, mediante la realización de co cultivo, cómo la presencia de C. daviesii afecta las etapas tempranas de M.
pyrifera, específicamente su efecto sobre el desarrollo de gametofitos y
esporofitos. Para ello se realizaron cultivos de M. pyrifera en dos de sus
estadios iniciales siendo gametofitos y esporofitos en co-cultivo con el alga
endófita C. daviesii, para posteriormente determinar el crecimiento, formación
de oogonios y la fertilidad de gametofitos, al igual que se determinó la tasa de
crecimiento y la sobrevivencia de los esporofitos al estar en presencia de C.
daviesii.
During the last time, multiple reports have been made in different regions of the world on the appearance of new endophytic species belonging to the order Colaconematales. In Chile, Colaconema daviesii, a filamentous endophyte alga characterized during the year 2020, was described as infecting the red alga Chondracanthus chamissoi producing symptoms such as red spots on the surface, areas of necrosis, and subsequently its infection has been observed on other algae such as Macrocystis pyrifera and Lessonia trabeculata. M. pyrifera is a brown algae of the order Laminariales cataloged as a founding organism since it is one of the main algae that make up the so-called kelp forests, which have currently been threatened by multiple stressors, both biotic and abiotic, one of these being, diseases resulting from parasitic interactions produced by various endophytic organisms. Therefore, the present study seeks to determine, through co-cultivation, how the presence of C. daviesii affects the early stages of M. pyrifera, specifically its effect on the development of gametophytes and sporophytes. For this, cultures of M. pyrifera were carried out in two of its initial stages, being gametophytes and sporophytes in co culture with the endophytic alga C. daviesii, to later determine the growth, formation of oogonia and the fertility of gametophytes, as was determined the growth rate and survival of sporophytes when in the presence of C. daviesii.
During the last time, multiple reports have been made in different regions of the world on the appearance of new endophytic species belonging to the order Colaconematales. In Chile, Colaconema daviesii, a filamentous endophyte alga characterized during the year 2020, was described as infecting the red alga Chondracanthus chamissoi producing symptoms such as red spots on the surface, areas of necrosis, and subsequently its infection has been observed on other algae such as Macrocystis pyrifera and Lessonia trabeculata. M. pyrifera is a brown algae of the order Laminariales cataloged as a founding organism since it is one of the main algae that make up the so-called kelp forests, which have currently been threatened by multiple stressors, both biotic and abiotic, one of these being, diseases resulting from parasitic interactions produced by various endophytic organisms. Therefore, the present study seeks to determine, through co-cultivation, how the presence of C. daviesii affects the early stages of M. pyrifera, specifically its effect on the development of gametophytes and sporophytes. For this, cultures of M. pyrifera were carried out in two of its initial stages, being gametophytes and sporophytes in co culture with the endophytic alga C. daviesii, to later determine the growth, formation of oogonia and the fertility of gametophytes, as was determined the growth rate and survival of sporophytes when in the presence of C. daviesii.
Notas
Tesis (Licenciado en Biología)
Palabras clave
Algas Marinas, Investigaciones