Respuesta del crecimiento de los pelos radicales de Arabidopsis thaliana bajo condiciones de baja temperatura y déficit de fosfato y nitrato
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Fecha
2023
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Profesor/a Guía
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Idioma
es
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Universidad Andrés Bello
Nombre de Curso
Licencia CC
Licencia CC
Resumen
Las plantas son organismos sésiles que han desarrollado mecanismos para
enfrentar factores ambientales estresantes a lo largo de su evolución. Estos
factores generan respuestas fisiológicas y morfológicas en las distintas
estructuras de la planta para hacer frente a condiciones desfavorables, como la
baja disponibilidad de nutrientes y las bajas temperaturas, las cuales limitan el
crecimiento y disminuyen el metabolismo de la planta. Por ello, las estructuras
radiculares experimentan cambios en la densidad y longitud de pelos radicales
presentes en la epidermis de la raíz para optimizar la captación de nutrientes.
Este estudio analiza las distintas respuestas en la longitud de los pelos radicales
de A. thaliana ante el multi estrés de temperatura y nutrición. Para ello, se
utilizaron cinco ecotipos con distintos fenotipos en la longitud de los pelos
radicales. Se llevó a cabo un análisis fenotípico de los ecotipos sometidos a
distintas condiciones de temperatura y nutrición, así como un análisis de
expresión de factores de transcripción relevantes para la formación y elongación
de pelos radicales.
Los resultados del análisis fenotípico indican que A. thaliana genera distintas
respuestas en la longitud de los pelos radicales dependiendo del ecotipo
analizado y de las diferentes condiciones de temperatura y nutrición. También se
observaron diferentes respuestas en la expresión de los factores de transcripción
relevantes para la formación y elongación de pelos radicales en los distintos
ecotipos sometidos a las mismas condiciones.
Plants are sessile organisms that have developed mechanisms to cope with environmental stressors throughout their evolution. These stressors generate physiological and morphological responses in different plant structures to manage with unfavorable conditions, such as low nutrient availability and low temperatures, which limit plant growth and decrease metabolism. Therefore, root structures undergo changes in the density and length of root hairs present in the root epidermis to optimize nutrient uptake. This study analyzes the different responses in the length of root hairs of A. thaliana to the multi-stress of temperature and nutrition. To do this, five ecotypes with different phenotypes in the length of root hairs were used. A phenotypic analysis of the ecotypes subjected to different temperature and nutrition conditions was carried out, as well as an analysis of the expression of transcription factors relevant to the formation and elongation of root hairs. The results of the phenotypic analysis indicate that A. thaliana generates different responses in the length of root hairs depending on the ecotype analyzed and the different temperature and nutrition conditions. Different responses were also observed in the expression of transcription factors relevant to the formation and elongation of root hairs in the different ecotypes subjected to the same conditions.
Plants are sessile organisms that have developed mechanisms to cope with environmental stressors throughout their evolution. These stressors generate physiological and morphological responses in different plant structures to manage with unfavorable conditions, such as low nutrient availability and low temperatures, which limit plant growth and decrease metabolism. Therefore, root structures undergo changes in the density and length of root hairs present in the root epidermis to optimize nutrient uptake. This study analyzes the different responses in the length of root hairs of A. thaliana to the multi-stress of temperature and nutrition. To do this, five ecotypes with different phenotypes in the length of root hairs were used. A phenotypic analysis of the ecotypes subjected to different temperature and nutrition conditions was carried out, as well as an analysis of the expression of transcription factors relevant to the formation and elongation of root hairs. The results of the phenotypic analysis indicate that A. thaliana generates different responses in the length of root hairs depending on the ecotype analyzed and the different temperature and nutrition conditions. Different responses were also observed in the expression of transcription factors relevant to the formation and elongation of root hairs in the different ecotypes subjected to the same conditions.
Notas
Tesis (Licenciado en Biología)
Palabras clave
Arabidopsis Thaliana, Investigaciones, Pelo Radical (Biología), Crecimiento