NAC: una superfamilia de factores transcripcionales y su rol en la tolerancia al estrés abiótico en Eucalyptus globulus.
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Date
2024
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Universidad de Concepción
Abstract
El estrés abiótico en plantas conduce a pérdidas económicas significativas al reducir el rendimiento, efectos agravados por el cambio climático actual. Debido a su rápido crecimiento, adaptabilidad y propiedades de la madera, Eucalyptus globulus se ha convertido en una especie fundamental en la industria forestal. Sin embargo, es vulnerable al estrés hídrico y sensible a las bajas temperaturas, lo que se traduce en una disminución de las tasas de crecimiento y un aumento en la mortalidad de las plantaciones. Para contrarrestar estos efectos las plantas generan cambios moleculares, donde la expresión diferencial de determinados genes genera mecanismos de tolerancia. Los factores de transcripción NAC son una extensa familia de reguladores genéticos implicados en múltiples procesos incluyendo la respuesta al estrés abiótico. Se identificaron 101 FT NAC en un transcriptoma de E. globulus sometido a tratamiento de estrés hídrico y frio. El análisis in silico reveló que 13 de ellos mostraban una mayor abundancia de transcritos en respuesta a los tratamientos de estrés abiótico. Estos resultados proporcionan la base para futuros estudios y análisis de los genes NAC y su rol en la respuesta al estrés abiótico en E. globulus.
Abiotic stress in plants leads to significant economic losses by reducing yield, effects enhanced by current climate change. Due to its rapid growth, adaptability, and wood properties, Eucalyptus globulus has become a key species in the forestry industry. However, it is vulnerable to drought stress and sensitive to low temperatures, resulting in decreased growth rates and increased plant mortality. To face these effects, plants generate molecular changes, where the differential expression of certain genes generates tolerance mechanisms. NAC transcription factors are an extensive family of genetic regulators involved in multiple processes, including response to abiotic stress. A total of 101 NAC TFs were identified in a transcriptome of E. globulus subjected to water and cold stress treatments. In silico analysis revealed that 13 of these genes showed higher transcript abundance in response to both stress treatments. These results provide important information for future studies and analysis of NAC genes and their role in abiotic stress response in E. globulus.
Abiotic stress in plants leads to significant economic losses by reducing yield, effects enhanced by current climate change. Due to its rapid growth, adaptability, and wood properties, Eucalyptus globulus has become a key species in the forestry industry. However, it is vulnerable to drought stress and sensitive to low temperatures, resulting in decreased growth rates and increased plant mortality. To face these effects, plants generate molecular changes, where the differential expression of certain genes generates tolerance mechanisms. NAC transcription factors are an extensive family of genetic regulators involved in multiple processes, including response to abiotic stress. A total of 101 NAC TFs were identified in a transcriptome of E. globulus subjected to water and cold stress treatments. In silico analysis revealed that 13 of these genes showed higher transcript abundance in response to both stress treatments. These results provide important information for future studies and analysis of NAC genes and their role in abiotic stress response in E. globulus.
Description
Tesis presentada para optar al grado académico de Doctor en Ciencias Forestales
Keywords
Fisiología vegetal, Eucaliptus globulus, Plantas Desarrollo