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Aclimatación de sistemas al estrés osmótico en células de cigmateofitas

Jaccoline M S Zegers¹, Lukas Pfeifer², Tatyana Darienko^3,4

¹University of Göttingen, Institute for Microbiology and Genetics, Department of Applied Bioinformatics, Göttingen, Germany. jaccoline.zegers@uni-goettingen.de.

Nature communications

|January 16, 2026

Resumen

Las cigmateofitas, los parientes algales más cercanos de las plantas terrestres, se aclimatán con éxito al estrés osmótico. Sus respuestas revelan mecanismos clave para la supervivencia terrestre, ofreciendo información sobre la evolución temprana de las plantas.

Área de la Ciencia:

Biología evolutiva de plantas
Biología de algas
Fisiología del estrés

Sus antecedentes:

Las cigmateofitas son los parientes algales más cercanos de las plantas terrestres.
Comprender su respuesta a los estresores terrestres, como el estrés osmótico, es crucial para inferir las adaptaciones tempranas de las plantas terrestres.
Este estudio investiga cómo estas algas hacen frente a los desafíos osmóticos.

Objetivo del estudio:

Investigar las respuestas moleculares y fisiológicas de las cigmateofitas al estrés osmótico.
Establecer un modelo de cómo estos parientes algales de las plantas terrestres se aclimatán a los desafíos osmóticos.
Identificar componentes del conjunto de herramientas de terestrialización en algas.

Principales métodos:

Aplicación de dos estresores osmóticos en cigmateofitas unicelulares y multicelulares.
Enfoque multi-ómico: análisis transcriptómico, proteómico y metabolómico durante un período de 25 horas.
Análisis integrado con fotofisiología, análisis de azúcares, inmunocitoquímica y microscopía.

Principales resultados:

Las cigmateofitas exhiben una aclimatación exitosa al estrés osmótico a través de respuestas divergentes.
Un chasis proteico compartido sustenta estos mecanismos adaptativos.
Los datos revelan estrategias moleculares y fisiológicas específicas para la tolerancia al estrés osmótico.

Conclusiones:

Las cigmateofitas poseen un robusto conjunto de herramientas para superar el estrés osmótico, un desafío terrestre clave.
Los hallazgos proporcionan un modelo para la aclimatación de algas al estrés osmótico, informando nuestra comprensión de la terestrialización de las plantas.
Esta investigación destaca mecanismos conservados relevantes para la evolución temprana de las plantas terrestres.

Palabras clave:

cigmateofitas estrés osmótico aclimatación evolución de las plantas terestrialización biología vegetal biología de algas fisiología del estrés

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