Video Experimental Relacionado
Updated: Feb 10, 2026

11:42
Genetic Manipulation of the Plant Pathogen Ustilago maydis to Study Fungal Biology and Plant Microbe Interactions
Published on: September 30, 2016
15.1K
Las plantas envían pequeños ARN en vesículas extracelulares al patógeno fúngico para silenciar los genes de
Resumen
Las plantas usan pequeñas moléculas de ARN para combatir las infecciones fúngicas. La Arabidopsis thaliana libera vesículas que contienen estos pequeños ARN que desactivan los genes de los hongos, mostrando un nuevo mecanismo de defensa de la planta.
Área de la Ciencia:
- Interacciones con patógenos vegetales
- Biología molecular
- La genética
Sus antecedentes:
- Los patógenos entregan pequeños ARN (ARNs) para suprimir la inmunidad del huésped.
- Los organismos huéspedes pueden transferir ARNs a los patógenos para inhibir la virulencia.
- Se desconocen en gran medida los mecanismos de transferencia de ARNs de huésped a patógeno.
Objetivo del estudio:
- Investigar el mecanismo de transferencia de ARN s de las plantas huésped a los patógenos fúngicos.
- Para aclarar el papel de las vesículas extracelulares en la inmunidad de las plantas.
Principales métodos:
- Caracterización de las vesículas extracelulares similares a los exosomas secretadas por Arabidopsis.
- Análisis del contenido de ARNs dentro de estas vesículas.
- Seguimiento de la captación de vesículas por Botrytis cinerea.
- Pruebas de silenciamiento genético en el patógeno fúngico.
Principales resultados:
- La arabidopsis secreta vesículas extracelulares parecidas a los exosomas que contienen ARNs.
- Estas vesículas se acumulan en los sitios de infección y son internalizadas por Botrytis cinerea.
- Los ARNs de Arabidopsis transferidos silencian los genes esenciales de patogenicidad de los hongos.
- Esto representa un nuevo mecanismo de interferencia de ARN entre reinos.
Conclusiones:
- Arabidopsis emplea la entrega mediada por exosomas de ARNs para combatir las infecciones fúngicas.
- Este proceso funciona como un componente crítico de la respuesta inmune de las plantas.
- Los hallazgos revelan una estrategia evolucionada en la carrera armamentista evolutiva entre huésped y patógeno.
Videos de Conceptos Relacionados
siRNA - Small Interfering RNAs
18.7K
Small interfering RNAs, or siRNAs, are short regulatory RNA molecules that can silence genes post-transcriptionally, as well as the transcriptional level in some cases. siRNAs are important for protecting cells against viral infections and silencing transposable genetic elements.
In the cytoplasm, siRNA is processed from a double-stranded RNA, which comes from either endogenous DNA transcription or exogenous sources like a virus. This double-stranded RNA is then cleaved by the...
In the cytoplasm, siRNA is processed from a double-stranded RNA, which comes from either endogenous DNA transcription or exogenous sources like a virus. This double-stranded RNA is then cleaved by the...
18.7K
piRNA - Piwi-interacting RNAs
7.7K
PIWI-interacting RNAs, or piRNAs, are the most abundant short non-coding RNAs. More than 20,000 genes have been found in humans that code for piRNAs while only 2000 genes have been found for miRNAs. piRNAs can act at the transcriptional and post-transcriptional levels and have a vital role in silencing transposable elements present in germ cells. They are also involved in epigenetic silencing and activation. Previously, they were thought to function only in germ cells but new evidence suggests...
7.7K
lncRNA - Long Non-coding RNAs
10.0K
In humans, more than 80% of the genome gets transcribed. However, only around 2% of the genome codes for proteins. The remaining part produces non-coding RNAs which includes ribosomal RNAs, transfer RNAs, telomerase RNAs, and regulatory RNAs, among other types. A large number of regulatory non-coding RNAs have been classified into two groups depending upon their length – small non-coding RNAs, such as microRNA, which are less than 200 nucleotides in length, and long non-coding RNA...
10.0K
Tonicity in Plants
59.9K
Tonicity describes the capacity of a cell to lose or gain water. It depends on the quantity of solute that does not penetrate the membrane. Tonicity delimits the magnitude and direction of osmosis and results in three possible scenarios that alter the volume of a cell: hypertonicity, hypotonicity, and isotonicity. Due to differences in structure and physiology, tonicity of plant cells is different from that of animal cells in some scenarios.
59.9K
Plant Cells and Tissues
65.8K
Plant tissues are collections of similar cells performing related functions. Different plant tissues will have their own specialized roles and can be combined with other tissues to form organs such as flowers, fruit, stem, and leaves. Two major types of plant tissue include meristematic and permanent tissue.
65.8K
Organization of Genes
73.7K
Overview
73.7K

