Video Experimental Relacionado
Updated: Jun 23, 2026
04:11
Pattern-Triggered Oxidative Burst and Seedling Growth Inhibition Assays in Arabidopsis thaliana
Published on: May 21, 2019
Los componentes autofágicos contribuyen a la muerte celular hipersensible en la Arabidopsis
Daniel Hofius1, Torsten Schultz-Larsen, Jan Joensen
1Department of Biology, Copenhagen Biocenter, University of Copenhagen, 2200 Copenhagen, Denmark.
Cell
|May 20, 2009
Resumen
La autofagia actúa como un mecanismo de supervivencia, restringiendo la muerte celular de la planta durante la defensa del patógeno. Los mutantes con deficiencia de autofagia muestran lesiones contenidas, revelando su papel en la muerte celular programada durante la inmunidad vegetal.
Área de la Ciencia:
- Inmunidad vegetal La inmunidad vegetal.
- Los procesos celulares son procesos que ocurren en las células.
- Biología molecular La biología molecular.
Sus antecedentes:
- La autofagia es un mecanismo de prosurvivencia que restringe la muerte celular programada (PCD) durante la inmunidad innata de las plantas.
- La respuesta de hipersensibilidad (HR) es una forma de PCD desencadenada por el reconocimiento de patógenos.
- La reducción de la expresión génica de la autofagia está relacionada con un aumento de la propagación de la lesión de HR.
Objetivo del estudio:
- Para investigar el papel de la autofagia en el receptor mediado por PCD de HR.
- Para analizar las respuestas HR en mutantes de Arabidopsis con deficiencia de autofagia (atg).
- Determinar la relación entre la autofagia y las diferentes vías de los receptores inmunes.
Principales métodos:
- Utilizó mutantes knockout de Arabidopsis con deficiencia de autofagia (atg).
- Examinó las respuestas mediadas por receptores de la DCP de la RH tras la infección.
- Se investigó la muerte celular HR desencadenada por los receptores inmunes de tipo Toll/Interleukin-1 (TIR) y de tipo en espiral (CC).
Principales resultados:
- Las lesiones de HR inducidas por la infección estaban contenidas en los mutantes de atg, contrariamente a los modelos anteriores.
- La muerte celular HR mediada por receptores inmunes de tipo TIR (a través de EDS1) fue suprimida en los mutantes atg.
- La DPC desencadenada por los receptores inmunes de tipo CC (a través de NDR1) fue independiente de la autofagia o involucró componentes autofágicos.
Conclusiones:
- La autofagia contribuye a la DPC de HR, actuando como una vía pro-muerte en ciertos contextos.
- La muerte celular autofágica puede operar en paralelo con otras vías de muerte celular durante la inmunidad vegetal.
- El papel de la autofagia en la ERPC depende de la vía específica del receptor inmune involucrada.
Más Videos Relacionados
11:50Bacterial Leaf Infiltration Assay for Fine Characterization of Plant Defense Responses using the Arabidopsis thaliana-Pseudomonas syringae Pathosystem
Published on: October 1, 2015
06:28Preparation of Intact Tissue for Microscopic Analysis of the Endosperm Cell Layer in Developing and Mature Arabidopsis Seeds
Published on: May 16, 2025
Videos de Conceptos Relacionados
01:18Autophagic Cell Death
Christian de Duve discovered “autophagy,” a process in which cellular components are engulfed by membrane-bound organelles called autophagosomes. The autophagosomes then fuse with lysosomes to digest the enclosed contents. Autophagy is generally activated in cells to prevent cell death. However, cell death is triggered when the damage is beyond repair.
Autophagy and Apoptosis
Autophagy can activate apoptosis. In normal conditions, the autophagy activating protein Beclin-1 and pro-apoptotic...
Autophagy and Apoptosis
Autophagy can activate apoptosis. In normal conditions, the autophagy activating protein Beclin-1 and pro-apoptotic...
01:22Cellular Injury V: Apoptosis and Autophagy
Cells respond to damage and stress through highly coordinated processes that decide whether they survive or undergo controlled self-destruction. Two major pathways involved in this regulation are apoptosis, a type of programmed cell death, and autophagy, a survival mechanism that helps cells adapt to adverse conditions.ApoptosisApoptosis removes aged or injured cells to maintain tissue balance. During this process, the cell shrinks, chromatin condenses and fragments, and membrane-bound...
01:27Autophagy
Autophagy is a self-digesting process by which a cell protects itself from threats both within and outside the cell, ranging from abnormal proteins to invading bacteria. In this process, obsolete components of the cell and invading microbes are degraded by hydrolytic enzymes active in an acidic environment of the lysosomal lumen.
An autophagic pathway consists of a series of signaling events activated in response to diverse stress and physiological conditions such as food deprivation,...
An autophagic pathway consists of a series of signaling events activated in response to diverse stress and physiological conditions such as food deprivation,...
01:30Overview of Cell Death
Cell death is an essential process where the body gets rid of old or damaged cells. Cell proliferation and death need to be balanced, as an imbalance between the two may lead to cancer or autoimmune diseases.
Cell death was observed in the early 19th century, but there was no experimental evidence to prove it. In 1842, Carl Vogt first discovered cell death in a metamorphic toad; however, it was not termed ‘cell death.’ Scientists discovered different cell death pathways only in the 20th century...
Cell death was observed in the early 19th century, but there was no experimental evidence to prove it. In 1842, Carl Vogt first discovered cell death in a metamorphic toad; however, it was not termed ‘cell death.’ Scientists discovered different cell death pathways only in the 20th century...
01:17Phagocytosis of Apoptotic Cells
Cells undergoing apoptosis form apoptotic bodies that must be removed immediately to prevent inflammation, autoimmune diseases, and necrosis. Phagocytosis is carried out by professional phagocytes such as macrophages or immature dendritic cells. Non-professional phagocytes such as epithelial cells and fibroblasts also take part in this process; however, they are not as effective as professional phagocytes.
Normal cells contain receptors that prevent them from being recognized by phagocytes.
Normal cells contain receptors that prevent them from being recognized by phagocytes.
01:30Apoptosis
Apoptosis is a combination of two Greek words, 'apo' and 'ptosis,' meaning separation and falling off, respectively. Hippocrates used this word to describe gangrene, which was caused due to bandaging of fractured bones. Apoptosis was distinguished from necrosis in 1970 when John Kerr reported observations of morphological changes occurring during apoptosis. During one experiment, he observed that the disruption of blood supply to the liver tissue resulted in a size reduction of the tissue.