The echo from outside: ASCORBATE PEROXIDASE 1 modulates cytosolic effector-triggered reactive oxygen species

Article Plant Sciences

Ascorbate peroxidase 1 allows monitoring of cytosolic accumulation of effector-triggered reactive oxygen species using a luminol-based assay

Xiufang Hong et al.

Summary: This study reveals the role of cytosolic ascorbate peroxidase 1 (APX1) in the activation of the immune response and its ability to catalyze chemiluminescence reactions for monitoring the accumulation of effector-triggered reactive oxygen species (ROS) in the cytosol.

PLANT PHYSIOLOGY (2023)

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Article Plant Sciences

Organelle-targeted biosensors reveal distinct oxidative events during pattern-triggered immune responses

Dominique Arnaud et al.

Summary: Reactive oxygen species are generated in plants in response to pathogens and pathogen-associated molecular patterns. Using biosensors, researchers observed oxidative events in various cell compartments during the immune response to flg22 and Pseudomonas syringae. The oxidative burst in the cytosol is partially suppressed by bacterial effectors, while the extracellular oxidative burst requires the involvement of NADPH oxidase and specific signaling components.

PLANT PHYSIOLOGY (2023)

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Article Biochemistry & Molecular Biology

The receptor-like cytosolic kinase RIPK activates NADP-malic enzyme 2 to generate NADPH for fueling ROS production

Binyan Wu et al.

Summary: This study reveals that the phosphorylation and activation of NADP-ME2 by RIPK can rapidly increase cytoplasmic NADPH levels, fueling ROS production in plant immunity.

MOLECULAR PLANT (2022)

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Article Multidisciplinary Sciences

Pattern-recognition receptors are required for NLR-mediated plant immunity

Minhang Yuan et al.

Summary: The plant immune system consists of pattern-triggered immunity (PTI) and effector-triggered immunity (ETI), which are activated by different mechanisms and involve distinct signaling cascades. PTI is triggered by microbial patterns via cell surface receptors, while ETI is activated by pathogen effector proteins via intracellular receptors.

NATURE (2021)

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Letter Plant Sciences

The latest HyPe(r) in plant H2O2 biosensing

Jose Manuel Ugalde et al.

Summary: HyPer7 can detect minute amounts of H2O2 regardless of pH and glutathione redox potential, enabling the detection of physiological H2O2 fluxes within the cytosol and between subcellular compartments.

PLANT PHYSIOLOGY (2021)

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Article Plant Sciences