Four is better than one: Structure and function of a unique ascorbate peroxidase with four binding sites

Review Cell Biology

Reactive oxygen species signalling in plant stress responses

Ron Mittler et al.

Summary: This review discusses the essential role of reactive oxygen species (ROS) in plant responses to abiotic and biotic stresses, as well as the mechanisms of ROS signaling, regulation, and resilience in plants.

NATURE REVIEWS MOLECULAR CELL BIOLOGY (2022)

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Review Biochemistry & Molecular Biology

ROS and redox regulation of cell-to-cell and systemic signaling in plants during stress

Maria Angeles Pelaez-Vico et al.

Summary: Stress leads to increased accumulation of reactive oxygen species (ROS) in plants, altering cell redox state and activating defense mechanisms. Stress sensing in plants triggers systemic signals that travel to different parts of the plant and activate acclimation and defense mechanisms.

FREE RADICAL BIOLOGY AND MEDICINE (2022)

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Article Plant Sciences

PtomtAPX is an autonomous lignification peroxidase during the earliest stage of secondary wall formation in Populus tomentosa Carr

Jiaxue Zhang et al.

Summary: This study reveals the crucial role of mitochondrial ascorbate peroxidase in catalyzing lignin polymerization during the early stages of secondary cell wall formation. It also describes how xylem cells provide autonomous enzymes needed for lignin polymerization by coupling with the programmed cell death process.

NATURE PLANTS (2022)

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Article Biochemistry & Molecular Biology

Ascorbate Peroxidase Neofunctionalization at the Origin of APX-R and APX-L: Evidence from Basal Archaeplastida

Fernanda Lazzarotto et al.

Summary: This study identified two new families of peroxidases, APX-R and APX-L, in addition to hybrid proteins combining features of these families. The prevalence of hybrid proteins was found to vary among different groups of organisms.

ANTIOXIDANTS (2021)

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Article Plant Sciences