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Related Concept Videos

Cell Signaling in Plants01:25

Cell Signaling in Plants

Plant cells communicate to coordinate their cycle of growth, flowering and fruiting, and activities in roots, shoots, and leaves in response to the changing environmental conditions. Plant signaling is distinct from animal signaling. Plants primarily utilize enzyme-linked receptors, whereas the largest class of cell-surface receptors in animals are G-protein coupled receptors (GPCRs). Unlike animals, receptor tyrosine kinases are rare in plants. Instead, plants have a diverse class of...
Redox Reactions01:27

Redox Reactions

Redox reactions are vital biochemical processes that underpin energy metabolism in cells. These reactions involve the transfer of electrons between molecules, occurring in tandem as oxidation and reduction. Oxidation refers to the loss of electrons, while reduction denotes their gain. This coupling ensures the seamless flow of electrons through metabolic pathways. For example, in bacterial metabolism, glucose undergoes oxidation to carbon dioxide, while oxygen is simultaneously reduced to...
Redox Reactions01:24

Redox Reactions

Oxidation-reduction or redox reactions involve the transfer of electrons from one molecule or atom to another. When an atom gains an electron, another atom must lose an electron, meaning oxidation and reduction must occur together. Since the redox occurs in pairs, the atom that gets oxidized is also called the reducing agent or reductant, and the atom that is reduced is also called the oxidizing agent or oxidant. A straightforward way to remember the definitions of oxidation and reduction is...
Photoreceptors and Plant Responses to Light02:00

Photoreceptors and Plant Responses to Light

Light plays a significant role in regulating the growth and development of plants. In addition to providing energy for photosynthesis, light provides other important cues to regulate a range of developmental and physiological responses in plants.
Redox Equilibria: Overview01:23

Redox Equilibria: Overview

A reduction-oxidation reaction is commonly called a redox reaction. In a redox reaction, electrons are transferred from one species to another rather than being shared between or among atoms. The reducing agent or reductant is the species that loses electrons and gets oxidized in the process. The species that gains electrons and gets reduced in the process is the oxidizing agent or oxidant. Redox reactions are represented as two separate equations called half-reactions, where one equation...
Oxidation-Reduction Reactions03:11

Oxidation-Reduction Reactions

Oxidation–Reduction Reactions

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Pattern-Triggered Oxidative Burst and Seedling Growth Inhibition Assays in Arabidopsis thaliana
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Redox signaling in plants.

Christine H Foyer1, Graham Noctor

  • 1Centre for Plant Sciences, Faculty of Biology, University of Leeds, Leeds, United Kingdom. c.foyer@leeds.ac.uk

Antioxidants & Redox Signaling
|February 28, 2013
PubMed
Summary

Plants master redox regulation, integrating signals from metabolism and environment using reactive oxygen species (ROS) and antioxidants. This controls plant growth and defense through complex signaling networks.

Area of Science:

  • Plant Biology
  • Biochemistry
  • Cell Signaling

Background:

  • Plants generate reactive oxygen species (ROS) during photosynthesis and metabolism.
  • ROS and antioxidants form crucial redox-regulated signaling systems within plant cells.
  • The apoplast, with low antioxidant capacity, significantly contributes to plant redox signaling.

Purpose of the Study:

  • To provide an authoritative perspective on plant redox signaling.
  • To explore the interplay between redox and hormone signaling pathways.
  • To understand how these pathways regulate plant growth and defense.

Main Methods:

  • Review and synthesis of current research on plant redox signaling.
  • Analysis of the roles of ROS, antioxidants, and redox-active proteins.

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  • Examination of interactions with plant hormones like salicylic acid, jasmonic acid, and auxin.

    • Main Results:

    • Redox signaling is compartment-specific, with the apoplast playing a key role.
    • Plant hormones modulate redox signaling to control growth and defense.
    • Redox gradients across cellular compartments enable versatile signaling.

    Conclusions:

    • Plants expertly utilize oxidants and antioxidants for redox regulation.
    • Redox signaling integrates environmental cues and metabolic status.
    • This intricate system allows precise control over plant development and defense responses.