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Related Concept Videos

Redox Equilibria: Overview01:23

Redox Equilibria: Overview

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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...
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Oxidation and Reduction of Organic Molecules01:19

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Energy production within a cell involves many coordinated chemical pathways. Most of these pathways are combinations of oxidation and reduction reactions, which occur at the same time. An oxidation reaction strips an electron from an atom in a compound, and the addition of this electron to another compound is a reduction reaction. Because oxidation and reduction usually occur together, these pairs of reactions are called redox reactions.
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Oxidation–Reduction Reactions
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The light reactions of photosynthesis assume a linear flow of electrons from water to NADP+. During this process, light energy drives the splitting of water molecules to produce oxygen. However, oxidation of water molecules is a thermodynamically unfavorable reaction and requires a strong oxidizing agent. This is accomplished by the first product of light reactions: oxidized P680 (or P680+), the most powerful oxidizing agent known in biology. The oxidized P680 that acquires an electron from the...
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Electrochemistry is the science involved in the interconversion of electrical and chemical reactions. Such reactions are called reduction-oxidation, or redox reactions. These important reactions are defined by changes in oxidation states for one or more reactant elements and include a subset of reactions involving the transfer of electrons between reactant species. Electrochemistry as a field has evolved to yield sufficient insights on the fundamental principles of redox chemistry and multiple...
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Ribulose 1,5- bisphosphate carboxylase/oxygenase (RuBisCo) is a critical enzyme that catalyzes carbon dioxide assimilation during photosynthesis. However, it is an inefficient enzyme, having an extremely slow catalytic rate. A typical enzyme can process about a thousand molecules per second; however, RuBisCo fixes only around three-carbon dioxides per second. Photosynthetic cells compensate for this slow rate by synthesizing very high amounts of RuBisCo, making it the most abundant single...
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The redox code of plants.

Ron Mittler1,2, Dean P Jones3

  • 1Division of Plant Science and Technology, College of Agriculture Food and Natural Resources and Interdisciplinary Plant Group, University of Missouri, Columbia, Missouri, USA.

Plant, Cell & Environment
|December 13, 2023
PubMed
Summary
This summary is machine-generated.

The redox code, based on cellular redox state and reactive oxygen species, explains plant signaling. This framework is crucial for understanding plant responses to environmental changes like climate change.

Keywords:
celldevelopmentmetabolismnetworkreactive oxygen species (ROS)stress

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Area of Science:

  • Biochemistry
  • Plant Physiology
  • Cell Biology

Background:

  • Central metabolism relies on Nicotinamide Adenine Dinucleotide (NAD+/NADH) and NADP+/NADPH systems.
  • Reactive oxygen species (ROS), like H2O2, link metabolism to cellular regulation via redox proteome.
  • The 'redox code' describes how dynamic ROS changes regulate cellular functions.

Purpose of the Study:

  • To apply the 'redox code' principles to plant systems.
  • To explain cell-to-cell and plant-to-plant signaling in plants using the redox code.
  • To highlight the importance of the redox code in understanding plant responses to environmental stress.

Main Methods:

  • Review and synthesis of recent studies on redox signaling in plants.
  • Application of the established 'redox code' framework to plant physiology.
  • Analysis of how redox homeostasis impacts plant development and environmental responses.

Main Results:

  • The redox code effectively explains various signaling processes in plants, from subcellular to ecosystem levels.
  • Plant-to-plant and cell-to-cell communication can be understood through redox signaling.
  • The redox code provides a unified framework for plant biological processes.

Conclusions:

  • The redox code is a fundamental principle applicable across biological systems, including plants.
  • Understanding plant redox signaling is critical for addressing environmental challenges.
  • Future research should focus on applying the redox code to plant responses to global warming, climate change, and pollution.