Sugar signalling and antioxidant network connections in plant cells

Sugars play important roles as both nutrients and regulatory molecules throughout plant life. Sugar metabolism and signalling function in an intricate network with numerous hormones and reactive oxygen species (ROS) production, signalling and scavenging systems. Although hexokinase is well known to...

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Bibliographic Details
Published in:The FEBS journal 2010-05, Vol.277 (9), p.2022-2037
Main Authors: Bolouri-Moghaddam, Mohammad Reza, Le Roy, Katrien, Xiang, Li, Rolland, Filip, Van den Ende, Wim
Format: Article
Language:English
Subjects:
Animals
antioxidant
Antioxidants - metabolism
beta-fructofuranosidase
Biochemistry
Botany
Carbohydrate Metabolism
fructan
hexokinase
Humans
invertase
Metabolism
mitochondria
phenolic compounds, ROS scavenging
Plants - metabolism
Reactive Oxygen Species - metabolism
senescence
Signal Transduction
signalling
Stress, Physiological
Sugar
sugars
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Summary:Sugars play important roles as both nutrients and regulatory molecules throughout plant life. Sugar metabolism and signalling function in an intricate network with numerous hormones and reactive oxygen species (ROS) production, signalling and scavenging systems. Although hexokinase is well known to fulfil a crucial role in glucose sensing processes, a scenario is emerging in which the catalytic activity of mitochondria-associated hexokinase regulates glucose-6-phosphate and ROS levels, stimulating antioxidant defence mechanisms and the synthesis of phenolic compounds. As a new concept, it can be hypothesized that the synergistic interaction of sugars (or sugar-like compounds) and phenolic compounds forms part of an integrated redox system, quenching ROS and contributing to stress tolerance, especially in tissues or organelles with high soluble sugar concentrations.
ISSN:1742-464X
1742-4658
DOI:10.1111/j.1742-4658.2010.07633.x