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Sugar signalling and antioxidant network connections in plant cells
Author(s) -
BolouriMoghaddam Mohammad Reza,
Le Roy Katrien,
Xiang Li,
Rolland Filip,
Van den Ende Wim
Publication year - 2010
Publication title -
the febs journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.981
H-Index - 204
eISSN - 1742-4658
pISSN - 1742-464X
DOI - 10.1111/j.1742-4658.2010.07633.x
Subject(s) - hexokinase , sugar , reactive oxygen species , antioxidant , biochemistry , chemistry , signalling , mitochondrion , microbiology and biotechnology , carbohydrate metabolism , nutrient sensing , function (biology) , cell signaling , metabolism , biology , glycolysis , signal transduction
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.