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JXB Advance Access published online on November 26, 2008
Journal of Experimental Botany, doi:10.1093/jxb/ern297
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© The Author [2008]. Published by Oxford University Press [on behalf of the Society for Experimental Biology]. All rights reserved. For Permissions, please e-mail: journals.permissions@oxfordjournals.org

OPINION PAPER

Sucrose, sucrosyl oligosaccharides, and oxidative stress: scavenging and salvaging?

Wim Van den Ende1,* and Ravi Valluru2

1Laboratory for Molecular Plant Physiology, KU Leuven, Kasteelpark Arenberg 31, B-3001 Leuven, Belgium
2Institute for Crop Production and Grassland Research, University of Hohenheim, D-70599 Stuttgart, Germany

* To whom correspondence should be addressed. E-mail: wim.vandenende{at}bio.kuleuven.be

In nature, no single plant completes its life cycle without encountering environmental stress. When plant cells surpass stress threshold stimuli, chemically reactive oxygen species (ROS) are generated that can cause oxidative damage or act as signals. Plants have developed numerous ROS-scavenging systems to minimize the cytotoxic effects of ROS. The role of sucrosyl oligosaccharides (SOS), including fructans and the raffinose family oligosaccharides (RFOs), is well established during stress physiology. They are believed to act as important membrane protectors in planta. So far a putative role for sucrose and SOS during oxidative stress has largely been neglected, as has the contribution of the vacuolar compartment. Recent studies suggest a link between SOS and oxidative defence and/or scavenging. SOS might be involved in stabilizing membrane-associated peroxidases and NADPH oxidases, and SOS-derived radicals might fulfil an intermediate role in oxido-reduction reactions taking place in the vicinity of membranes. Here, these emerging features are discussed and perspectives for future research are provided.

Key words: Fructan, oxidative stress, raffinose, ROS, sucrose, sucrosyl oligosaccharides

Received 25 September 2008; Revised 20 October 2008 Accepted 23 October 2008


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