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JXB Advance Access originally published online on March 18, 2008
Journal of Experimental Botany 2008 59(7):1663-1673; doi:10.1093/jxb/erm335
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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

SPECIAL ISSUE REVIEW PAPER

Roles of the bundle sheath cells in leaves of C3 plants

Richard C. Leegood*

Department of Animal and Plant Sciences, University of Sheffield, Sheffield S10 2TN, UK

* E-mail: r.leegood{at}sheffield.ac.uk

This review considers aspects of the structure and functions of the parenchymatous bundle sheath that surrounds the veins in the leaves of many C3 plants. It includes a discussion of bundle sheath structure and its related structures (bundle sheath extensions and the paraveinal mesophyll), its relationship to the mestome sheath in some grasses, and its chloroplast content. Its metabolic roles in photosynthesis, carbohydrate synthesis and storage, the import and export of nitrogen and sulphur, and the metabolism of reactive oxygen species are discussed and are compared with the role of the bundle sheath in leaves of C4 plants. Its role as an interface between the vasculature and the mesophyll is considered in relation to the movement of water and assimilates during leaf development, export of photosynthates, and senescence.

Key words: Bundle sheath, C3 plants, C4 photosynthesis, compartmentation, leaf metabolism

Received 6 September 2007; Revised 22 October 2007 Accepted 3 December 2007


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