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Biochemical Society Transactions (2005) 33, (943–944) (Printed in Great Britain)

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Organ specificity in the circadian control of plant gene expression

S. Sullivan, M. Shenton and H.G. Nimmo¹

Division of Biochemistry and Molecular Biology, Institute of Biomedical and Life Sciences, University of Glasgow, Glasgow G12 8QQ, U.K.

Key words: Arabidopsis thaliana, carbon allocation, circadian control, gene expression, organ specificity, phosphoenolpyruvate carboxylase kinase.

Abbreviations used: CAM, crassulacean acid metabolism; PEPc, phosphoenolpyruvate carboxylase.

¹To whom correspondence should be addressed (email h.g.nimmo@bio.gla.ac.uk).

Abstract

Of the many plant genes whose expressions are controlled by the circadian clock, one of the phosphoenolpyruvate carboxylase kinase genes in soya bean (Glycine max) exhibits the unusual property that its control is organ-specific – it is under circadian control in leaves but not in roots. Preliminary experiments suggest that the same is true for at least one gene in Arabidopsis thaliana. It will be important to define the extent and function of this phenomenon and the underlying mechanism.

Received 26 July 2005

© 2005 Biochemical Society