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Journal of Experimental Botany, Vol. 51, No. 345, pp. 817-821, April 2000
© 2000 Oxford University Press

Short Communication

Differential expression of invertase genes in internal and external phloem tissues of potato (Solanum tuberosum L.)

P.E. Hedley, A.L. Maddison1, D. Davidson and G.C. Machray2

Department of Cell and Molecular Genetics, Scottish Crop Research Institute, Invergowrie, Dundee DD2 5DA, UK

The cloning of promoter sequences of two invertase genes from potato (Solanum tuberosum L.) is described. Histochemical analysis of series of reporter transgenic lines reveals phloem-expression from both promoters, with one expressed preferentially in internal phloem and the other in external phloem of stem vascular bundles.

Key words: Promoter, source-sink, vascular bundle.


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