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Plant Physiology 100:1171-1176 (1992)
© 1992 American Society of Plant Biologists

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Molecular Biology and Gene Regulation

Differential Expression and Sequence Analysis of Ribosomal Protein Genes Induced in Stolon Tips of Potato (Solanum tuberosum L.) during the Early Stages of Tuberization 1

Mark A. Taylor, Siti A. Mad Arif, Stephen R. Pearce, Howard V. Davies, Amar Kumar and Lesley A. George

Department of Cellular and Environmental Physiology, Scottish Crop Research Institute, Invergowrie, Dundee, DD2 5DA, United Kingdom, Department of Cell and Molecular Genetics, Scottish Crop Research Institute, Invergowrie, Dundee, DD2 5DA, United Kingdom, Department of Biochemistry, University of Dundee, Dundee, DD1 4HN, United Kingdom

cDNA clones of two genes, TUBS19 and TUBL7, which show a 15- to 20-fold increase in transcript level in the stolon tip during the early stages of tuberization, have been isolated by differential screening. These genes are also expressed in leaves, stems, and roots, and the expression pattern in these organs changes on tuberization. Southern analysis shows that there are similar sequences in the genome of nontuberizing wild-type potato species Solanum brevidens and in Lycopersicon esculentum (tomato). Sequence analysis reveals a high degree of similarity between the TUBS19 cDNA and the eukaryotic S19 ribosomal protein gene. TUBL7 cDNA shows similarity to another eukaryotic ribosomal protein gene, L7.

1 This work received financial support from the Scottish Office Agriculture and Fisheries Department. S.A.M.A. is supported by a grant from the Malaysian government.






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Copyright © 1992 by the American Society of Plant Biologists