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JXB Advance Access originally published online on June 18, 2004
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Journal of Experimental Botany, Vol. 55, No. 402, pp. 1597-1599, July 2004
Journal of Experimental Botany, Vol. 55, No. 402, © Society for Experimental Biology 2004; all rights reserved

GENE NOTES

A Pinus radiata AAA-ATPase, the expression of which increases with tree ageing

L. Borja Diego1, María Berdasco1, Mario F. Fraga1, M. Jesús Cañal1,2,*, Roberto Rodríguez1,2 and Carmen Castresana3,4

1Laboratorio Fisiología Vegetal, Departamento BOS, Facultad de Biología, Universidad de Oviedo, C/ Catedrático Rodrigo Uría s/n. E-33071, Oviedo, Spain
2Instituto de Biotecnología de Asturias (asociado al CSIC), E-33071, Oviedo, Spain
3Centro Nacional de Investigaciones Oncológicas, Madrid, Spain
4Laboratorio Genética Molecular de Plantas, Centro Nacional de E-28049 Madrid, Spain

* To whom correspondence should be addressed at: Universidad de Oviedo. Fax: +34 98 510 48 67. E-mail: mjcanal{at}correo.uniovi.es

Abstract

Age-dependent changes in gene expression profiles were studied in vegetative Pinus radiata buds by means of differential display. Among several candidate cDNAs, a 327 bp fragment that shows high homology with an Arabidopsis thaliana 20S proteasome ATPase designated RPT5a was found. Northern hybridization confirmed that the accumulation of this transcript increases with tree ageing, suggesting a possible role of this AAA-ATPase gene in development-related specific proteolysis.

Key words: Ageing, ATPase, expression, Pinus radiata, proteasome, proteolysis, RPT5a


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