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JXB Advance Access published online on June 18, 2004
Journal of Experimental Botany, doi:10.1093/jxb/erh171
© 2004 by Oxford University Press
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Received April 7, 2004; accepted April 14, 2004
© 2004 Society for Experimental Biology

GENE NOTE

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

L. Borja Diego 1, María Berdasco 1, Mario F. Fraga 1, M. Jesús Cañal 2*, Roberto Rodríguez 2, and Carmen Castresana 3

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

* To whom correspondence should be addressed. 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.

Keywords: Ageing, ATPase, expression, Pinus radiata, proteasome, proteolysis, RPT5a


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