Remodeling of DNA methylation and phenotypic and transcriptional changes in synthetic Arabidopsis allotetraploids

• Autores: Madlung, Andreas; Masuelli, Ricardo Williams; Watson, Brian; Reynolds, Steve H.; Davison, Jerry; Comai, Luca
• Año de publicación: 2002
• Idioma: inglés
• Tipo de recurso: artículo
• Materia: POLYPLOIDY; HYBRIDS; METHYLATION; ARABIDOPSIS
• Institución: Consejo Nacional de Investigaciones Científicas y Técnicas

The joining of different genomes in allotetraploids played a major role in plant evolution, but the molecular implications of this event are poorly understood. In synthetic allotetraploids of Arabidopsis and Cardaminopsis arenosa, we previously demonstrated the occurrence of frequent gene silencing. To explore the involvement of epigenetic phenomena, we investigated the occurrence and effects of DNA methylation changes. Changes in DNA methylation patterns were more frequent in synthetic allotetraploids than in the parents. Treatment with 5-aza-2′-deoxycytidine, an inhibitor of DNA methyltransferase, resulted in the development of altered morphologies in the synthetic allotetraploids, but not in the parents. We profiled mRNAs in control and 5-aza-2′-deoxycytidine-treated parents and allotetraploids by amplified fragment length polymorphism-cDNA. We show that DNA demethylation induced and repressed two different transcriptomes. Our results are consistent with the hypothesis that synthetic allotetraploids have compromised mechanisms of epigenetic gene regulation.
Fil: Madlung, Andreas. University of Washington; Estados Unidos
Fil: Masuelli, Ricardo Williams. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Mendoza. Instituto de Biología Agrícola de Mendoza. Universidad Nacional de Cuyo. Facultad de Ciencias Agrarias. Instituto de Biología Agrícola de Mendoza; Argentina
Fil: Watson, Brian. University of Washington; Estados Unidos
Fil: Reynolds, Steve H.. University of Washington; Estados Unidos
Fil: Davison, Jerry. University of Washington; Estados Unidos
Fil: Comai, Luca. University of Washington; Estados Unidos