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45S rDNA Diversity In Natura as One Step towards Ribosomal Heterogeneity in Arabidopsis thaliana.
Delorme-Hinoux, Valérie; Mbodj, Assane; Brando, Sophie; De Bures, Anne; Llauro, Christel; Covato, Fabrice; Garrigue, Joseph; Guisset, Claude; Borrut, Jacques; Mirouze, Marie; Reichheld, Jean-Philippe; Sáez-Vásquez, Julio.
Afiliação
  • Delorme-Hinoux V; Université de Perpignan Via Domitia (UPVD), Laboratoire Génome et Développement des Plantes (LGDP), UMR 5096, 66860 Perpignan, France.
  • Mbodj A; Centre National de la Recherche Scientifique, Laboratoire Génome et Développement des Plantes (LGDP), UMR 5096, 66860 Perpignan, France.
  • Brando S; EMR LGDP/MANGO, Mechanisms of Adaptation and Genomics, IRD-CNRS-UPVD, 66860 Perpignan, France.
  • De Bures A; Association Charles Flahault, 66350 Toulouges, France.
  • Llauro C; Université de Perpignan Via Domitia (UPVD), Laboratoire Génome et Développement des Plantes (LGDP), UMR 5096, 66860 Perpignan, France.
  • Covato F; Centre National de la Recherche Scientifique, Laboratoire Génome et Développement des Plantes (LGDP), UMR 5096, 66860 Perpignan, France.
  • Garrigue J; EMR LGDP/MANGO, Mechanisms of Adaptation and Genomics, IRD-CNRS-UPVD, 66860 Perpignan, France.
  • Guisset C; Institut de Recherche pour le Développement (IRD), ECOBIO, 34000 Montpellier, France.
  • Borrut J; Université de Perpignan Via Domitia (UPVD), Laboratoire Génome et Développement des Plantes (LGDP), UMR 5096, 66860 Perpignan, France.
  • Mirouze M; Centre National de la Recherche Scientifique, Laboratoire Génome et Développement des Plantes (LGDP), UMR 5096, 66860 Perpignan, France.
  • Reichheld JP; Université de Perpignan Via Domitia (UPVD), Laboratoire Génome et Développement des Plantes (LGDP), UMR 5096, 66860 Perpignan, France.
  • Sáez-Vásquez J; Centre National de la Recherche Scientifique, Laboratoire Génome et Développement des Plantes (LGDP), UMR 5096, 66860 Perpignan, France.
Plants (Basel) ; 12(14)2023 Jul 21.
Article em En | MEDLINE | ID: mdl-37514338
The keystone of ribosome biogenesis is the transcription of 45S rDNA. The Arabidopsis thaliana genome contains hundreds of 45S rDNA units; however, they are not all transcribed. Notably, 45S rDNA units contain insertions/deletions revealing the existence of heterogeneous rRNA genes and, likely, heterogeneous ribosomes for rRNAs. In order to obtain an overall picture of 45S rDNA diversity sustaining the synthesis of rRNAs and, subsequently, of ribosomes in natura, we took advantage of 320 new occurrences of Arabidopsis thaliana as a metapopulation named At66, sampled from 0 to 1900 m of altitude in the eastern Pyrenees in France. We found that the 45S rDNA copy number is very dynamic in natura and identified new genotypes for both 5' and 3' External Transcribed Spacers (ETS). Interestingly, the highest 5'ETS genotype diversity is found in altitude while the highest 3'ETS genotype diversity is found at sea level. Structural analysis of 45S rDNA also shows conservation in natura of specific 5'ETS and 3'ETS sequences/features required to control rDNA expression and the processing of rRNAs. In conclusion, At66 is a worthwhile natural laboratory, and unraveled 45S rDNA diversity represents an interesting starting material to select subsets for rDNA transcription and alter the rRNA composition of ribosomes both intra- and inter-site.
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Texto completo: 1 Base de dados: MEDLINE Idioma: En Revista: Plants (Basel) Ano de publicação: 2023 Tipo de documento: Article País de afiliação: França

Texto completo: 1 Base de dados: MEDLINE Idioma: En Revista: Plants (Basel) Ano de publicação: 2023 Tipo de documento: Article País de afiliação: França