Differential gene expression in different types of Hevea brasiliensis roots

Differential gene expression in different types of Hevea brasiliensis roots. Putranto Riza Arief, Sanier Christine, Leclercq Julie, Duan Cuifang, Rio Maryannick, Jourdan Christophe, Thaler Philippe, Sabau Xavier, Argout Xavier, Montoro Pascal. 2012. Plant Science, 183 : 149-158.

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Article de revue ; Article de revue à facteur d'impact

Quartile : Q1, Sujet : PLANT SCIENCES / Quartile : Q2, Sujet : BIOCHEMISTRY & MOLECULAR BIOLOGY

Résumé : Three types of roots (taproots, first order laterals and second order laterals) were functionally characterized on 7-month-old in vitro plantlets regenerated by somatic embryogenesis in Hevea brasiliensis. A histological analysis revealed different levels of differentiation depending on root diameter. A primary structure was found in first and second order lateral roots, while taproots displayed a secondary structure. The expression of 48 genes linked to some of the regulatory pathways acting in roots was compared in leaves, stems and the different types of roots by real-time RT-PCR. Thirteen genes were differentially expressed in the different organs studied in plants grown under control conditions. Nine additional other genes were differentially regulated between organs under water deficit conditions. In addition, 10 genes were significantly regulated in response to water deficit, including 8 regulated mainly in lateral roots types. Our results suggest that the regulation of gene expression in lateral roots is different than that in taproots, which have a main role in nutrient uptake and transport, respectively. (Résumé d'auteur)

Mots-clés Agrovoc : Hevea brasiliensis, Système racinaire, Anatomie végétale, Eau du sol, Transpiration, PCR, Déficit hydrique du sol, Expression des gènes, Racine, Régulation physiologique

Classification Agris : F62 - Physiologie végétale : croissance et développement
F30 - Génétique et amélioration des plantes
U40 - Méthodes de relevé
F61 - Physiologie végétale : nutrition

Axe stratégique Cirad : Axe 1 (2005-2013) - Intensification écologique

Auteurs et affiliations

  • Putranto Riza Arief, CIRAD-BIOS-UMR AGAP (FRA)
  • Sanier Christine, CIRAD-BIOS-UMR AGAP (FRA)
  • Leclercq Julie, CIRAD-BIOS-UMR AGAP (FRA)
  • Duan Cuifang, CIRAD-BIOS-UMR AGAP (FRA)
  • Rio Maryannick, CIRAD-BIOS-UMR AGAP (FRA)
  • Jourdan Christophe, CIRAD-PERSYST-UMR Eco&Sols (FRA)
  • Thaler Philippe, CIRAD-PERSYST-UMR Eco&Sols (FRA)
  • Sabau Xavier, CIRAD-BIOS-UMR AGAP (FRA)
  • Argout Xavier, CIRAD-BIOS-UMR AGAP (FRA)
  • Montoro Pascal, CIRAD-BIOS-UMR AGAP (FRA)

Source : Cirad - Agritrop

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