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A systems biology view of wood formation in Eucalyptus grandis trees submitted to different potassium and water regimes

Ployet Raphael, Veneziano Labate Monica, Regiani Thais, Christina Mathias, Morel Marie, San Clemente Hélène, Denis Marie, Favreau Bénédicte, Tomazello Filho Mario, Laclau Jean-Paul, Labate Carlos Alberto, Chaix Gilles, Grima Pettenati Jacqueline, Mounet Fabien. 2019. A systems biology view of wood formation in Eucalyptus grandis trees submitted to different potassium and water regimes. New Phytologist, 223 (2) : pp. 766-782.

Journal article ; Article de recherche ; Article de revue à facteur d'impact
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Quartile : Outlier, Sujet : PLANT SCIENCES

Abstract : (1)Wood production in fast‐growing Eucalyptus grandis trees is highly dependent on both potassium (K) fertilization and water availability but the molecular processes underlying wood formation in response to the combined effects of these two limiting factors are still unknown (2)E. grandis trees were submitted to four combinations of K‐fertilization and water supply. Weighted gene co‐expression network analysis (WGCNA) and MixOmics‐based co‐regulation networks were used to integrate xylem transcriptome, metabolome and complex wood traits. Functional characterization of a candidate gene was performed in transgenic E. grandis hairy roots. (3)This integrated network‐based approach enabled us to identify meaningful biological processes and regulators impacted by K‐fertilization and/or water limitation. It revealed that modules of co‐regulated genes and metabolites strongly correlated to wood complex traits are in the heart of a complex trade‐off between biomass production and stress responses. Nested in these modules, potential new cell wall regulators were identified as further confirmed by the functional characterization of EgMYB137. (4)These findings provide new insights into the regulatory mechanisms of wood formation under stress conditions pointing out both known and new regulators co‐opted by K‐fertilization and/or water limitation that may potentially promote adaptive wood traits.

Mots-clés Agrovoc : Eucalyptus grandis, Potassium, Besoin en eau, Bois, Propriété technologique

Classification Agris : K50 - Processing of forest products
F04 - Fertilizing
F60 - Plant physiology and biochemistry

Champ stratégique Cirad : CTS 2 (2019-) - Transitions agroécologiques

Auteurs et affiliations

  • Ployet Raphael, CNRS (FRA)
  • Veneziano Labate Monica, ESALQ (BRA)
  • Regiani Thais, Universidade de São Paulo (BRA)
  • Christina Mathias, CIRAD-PERSYST-UPR AIDA (REU) ORCID: 0000-0003-3618-756X
  • Morel Marie, CNRS (FRA)
  • San Clemente Hélène, CNRS (FRA)
  • Denis Marie, CIRAD-BIOS-UMR AGAP (FRA)
  • Favreau Bénédicte, CIRAD-BIOS-UMR AGAP (FRA) ORCID: 0000-0003-2786-9374
  • Tomazello Filho Mario, ESALQ (BRA)
  • Laclau Jean-Paul, CIRAD-DG-Saurs (FRA) ORCID: 0000-0002-2506-214X
  • Labate Carlos Alberto, Universidade de São Paulo (BRA)
  • Chaix Gilles, CIRAD-BIOS-UMR AGAP (FRA) ORCID: 0000-0003-2015-0551
  • Grima Pettenati Jacqueline, CNRS (FRA)
  • Mounet Fabien, CNRS (FRA) - auteur correspondant

Source : Cirad-Agritrop (https://agritrop.cirad.fr/591799/)

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