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Long cold exposure induces transcriptional and biochemical remodelling of xylem secondary cell wall in Eucalyptus.
Ployet, Raphael; Soler, Marçal; Carocha, Victor; Ladouce, Nathalie; Alves, Ana; Rodrigues, José-Carlos; Harvengt, Luc; Marque, Christiane; Teulières, Chantal; Grima-Pettenati, Jacqueline; Mounet, Fabien.
Afiliação
  • Ployet R; Laboratoire de Recherche en Sciences Végétales, Université de Toulouse, CNRS, UPS, 31326 Castanet-Tolosan, France.
  • Soler M; Laboratoire de Recherche en Sciences Végétales, Université de Toulouse, CNRS, UPS, 31326 Castanet-Tolosan, France.
  • Carocha V; Laboratoire de Recherche en Sciences Végétales, Université de Toulouse, CNRS, UPS, 31326 Castanet-Tolosan, France.
  • Ladouce N; Instituto de Tecnologia de Química Biológica (ITQB), Biotecnologia de Células Vegetais, Av. da Republica, 2781-157 Oeiras, Portugal.
  • Alves A; Laboratoire de Recherche en Sciences Végétales, Université de Toulouse, CNRS, UPS, 31326 Castanet-Tolosan, France.
  • Rodrigues JC; Centro de Estudos Florestais, Instituto Superior de Agronomia, Universidade de Lisboa, Tapada da Ajuda, 1349-017 Lisboa, Portugal.
  • Harvengt L; Centro de Estudos Florestais, Instituto Superior de Agronomia, Universidade de Lisboa, Tapada da Ajuda, 1349-017 Lisboa, Portugal.
  • Marque C; FCBA, Biotechnology and Advanced Silviculture Department, Genetics and Biotechnology Team, F-33610 Cestas, France.
  • Teulières C; Laboratoire de Recherche en Sciences Végétales, Université de Toulouse, CNRS, UPS, 31326 Castanet-Tolosan, France.
  • Grima-Pettenati J; Laboratoire de Recherche en Sciences Végétales, Université de Toulouse, CNRS, UPS, 31326 Castanet-Tolosan, France.
  • Mounet F; Laboratoire de Recherche en Sciences Végétales, Université de Toulouse, CNRS, UPS, 31326 Castanet-Tolosan, France.
Tree Physiol ; 38(3): 409-422, 2018 03 01.
Article em En | MEDLINE | ID: mdl-28633295
Although eucalypts are the most planted hardwood trees worldwide, the majority of them are frost sensitive. The recent creation of frost-tolerant hybrids such as Eucalyptus gundal plants (E. gunnii × E. dalrympleana hybrids), now enables the development of industrial plantations in northern countries. Our objective was to evaluate the impact of cold on the wood structure and composition of these hybrids, and on the biosynthetic and regulatory processes controlling their secondary cell-wall (SCW) formation. We used an integrated approach combining histology, biochemical characterization and transcriptomic profiling as well as gene co-expression analyses to investigate xylem tissues from Eucalyptus hybrids exposed to cold conditions. Chilling temperatures triggered the deposition of thicker and more lignified xylem cell walls as well as regulation at the transcriptional level of SCW genes. Most genes involved in lignin biosynthesis, except those specifically dedicated to syringyl unit biosynthesis, were up-regulated. The construction of a co-expression network enabled the identification of both known and potential new SCW transcription factors, induced by cold stress. These regulators at the crossroads between cold signalling and SCW formation are promising candidates for functional studies since they may contribute to the tolerance of E. gunnii × E. dalrympleana hybrids to cold.
Assuntos

Texto completo: 1 Coleções: 01-internacional Base de dados: MEDLINE Assunto principal: Temperatura Baixa / Regulação da Expressão Gênica de Plantas / Eucalyptus / Xilema Tipo de estudo: Prognostic_studies Idioma: En Revista: Tree Physiol Assunto da revista: BOTANICA / FISIOLOGIA Ano de publicação: 2018 Tipo de documento: Article País de afiliação: França

Texto completo: 1 Coleções: 01-internacional Base de dados: MEDLINE Assunto principal: Temperatura Baixa / Regulação da Expressão Gênica de Plantas / Eucalyptus / Xilema Tipo de estudo: Prognostic_studies Idioma: En Revista: Tree Physiol Assunto da revista: BOTANICA / FISIOLOGIA Ano de publicação: 2018 Tipo de documento: Article País de afiliação: França