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Long cold exposure induces transcriptional and biochemical remodelling of xylem secondary cell wall in Eucalyptus
- Source :
- Tree Physiology, Tree Physiology, Oxford University Press (OUP): Policy B-Oxford Open Option B, 2018, 38 (3), pp.409-422. ⟨10.1093/treephys/tpx062⟩
- Publication Year :
- 2018
- Publisher :
- HAL CCSD, 2018.
-
Abstract
- 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.
- Subjects :
- 0106 biological sciences
0301 basic medicine
Physiology
Plant Science
Biology
01 natural sciences
Cell wall
Transcriptome
03 medical and health sciences
chemistry.chemical_compound
Cell Wall
Gene Expression Regulation, Plant
Xylem
Botany
Lignin
[SDV.BV]Life Sciences [q-bio]/Vegetal Biology
ComputingMilieux_MISCELLANEOUS
Hybrid
Regulation of gene expression
Eucalyptus
Abiotic stress
Gene Expression Profiling
food and beverages
[SDV.BBM.BM]Life Sciences [q-bio]/Biochemistry, Molecular Biology/Molecular biology
[SDV.BBM.MN]Life Sciences [q-bio]/Biochemistry, Molecular Biology/Molecular Networks [q-bio.MN]
15. Life on land
Cold Temperature
030104 developmental biology
chemistry
Secondary cell wall
010606 plant biology & botany
Subjects
Details
- Language :
- English
- ISSN :
- 0829318X and 17584469
- Database :
- OpenAIRE
- Journal :
- Tree Physiology, Tree Physiology, Oxford University Press (OUP): Policy B-Oxford Open Option B, 2018, 38 (3), pp.409-422. ⟨10.1093/treephys/tpx062⟩
- Accession number :
- edsair.doi.dedup.....3df11be72c41417338db419f49eb20df