Co-expression network of transcription factors reveal ethylene-responsive element-binding factor as key regulator of wood phenotype in Eucalyptus tereticornis
Suitability of wood biomass for pulp production is dependent on the cellular architecture and composition of secondary cell wall. Presently, systems genetics approach is being employed to understand the molecular basis of trait variation and co-expression network analysis has enabled holistic unders...
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Published in | 3 Biotech Vol. 8; no. 7; pp. 315 - 9 |
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Main Authors | , |
Format | Journal Article |
Language | English |
Published |
Berlin/Heidelberg
Springer Berlin Heidelberg
01.07.2018
Springer Nature B.V |
Subjects | |
Online Access | Get full text |
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Summary: | Suitability of wood biomass for pulp production is dependent on the cellular architecture and composition of secondary cell wall. Presently, systems genetics approach is being employed to understand the molecular basis of trait variation and co-expression network analysis has enabled holistic understanding of complex trait such as secondary development. Transcription factors (TFs) are reported as key regulators of meristematic growth and wood formation. The hierarchical TF network is a multi-layered system which interacts with downstream structural genes involved in biosynthesis of cellulose, hemicelluloses and lignin. Several TFs have been associated with wood formation in tree species such as
Populus, Eucalyptus, Picea
and
Pinus
. However, TF-specific co-expression networks to understand the interaction between these regulators are not reported. In the present study, co-expression network was developed for TFs expressed during wood formation in
Eucalyptus tereticornis
and ethylene-responsive element-binding factor,
EtERF2
, was identified as the major hub transcript which co-expressed with other secondary cell wall biogenesis-specific TFs such as
EtSND2, EtVND1, EtVND4, EtVND6, EtMYB70, EtGRAS
and
EtSCL8
. This study reveals a probable role of ethylene in determining natural variation in wood properties in
Eucalyptus
species. Understanding this transcriptional regulation underpinning the complex bio-processing trait of wood biomass will complement the
Eucalyptus
breeding program through selection of industrially suitable phenotypes by marker-assisted selection. |
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Bibliography: | ObjectType-Article-1 SourceType-Scholarly Journals-1 ObjectType-Feature-2 content type line 23 |
ISSN: | 2190-572X 2190-5738 |
DOI: | 10.1007/s13205-018-1344-6 |