Co-expression network of secondary cell wall biogenesis genes in Eucalyptus tereticornis

Author:

Dharanishanthi Veeramuthu1,Dasgupta Modhumita Ghosh1

Affiliation:

1. Division of Plant Biotechnology, Institute of Forest Genetics and Tree Breeding, P.B. No. 1061, R.S. Puram , Coimbato­re-641002, India

Abstract

Abstract The composition of secondary cell wall determines the indust­rially relevant wood properties in tree species. Hence, its bioge­nesis is one of the most extensively studied developmental processes during wood formation. Presently, systems genetics approach is being applied to understand the biological net­works and their interactions operational during secondary development. Genome-scale analyses of secondary cell wall formation were documented and gene regulatory networks were reported in Arabidopsis, poplar, pine, spruce, rice and sug­arcane. In the present study, the expression patterns of 2651 transcripts representing different pathways governing secon­dary development was documented across four genotypes of E. tereticornis. A co-expression network was constructed with 330 nodes and 4512 edges and the degree ranged from 11 to 53. The network documented 75 (22 %) transcription factors with high degree of interaction. Secondary wall associated NAC domain transcription factor (SND2) was identified as the top hub transcript with 53 interactions. The present study revealed that functional homologs regulating secondary cell wall formation are conserved among angiosperms and gym­nosperms.

Publisher

Walter de Gruyter GmbH

Subject

Genetics,Forestry

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