Tree Genetics & Genomes

, Volume 6, Issue 4, pp 601–611 | Cite as

Multivariate analysis of digital gene expression profiles identifies a xylem signature of the vascular tissue of white spruce (Picea glauca)

  • Rokneddin Albouyeh
  • Nima Farzaneh
  • Jörg Bohlmann
  • Kermit Ritland
Original Paper

Abstract

A collection of cDNA libraries from white spruce (Picea glauca) and interior spruce (P. glauca × engelmanii) vascular tissue were analyzed to identify a set of genes that could serve as tissue-related markers within the coniferous vascular system. Multivariate exploratory methods identified up to 128 genes co-expressed similarly among three xylem libraries. The majority (87) of these genes formed three distinctive meta-clusters, denoting putative gene cliques in xylem tissue. Of the selected genes, 33 (25%) exhibited no significant sequence homology in queries against any public databases, indicating the possibility of their unique expression in the xylem tissue of conifers. Another 38 genes (30%) had ambiguous annotation. Validation of the annotated genes with analog data, obtained from a wet-lab study utilizing microarray slides with 18,881 spots, resulted in a screened list of 29 genes as xylem-related markers. Response to stress was the predominant category to which the screened genes corresponded. Among the screened genes, elements of the phenolics biosynthesis, cinnamyl alcohol dehydrogenase and laccase, together with the fundamental enzyme of the cell wall biosynthesis, cellulose synthase, prominently delineated characteristics of the wood-forming tissue, xylem.

Keywords

Conifer EST Digital gene expression Spruce Vascular tissue Xylem 

Supplementary material

11295_2010_275_MOESM1_ESM.doc (147 kb)
Supplement 1(DOC 147 kb)
11295_2010_275_MOESM2_ESM.xls (333 kb)
Supplement 2(DOC 333 kb)
11295_2010_275_MOESM3_ESM.doc (172 kb)
Supplement 3(DOC 172 kb)

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Copyright information

© Springer-Verlag 2010

Authors and Affiliations

  • Rokneddin Albouyeh
    • 1
  • Nima Farzaneh
    • 1
  • Jörg Bohlmann
    • 1
    • 2
    • 3
  • Kermit Ritland
    • 1
  1. 1.Department of Forest SciencesUniversity of British ColumbiaVancouverCanada
  2. 2.Michael Smith LaboratoriesUniversity of British ColumbiaVancouverCanada
  3. 3.Department of BotanyUniversity of British ColumbiaVancouverCanada

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