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The CBF1-dependent low temperature signalling pathway, regulon and increase in freeze tolerance are conserved in Populus spp

Benedict, Catherine (author)
Umeå universitet,Umeå Plant Science Centre (UPSC)
Skinner, Jeffrey S (author)
Meng, Rengong (author)
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Chang, Yongjian (author)
Bhalerao, Rishikesh (author)
Umeå universitet,Umeå Plant Science Centre (UPSC)
Huner, Norman P A (author)
Finn, Chad E (author)
Chen, Tony H H (author)
Hurry, Vaughan (author)
Umeå universitet,Institutionen för fysiologisk botanik,Umeå Plant Science Centre (UPSC)
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 (creator_code:org_t)
Oxford : Blackwell Scientific Publications Ltd, 2006
2006
English.
In: Plant, Cell and Environment. - Oxford : Blackwell Scientific Publications Ltd. - 0140-7791 .- 1365-3040. ; 29:7, s. 1259-1272
Related links:
http://www.ncbi.nlm....
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https://urn.kb.se/re...
https://doi.org/10.1...
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  • Journal article (peer-reviewed)
Abstract Subject headings
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  • The meristematic tissues of temperate woody perennials must acclimate to freezing temperatures to survive the winter and resume growth the following year. To determine whether the C-repeat binding factor (CBF) family of transcription factors contributing to this process in annual herbaceous species also functions in woody perennials, we investigated the changes in phenotype and transcript profile of transgenic Populus constitutively expressing CBF1 from Arabidopsis (AtCBF1). Ectopic expression of AtCBF1 was sufficient to significantly increase the freezing tolerance of non-acclimated leaves and stems relative to wild-type plants. cDNA microarray experiments identified genes up-regulated by ectopic AtCBF1 expression in Populus, demonstrated a strong conservation of the CBF regulon between Populus and Arabidopsis and identified differences between leaf and stem regulons. We studied the induction kinetics and tissue specificity of four CBF paralogues identified from the Populus balsamifera subsp. trichocarpa genome sequence (PtCBFs). All four PtCBFs are cold-inducible in leaves, but only PtCBF1 and PtCBF3 show significant induction in stems. Our results suggest that the central role played by the CBF family of transcriptional activators in cold acclimation of Arabidopsis has been maintained in Populus. However, the differential expression of the PtCBFs and differing clusters of CBF-responsive genes in annual (leaf) and perennial (stem) tissues suggest that the perennial-driven evolution of winter dormancy may have given rise to specific roles for these 'master-switches' in the different annual and perennial tissues of woody species.

Keyword

abscisic acid/metabolism
adaptation; physiological
amino acid sequence
arabidopsis/metabolism
arabidopsis proteins/chemistry/genetics/*metabolism
cluster analysis
dna-binding proteins/chemistry/genetics/*metabolism
freezing
gene expression regulation; plant
genes; plant/genetics
genome; plant/genetics
microarray analysis
molecular sequence data
natural disasters
plant leaves/physiology
plant stems/physiology
plants; genetically modified
populus/genetics/*metabolism/physiology
regulon/*genetics
response elements/genetics
signal transduction
trans-activators/chemistry/genetics/*metabolism
transcription factors/metabolism
up-regulation/genetics

Publication and Content Type

ref (subject category)
art (subject category)

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