Comparative analyses reveal potential uses of Brachypodium distachyon as a model for cold stress responses in temperate grasses.

BMC Plant Biology
Chuan LiSimen R Sandve

Abstract

Little is known about the potential of Brachypodium distachyon as a model for low temperature stress responses in Pooideae. The ice recrystallization inhibition protein (IRIP) genes, fructosyltransferase (FST) genes, and many C-repeat binding factor (CBF) genes are Pooideae specific and important in low temperature responses. Here we used comparative analyses to study conservation and evolution of these gene families in B. distachyon to better understand its potential as a model species for agriculturally important temperate grasses. Brachypodium distachyon contains cold responsive IRIP genes which have evolved through Brachypodium specific gene family expansions. A large cold responsive CBF3 subfamily was identified in B. distachyon, while CBF4 homologs are absent from the genome. No B. distachyon FST gene homologs encode typical core Pooideae FST-motifs and low temperature induced fructan accumulation was dramatically different in B. distachyon compared to core Pooideae species. We conclude that B. distachyon can serve as an interesting model for specific molecular mechanisms involved in low temperature responses in core Pooideae species. However, the evolutionary history of key genes involved in low temperature responses has...Continue Reading

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Datasets Mentioned

BETA
EU680850
EU680851
JQ180470
JQ180471

Methods Mentioned

BETA
PCR
transgenic

Software Mentioned

Perl scripts
blast
AGCC
Robust Multi - array Analysis ( RMA )
BioEdit
apt
Affymetrix
probeset
Primer Express
Treefinder

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