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

文献类型： 外文期刊

第一作者： Li, Chuan

作者： Li, Chuan;Cao, Moju;Li, Chuan;Rudi, Heidi;Fjellheim, Siri;Rognli, Odd Arne;Sandve, Simen R.;Stockinger, Eric J.;Cheng, Hongmei;Fox, Samuel E.;Fox, Samuel E.;Mockler, Todd C.;Westereng, Bjorge

作者机构：

关键词： Brachypodium distachyon;Cold climate adaptation;Ice recrystallization inhibition protein;Gene expression;Fructosyltransferase;C-repeat binding factor;Gene family evolution

期刊名称：BMC PLANT BIOLOGY （ 影响因子：4.215； 五年影响因子：4.96 ）

ISSN： 1471-2229

年卷期： 2012 年 12 卷

页码：

收录情况： SCI

摘要： Background: 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. Results: 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. Conclusions: 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 been different in Brachypodium and core Pooideae species. These differences limit the use of B. distachyon as a model for holistic studies relevant for agricultural core Pooideae species.

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