Journal
PLANT SCIENCE
Volume 180, Issue 1, Pages 39-45Publisher
ELSEVIER IRELAND LTD
DOI: 10.1016/j.plantsci.2010.08.012
Keywords
Poaceae; Low-temperature tolerance; CBF/DREB1; FR-2
Categories
Funding
- BBSRC [BB/E024726/1 (EXBARDIV)]
- Fondazione Cassa di Risparmio di Modena, Progetto di Ricerca Internazionale FROSTMAP Physical mapping of the barley Frost resistance-H2 (Fr-H2) locus
- BBSRC [BB/E024726/1] Funding Source: UKRI
- Biotechnology and Biological Sciences Research Council [BB/E024726/1] Funding Source: researchfish
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Several molecular evidences have been gathered in Poaceae that point out a central role of the CBF/DREB1 transcription factors in the signal transduction pathways leading to low-temperature tolerance, although to a quite different extent between crops originating from either temperate or tropical climates. A common feature of the CBF/DREB1 genes in Poaceae is their structural organization at the genome level in clusters of tandemly duplicated genes. In temperate cereals such as barley and wheat, expansion of specific multigene phylogenetic clades of CBFs that map at the Frost Resistance-2 locus has been exclusively observed. In addition, copy number variants of CBF genes between frost resistant and frost sensitive genotypes raise the question if multiple copies of the CBF/DREB1s are required to ensure freezing tolerance. On the other hand, in crops of tropical origin such as rice and maize, a smaller or less-responsive CBF regulon may have evolved, and different mechanisms might determine chilling tolerance. In this review, recent advances on the organization and diversity at the CBF cluster locus in the grasses are provided and discussed. (C) 2010 Elsevier Ireland Ltd. All rights reserved.
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