Inside the CBF locus in Poaceae.
Inside the CBF locus in Poaceae.
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DOI：
10.1016/j.plantsci.2010.08.012
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发表时间：
2011
期刊：
影响因子：
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通讯作者：
A. Tondelli;E. Francia;D. Barabaschi;M. Pasquariello;N. Pecchioni
中科院分区：
文献类型：
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作者：
A. Tondelli;E. Francia;D. Barabaschi;M. Pasquariello;N. Pecchioni
在禾本科植物中已经收集了一些分子证据，指出CBF/DREB 1转录因子在导致低温耐受性的信号转导途径中的中心作用，尽管在温带或热带气候下的作物之间的程度相当不同。禾本科CBF/DREB 1基因的一个共同特征是它们在基因组水平上以串联重复基因簇的结构组织。在温带谷物，如大麦和小麦，扩展特定的多基因系统发育分支的CBFs映射在抗冻性-2位点已被专门观察到。此外，在抗冻和抗冻敏感基因型之间CBF基因的拷贝数变异提出了一个问题，即是否需要CBF/DREB 1的多个拷贝来确保抗冻性。另一方面，在热带起源的作物如水稻和玉米中，可能已经进化出较小或较不敏感的CBF调节子，并且不同的机制可能决定耐冷性。本文综述了禾本科植物CBF基因簇位点的组织结构和多样性的研究进展。
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.