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Related Experiment Video

Updated: Jun 3, 2026

Lateral Root Inducible System in Arabidopsis and Maize

Lateral Root Inducible System in Arabidopsis and Maize

Published on: January 14, 2016

Inside the CBF locus in Poaceae.

Alessandro Tondelli¹, Enrico Francia, Delfina Barabaschi

¹CRA-Genomics Research Centre, Fiorenzuola d'Arda, Italy. alessandro.tondelli@entecra.it

Plant Science : an International Journal of Experimental Plant Biology

|March 23, 2011

Summary

CBF/DREB1 transcription factors are key to low-temperature tolerance in grasses. Gene duplication and copy number variations in CBF clusters influence freezing tolerance differently in temperate versus tropical crops.

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Area of Science:

Plant molecular biology
Genetics
Crop science

Background:

CBF/DREB1 transcription factors play a crucial role in plant cold stress response.
Gene organization and diversity within grass species (Poaceae) are critical for understanding low-temperature tolerance.

Purpose of the Study:

To review recent advances in the organization and diversity of CBF/DREB1 gene clusters in grasses.
To discuss the role of CBF/DREB1 gene evolution in differential low-temperature tolerance between temperate and tropical crops.

Main Methods:

Literature review of molecular and genetic studies on CBF/DREB1 genes in Poaceae.
Comparative analysis of CBF gene cluster organization and copy number variation across different grass species.

Main Results:

CBF/DREB1 genes in Poaceae are organized in tandemly duplicated clusters.
Temperate cereals (barley, wheat) show expansion of specific CBF clades at the Frost Resistance-2 locus.
Tropical crops (rice, maize) may possess smaller or less responsive CBF regulons, suggesting alternative chilling tolerance mechanisms.

Conclusions:

The expansion and copy number variation of CBF/DREB1 genes are significant factors in freezing tolerance, particularly in temperate cereals.
Divergent evolution of CBF regulons contributes to differential chilling tolerance strategies in temperate and tropical grasses.