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Role of CBF/DRFBs in ABA Signalling during Cold Stress in Plants

Abiotic stresses, such as oxidative stress are serious threats to agriculture and the natural status of the environment. Recently, research into the molecular mechanism of stress responses especially on genetic modification in plants for stress tolerance has been started and it showing promising results once applies to agriculturally and ecologically important plants. This review examines the different classes of proteins involved in ABA signalling pathway during oxidative stress. The phytohormones ABA is produced by plants under cold and drought stress conditions and plays an important role in mediating stress tolerance. Because cold stress is related to ABA responses, therefore more than 100 genes are up regulated by cold stress, out of which few genes are necessarily need to be associated with cold tolerance. Many cold stress induced genes are activated by transcriptional activators called C-repeat binding factors (CBF; also known as DREB). In response to the cold, multiple regulatory pathways are also activated in plants. They involved several other transcription factors like: ICE1 (Inducer of CBF Expression 1). ICE1-CBF pathway is critical for the regulation of the cold-responsive transcriptome and acquired freezing tolerance.


Gunjan Garg, Durvesh Kumar

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