Abstract
In the post-genome era, one of the main problems of plant genetics is to identify functions of genes. A massive change in gene expression is an important component of the cold acclimation process [1]. Around one thousand genes have been found to be differentially expressed following cold exposure in the model plant Arabidopsis thaliana. Transcriptional re-programming occurs during cold acclimation to induce expression of around 100 Cold-Regulated (COR) genes, responsible for producing cryoprotective molecules. Central to this transcriptional regulation are the CBF (C-repeat-Binding Factor) genes that encode AP2/ERF family transcription factors [2]. A general scheme of genetic control of cold stress responses can be represented as a network of transcription factors and genes that are directly responsible for morphological changes leading to cold resistance. It is well known that there are two main pathways of cold response: ABA-dependent and ABA-independent. There is also an intersection between abiotic and biotic response pathways as well as between different kinds of abiotic response pathways such as cold, dehydration and high light [3]. However, functions of most cold response genes are still not found. On the other hand, the agricultural range of many important crop species is limited by their maximum freezing tolerance capacity, and freezing stress-related damage can result in considerable crop productivity losses [4].
Citation
Novokreshchenova MG. The Role of Chloroplast Signals in Cold Acclimation in Arabidopsis. SM J Biol. 2016; 2(1): 1007.