Evaluation of gene expression of 14-3-3 genes under drought stress in potato

Document Type : Research Paper

Authors

1 Ph.D. Student, Department of Plant Sciences and Biotechnology, Faculty of Life Sciences and Biotechnology, Shahid Beheshti University, Tehran, Iran.

2 Professor, Department of Plant Sciences and Biotechnology, Faculty of Life Sciences and Biotechnology, Shahid Beheshti University, Tehran, Iran.

Abstract

Objective
Potato (Solanum tuberosum) is an important food and economic crop in the world. However, potato shows susceptibility to drought stress. Thus, the investigation of the molecular mechanism of drought stress tolerance is essential considered. GF14/14-3-3 protein is one of the conserved dimeric proteins that regulate several cellular processes, ranging from metabolism to transport, growth, development, and stress response. However, only a few reports are available regarding the effect of 14-3-3 genes in response to stress in potatoes.
 
Materials and methods
In this study, twelve 14-3-3 genes were detected in the potato genome using bioinformatics methods.  Further, motif analysis, gene structure, phylogenetic analysis, TFBS, and synteny analysis were performed on the 14-3-3 genes. In addition, the expression analysis of two genes (StGF14i and StGF14h) in four tissues (root, stem, leaf, and tuber) and their expression under drought stress in the greenhouse was investigated.  
 
Results
Based on phylogenetic relationships, the StGF14 family members were categorized into two classes. Analysis of transcription factor binding sites (TFBS) in the promoter region of 14-3-3 genes revealed that the highest and the lowest number of TFBs were MYB and CSD, respectively, were found in the promoters of 14-3-3 genes. Moreover, different frequencies of TFSB in 14-3-3 genes could indicate that these genes control different developmental stages and are involved in complex regulatory mechanisms. Furthermore, the genome evolution of S. tuberosum using orthologs and paralogues identification was studied. The number of exons in 14-3-3 genes was from four to seven and most of these genes in the same subfamily had the same exon-intron patterns. The expression of two genes in leaves and tuber under drought stress as well as the gene expression of both genes in root, stem, leaf, and tuber tissues under drought were examined. Based on the expression analysis of two genes StGF14i and StGF14h in tissues and a survey of drought stress, the StGF14i gene has the maximum expression in four tissues and also, the highest expression in tubers under drought stress. Our results revealed that two orthologous gene pairs between S. tuberosum and A. thaliana as well as eight paralogous genes among potato genomes were identified.
 
Conclusions
The expression patterns of StGF14i and StGF14h genes in different tissues and in response to drought stress that two genes had the conserved and necessary roles in potato growth and development potato. It is hoped that the results of this study will be useful for further investigation of the functional role and molecular mechanisms of 14-3-3 genes in response to drought stresses.

Keywords

References

 
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Agricultural Biotechnology Journal
Volume 14, Issue 3
September 2022
Pages 63-82

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