Zohreh Hajibarat, - Department of Plant Sciences and Biotechnology, Faculty of Life sciences and Biotechnology, Shahid Beheshti University, G.C, Tehran, Iran.
Abbas Saidi, - Department of Plant Sciences and Biotechnology, Faculty of Life sciences and Biotechnology, Shahid Beheshti University, G.C, Tehran, Iran.
Zahra Hajibarat - Department of Plant Sciences and Biotechnology, Faculty of Life sciences and Biotechnology, Shahid Beheshti University, G.C, Tehran, Iran.

Auxin response factors (ARF) are key players in plant growth and development. Arabidopsis thaliana is as a model species for studying plant biology. An extensive bioinformatics analysis including analysis of the protein-protein interaction, conserved motifs, chromosomal map, and phylogenetic relationships were performed for the Arabidopsis ARF gene family. In this study, a set of 22 ARF gene Arabidopsis that identified and categorized into three groups (Class I, II, and III). ARF genes have been studied by molecular methods in several different plant species however to better understand the mechanisms of these proteins more studies are needed. Study of the amino acid composition revealed that totally in all groups, alanine and proline were the most frequent residues while cysteine had the lowest frequency. Chromosomal map showed that the many of genes were distributed on chromosomes. The aims of the present study were to obtain genomic information for the AtARF gene family and to study phylogenic relationships among genes.

Arabidopsis, Gene family, Auxin, ARF gene