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Whirly (Why) transcription factor (TFs) constitute one of the important TF families which plays essential roles in plant metabolism to cope with environmental stresses. In the present study, Why genes were identified at genome-wide scale in tomato (Solanum lycopersicum), and bioinformatics analyses were implemented. Validation of Why genes expressions under drought and salt stresses were also performed using RT-qPCR. The analyses revealed the presence of two Why genes in tomato genome, SlWhy1 (Solyc05g007100.2.1) and SlWhy2 (Solyc11g044750.1.1). Both genes contained Whirly transcription factor domain structure (PF08536), and Why proteins were in basic character (pI ≥ 7). While the lengths of the proteins ranged from 268 to 236 amino acid residues for SlWhy1 and SlWhy2 respectively, exon numbers identified in both genes were seven. According to the digital expression data …