Comparative analysis of Heat shock transcription factor in Solanum tuberosum and Solanum lycopersicum

SHUBHENDRA SINGH CHAUHAN; SHIKHA MITTAL; PRAGATI MISRA

Volume : V, Issue : IX, September - 2016

Comparative analysis of Heat shock transcription factor in Solanum tuberosum and Solanum lycopersicum

Shubhendra Singh Chauhan, Shikha Mittal, Pragati Misra

Abstract :

Heat shock transcription factors are one of the important transcription factors involved in heat stress and several other abiotic stresses like drought and cold. HSF regulates expression of HSPs and controls high temperature stress, damage and biological process. In this study we identified the HSF genes in potato and tomato and compared their gene structure, evolutionary relationship, motif and domains with the help of several bioinformatics software. 17 members of potato and 24 members of tomato were identified from Plant Transcription Factor database. Potato and tomato genes were distributed unevenly in 9 and 10 chromosomes of 12 chromosomes respectively. In terms of Gene structure, potato HSF genes retain 1 intron except 2 genes while in tomato 9.3% of genes consist 2 intron which suggests gain of intron during evolutionary process. Comparative phylogenetic analysis of HSF genes revealed 4 groups with several orthologous and paralogous genes. Conserved domains and cis–regulatory elements were also searched for both species of solaneaceae family. Segmental duplications were found to be involved in family expansion and evolution. Our comparative study may be helpful in understanding of HSF genes in solaneaceae family and evolutionary pathways of HSFs in potato and tomato.