Genome-Wide Identification and Drought stress-induced expression analysis of the Hsp90 gene Family in Potato

Abstract Heat shock proteins play important roles in regulating plant growth and development and participating in response to abiotic stresses. However, the role of Hsp90 gene family in potato (Solanum tuberosum L.) is yet to be known. In the present study, 9 StHsp90 s were identified in the potato genome. They were unevenly distributed on 7 chromosomes. Phylogenetic analysis divided the StHsp90 s into four subfamilies (Class I–V). Real-time quantitative reverse transcriptase–polymerase chain reaction (RT-qPCR) results detected that 9 StHsp90 s responded differently to drought stresses. Three genes( PG0022159 , PG1006147 and PG0019647 )had the higher relative expression level than other genes in flowers, which were 9, 16 and 17 times than that in roots, respectively, suggesting their involvement in tissue-specific pattern. This study presents a comprehensive overview of the potato Hsp90 gene family and lays a foundation for further analysis of the StHsp90 functions on plant development and stress response.