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

AbstractHeat shock proteins play important roles in regulating plant growth and development and participating in response to abiotic stresses. However, the role ofHsp90gene family in potato (Solanum tuberosum L.) is yet to be known. In the present study, 9StHsp90s were identified in the potato genome. They were unevenly distributed on 7 chromosomes. Phylogenetic analysis divided theStHsp90s into four subfamilies (Class I–V). Real-time quantitative reverse transcriptase–polymerase chain reaction (RT-qPCR) results detected that 9StHsp90s responded differently to drought stresses. Three genes(PG0022159,PG1006147andPG0019647)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 potatoHsp90gene family and lays a foundation for further analysis of theStHsp90functions on plant development and stress response.