Systematic Analysis of Galactinol Synthase and Raffinose Synthase Gene Families in Potato and Their Expression Patterns in Development and Abiotic Stress Responses

Raffinose family oligosaccharides (RFOs) are very important for plant growth, development, and abiotic stress tolerance. Galactinol synthase (GolS) raffinose (RFS) critical enzymes involved in RFO biosynthesis. However, the whole-genome identification responses of their coding genes potato remain unexplored. In this study, four StGolS nine StRFS were identified classified into three five subgroups, respectively. Remarkably, a total two to form collinear pairs with those both Arabidopsis tomato, Subsequent analysis revealed that StGolS4 exhibited significantly high expression levels transport-related tissues, PEG-6000, ABA treatments, remarkable upregulation under salt stress. Additionally, StRFS5 showed similar StGolS4, but StRFS4 StRFS8 gene increased treatment decreased PEG-6000 treatments. Overall, these results lay foundation further research on functional characteristics molecular mechanisms families response ABA, salt, drought stresses, provide theoretical new resources abiotic-stress-tolerant breeding potato.