Salinity stress has a negative impact on the growth of plants, which affects homeostasis and productivity. The uptake of non-essential salt ions change the osmotic balance of the cell and cause dehydration. Higher plants develop salt tolerance mechanisms to avoid dehydration. In this project, we isolated and characterized salt tolerance genes in Beta maritima plant. For this purpose, functional genomics technique was used by over expressing cDNAs in yeast and colonies can grow toxic salt media isolated and characterized. We found several colonies and we focused on uncharacterized Pollen-E1 gene with an unknown function. Pollen-E1 cDNA confers salt tolerance to yeast cells. Intracellular sodium measurements of Pollen-E1 overexpressed in yeast cells showed decreased salt levels as compared to wild type suggesting that sodium was transported out of the cell. Pollen-E1 protein localized in endomembrane systems in the yeast cells. In mRNA expression analysis, Pollen-E1 mRNA levels induced immediately in leaves and later stages in root systems under salt stress. Our results showed that is the uncharacterized and unknown function Pollen-E1 gene might have some role of regulating salt tolerance in Beta maritima.