Technologies for the production of biothanol are receiving increased attention around the world owing to concerns over the global warming.Lignocellulosic biomass is a great potential resource for the production of biofuels because it is largely abundant,inexpensive and renewable organic material.Significant efforts,many of which have been successful,have been made to convert these lignocellulosic biomass to valuable products,such as biofuels.Sustainable development in lignocellulosic bioethanol production has major challenge due to high cost of production.There are several issues such as efficient utilization of pentose sugars present in lignocelluloses,economical production of lignocellulolytic enzymes with high specificity,cost-effective pre-treatment of lignocellulosic biomass,etc.Genetically modified yeast strains have been approached to utilize pentose and hexose sugars for bioethanol production.However,these strains showed limited xylose consumption.Saccharomyces cerevisiae rely on the capacity of endogenous hexose transporters for xylose uptake,since S.cerevisiae lacks a xylose-specific transport system.Hence,there are several strategies that have been applied to engineer the yeasts which could improve the xylose transportation.latest advancements in S.cerevisiae xylose transporter genes were discussed.