Dear Editor,In plants,the transport of sugars from the site of biosynthesis to the site of utilization or storage relies on sugar transporters located in different subcellular compartments and different vascular cell types.The SWEET sugar transporter family is one such class and is represented by 17 members in Arabidopsis.AtSWEET1 was the first plant SWEET transporter to be characterized;it acts as a glucose uniporter in multiple systems (Chen et al.,2010).