Enables L-ascorbate:sodium symporter activity and L-ascorbic acid transmembrane transporter activity. Involved in several processes, including L-ascorbic acid transmembrane transport; cellular response to ethanol; and positive regulation of dendrite extension. Located in basal plasma membrane and cytoplasm. Is integral component of plasma membrane. Orthologous to human SLC23A2 (solute carrier family 23 member 2). [provided by Alliance of Genome Resources, Apr 2022]