Functions as a multidrug and toxin extrusion transporter in the export of abscisic acid (ABA) in guard cells. Plays a role in ABA-mediated growth inhibition and responses to drought conditions (PubMed:24851876). May act as a negative regulator of hypocotyl cell elongation in the light (PubMed:26160579). Preferentially expressed in rosette leaves. Detected mainly in the vascular tissues and guard cells (PubMed:24851876). Mostly detected at reproductive stages in young anthers, in mature pollens and during pollen germination on the pistil. Also expressed in developing seeds (PubMed:26160579). By abscisic acid. Smaller and yellowish rosette leaves. Enhanced sensitivity to abscisic acid (ABA) in growth inhibition and seed germination. Accumulation of ABA in leaves. Enhanced tolerance to drought with lower stomatal conductance. Overexpression of DTX50 alters shoot developmental programs leading to a loss of apical dominance phenotype. Belongs to the multi antimicrobial extrusion (MATE) (TC 2.A.66.1) family.