High affinity abscisic acid (ABA) transporter that mediates the import of ABA, with a preference for (+)-ABA, through the plasma membrane, especially in guard cells, and is involved in the intercellular and intracellular ABA signaling pathways leading, for example, to stomatal closure, thus conferring drought tolerance (PubMed:20935463, PubMed:20133880, PubMed:26517905). Together with ABCG30, import into the embryo the ABA delivered from the endosperm via ABCG25 and ABCG31-mediated export to suppress radicle extension and subsequent embryonic growth (PubMed:26334616). May be a general defense protein (By similarity). Functions as a pump to exclude Pb(2+) ions and/or Pb(2+)-containing toxic compounds from the cytoplasm. Contributes to Pb(2+) ions resistance. Confers some resistance to the terpene sclareol (PubMed:14526118, PubMed:15923333). (Microbial infection) Involved in resistance response to the pathogenic oomycetes Phytophthora infestans and Phytophthora capsici. abscisate(out) + ATP + H2O = abscisate(in) + ADP + H(+) + phosphate Inhibited by glibenclamide, verapamil and vanadate (ABC transporters inhibitors). Interacts with LECRK91 and LECRK92. Mostly observed in inflorescence meristems relative to cauline leaves and developing siliques (PubMed:22525244). Ubiquitous with higher levels in leaves, stems and flowers (PubMed:12430018, PubMed:14526118, PubMed:15923333, PubMed:20133880). Also present in primary and lateral roots (PubMed:20133880). In seeds, mainly expressed in the embryo and, to a lesser extent, in the endosperm (PubMed:26334616). In leaves, mostly observed in guard cells. Circadian-regulation. Expression increase during the dark phase and decrease during the light phase. Induced by cycloheximide (CHX), sclareol, and heavy metals such as Pb(2+) ions. ETR1-, EIN2-, JAR1-, NPR1- and EDS5-dependent induction by incompatible fungal pathogens (A.brassicicola), by compatible fungal pathogens (S.sclerotiorum and F.oxysporum), and by compatible bacterial pathogens (P.syringae pv tomato). Also induced by phytohormones such as salicylic acid (SA), methyl jasmonate (MeJA) and ethylene. Induced by abscisic acid (ABA) treatment and drought via a WRKY1-mediated regulation (PubMed:20133880, PubMed:26820136). In cauline leaves, activated by cold stress, but repressed by heat stress (PubMed:22525244). Within inflorescence meristems, down-regulated by both cold and heat stress treatments (PubMed:22525244). In developing siliques, activated by cold stress, but unaffected by heat stress (PubMed:22525244). Increased susceptibility to the oomycetes Phytophthora brassicae and Phytophthora capsici (PubMed:26011556). Decreased abscisic acid (ABA) uptake through the plasma membrane and strongly delayed up-regulation of ABA responsive genes (e.g. NCED3, ABR1 and RD29B), and associated with a slow stomatal closure in response to ABA and osmotic stress resulting in reduced drought tolerance (PubMed:20133880). Impairment in ABA regulation of seed germination and root development (PubMed:20133880). Early seeds germination on imbibition without stratification, and reduced abscisic acid (ABA)-mediated inhibition of seeds germination (PubMed:26334616). Belongs to the ABC transporter superfamily. ABCG family. PDR (TC 3.A.1.205) subfamily.