Together with ABCG40, import into the embryo the abscisic acid (ABA) delivered from the endosperm via ABCG25 and ABCG31-mediated export to suppress radicle extension and subsequent embryonic growth (PubMed:26334616). Involved in root secretion of phytochemicals (phenolics and sugars) which regulate soil microbiota, influencing both fungal and bacterial communities (PubMed:19854857). May be a general defense protein (By similarity). abscisate(out) + ATP + H2O = abscisate(in) + ADP + H(+) + phosphate Confined to roots (PubMed:12430018). In seeds, mainly expressed in the embryo and, to a lesser extent, in the endosperm (PubMed:26334616). Repressed by cold/dark treatment. Early seeds germination on imbibition without stratification, and reduced abscisic acid (ABA)-mediated inhibition of stratified seeds germination (PubMed:26334616). Altered root exudation of phytochemicals, with increased phenolics (e.g. benzoic acid, salicylic acid, syringic acid, tartaric acid, lactic acid, alpha-linolenic acid, cyanidin, sinapoyl malate, valine and indole 3-acetic acid) and decreased sugars levels (e.g. raffinose, glucose, fructose and mannitol), leading to an overhaul of natural soil microbiota, including both fungal and bacterial communities; this phenotype is associated with an up-regulation of some genes involved in biosynthesis and transport of secondary metabolites, but the down-regulation of some sugar transporters (PubMed:19854857). Belongs to the ABC transporter superfamily. ABCG family. PDR (TC 3.A.1.205) subfamily. Was originally thought to correspond to two different genes At4g15220 and At4g15230. Was originally thought to correspond to two different genes At4g15220 and At4g15230. Was originally thought to correspond to two different genes At4g15220 and At4g15230. Was originally thought to correspond to two different genes At4g15220 and At4g15230.