Involved in the oxidative degradation of abscisic acid. 2-cis-(+)-abscisate + O2 + reduced [NADPH--hemoprotein reductase] = (+)-8'-hydroxyabscisate + H(+) + H2O + oxidized [NADPH--hemoprotein reductase] Plant hormone degradation; abscisic acid degradation. Not induced by ethylene treatment or flooding. Belongs to the cytochrome P450 family.