Functions as flavanone 2-hydroxylase that catalyzes the direct conversion of flavanones to 2-hydroxyflavanones (PubMed:20647377). In vitro, can convert naringenin and eriodictyol to the corresponding 2-hydroxyflavanones (PubMed:20647377). Generates 2-hydroxyflavanone substrates for C-glycosylflavone biosynthesis by the glycosyltransferase CGT (PubMed:20647377). a flavanone + O2 + reduced [NADPH--hemoprotein reductase] = a 2-hydroxyflavanone + H(+) + H2O + oxidized [NADPH--hemoprotein reductase] (2S)-naringenin + O2 + reduced [NADPH--hemoprotein reductase] = (2S)-2-hydroxynaringenin + H(+) + H2O + oxidized [NADPH--hemoprotein reductase] (S)-eriodictyol + O2 + reduced [NADPH--hemoprotein reductase] = (2S)-2-hydroxyeriodictyol + H(+) + H2O + oxidized [NADPH--hemoprotein reductase] Secondary metabolite biosynthesis; flavonoid biosynthesis. Belongs to the cytochrome P450 family.