Catalyzes the C-6 beta-hydroxylation of beta-amyrin to form daturadiol (PubMed:28194155). Catalyzes the C-6 beta-hydroxylation of alpha-amyrin to form 6-beta-hydroxy-alpha-amyrin (PubMed:28194155). beta-amyrin + O2 + reduced [NADPH--hemoprotein reductase] = daturadiol + H(+) + H2O + oxidized [NADPH--hemoprotein reductase] Specifically expressed in roots. Belongs to the cytochrome P450 family.