Involved in strigolactone (SL) signaling pathway. May function downstream of SL synthesis, as a component of hormone signaling or as an enzyme that participates in the conversion of SL to the bioactive form. Strigolactones are hormones that inhibit tillering and shoot branching through the MAX-dependent pathway, contribute to the regulation of shoot architectural response to phosphate-limiting conditions and function as rhizosphere signal that stimulates hyphal branching of arbuscular mycorrhizal fungi and trigger seed germination of root parasitic weeds (PubMed:19579033, PubMed:19542179, PubMed:23301669). Strigolactone-dependent association of D14 with D3 and D53 (a repressor of SL signaling) triggers D53 ubiquitination and degradation (PubMed:24336200, PubMed:24616269). Hydrolyzes the butenolide ring of SLs (PubMed:23381136, PubMed:24131983). A reaction product D-OH is trapped in the cavity of D14, inducing the interaction with SLR1, and probably with other proteins such as D3 and D53 (PubMed:24131983). Contributes to the negative regulation of gibberellin signaling (PubMed:24131983). Interacts with D53 (PubMed:24336200, PubMed:24336215, PubMed:25713176). The interaction between D53 and D14 is enhanced in the presence of strigolactones (PubMed:24336200, PubMed:24336215). The interaction with D53 occurs in the presence of (2'R) stereoisomers of strigolactones, but not (2'S) stereoisomers (PubMed:25713176). Interacts with SLR1 in a strigolactone-dependent manner (PubMed:24131983). Interacts with D3 in a strigolactone-dependent manner (PubMed:24336200, PubMed:24336215, PubMed:24616269). The interaction between D14 and SLR1 takes place in the nucleus (PubMed:24131983). The interaction between D14 and D3 takes place in the nucleus (PubMed:24616269). Expressed in the parenchyma cells of the root stele and lateral roots, vascular tissues of vein and leaf sheath, ligule base, auricle base and stem base. Increased number of tillers, reduced plant height, and elevated levels of strigolactones. Belongs to the AB hydrolase superfamily.