Lignin degradation and detoxification of lignin-derived products (By similarity). Involved in the flowering time inhibition. 4 hydroquinone + O2 = 4 benzosemiquinone + 2 H2O Binds 4 Cu cations per monomer. Predominantly expressed in tissues other than the inflorescence stem, especially in roots. Expressed along a developmental gradient in the inflorescence stem, with higher levels in olders organs and low levels in young tissues. Belongs to the multicopper oxidase family.