Long-chain fatty alcohol oxidase involved in the omega-oxidation pathway of lipid degradation. a long-chain primary fatty alcohol + O2 = a long-chain fatty aldehyde + H2O2 Mainly expressed in floral buds and apexes. Detected in roots, stems, leaves, flowers and siliques. Highest expression in roots 4 days after germination, then in apexes 7 days after germination. Down-regulated in leaves and apexes by cold stress, but no changes in roots and hypocotyls. The C-terminal part (725-748) is necessary for enzyme activity. Belongs to the GMC oxidoreductase family.