Scanning electron microscopy image of lignin fusion with cellulose fibers and wood cells immersed in it, in direct contact with little alterd wood surface in rotational wood dowels bonding.

• 木质素在木材等硬组织中含量较多，蔬菜中则很少见含有。一般存在于豆类、麦麸、可可、巧克力、草莓及山莓的种子部分之中。