Laccases are ubiquitous oxidases present in animals, plants, bacteria, and fungi. In plant species, they occur as large multigenic families. The involvement of peroxidases in lignification is supported by a wealth of literature data. In contrast, the role of laccases in this major plant process is less firmly established. The large number of plant laccases, which argues for a variety of functions in plant development, makes the identification of lignin-specific laccases a challenge. However, in the past decade, the development of new genetic technologies and tools has played a central role towards resolving this issue. In addition, the plant model, Arabidopsis thaliana, has recently provided novel insights about the occurrence of laccases involved in stem lignification. Information about lignin-related laccases is also available from other species, such as poplar, or other organs and tissues, such as seed coats. This review brings a short and cutting edge survey of laccases and lignification.

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