Lignification in Trees: Indication of Exclusive Peroxidase Participation

Science  20 Apr 1973:
Vol. 180, Issue 4083, pp. 296-298
DOI: 10.1126/science.180.4083.296


Syringaldazine did not turn purple on cross sections of tree branches or saplings or on cambial tissue cultures unless hydrogen peroxide was added; this indicated the absence of laccase but presence of peroxidase in lignifying cells. Peroxidase, therefore, apparently is the only en enzyme that polymerizes p-coumaryl alcohols to lignin in trees.