The objective of this study was to assess the response of the ligninolytic enzymes production during the biodegradation of organotin (IV) complexes-treated of Alstonia scholaris, Macaranga triloba and Hevea brasiliensis. The tropical wood species tested were treated respectively with different levels of monosubstituted organotin (IV) and disubstituted organotin (IV) complexes concentrations (0.1, 0.5 and 1%) and subjected to biodegradation by wood rotting fungi, Trametes versicolor and Gloeophyllum trabeum.

Ligninolytic enzymes profiles of the biodegraded wood showed that manganese peroxidase is the highest enzyme produced and recorded as 26.72 U/mL of the untreated wood and 15.07 U/mL of organotin (IV) treated wood respectively, as compared to lignin peroxidase and laccase. Laccase activity was the least produced among them. Manganese peroxidase is highly expressed indicating that it is most likely to be the predominating enzyme that causing lignin degradation in the biodegraded A. scholaris, M. triloba and H. brasiliensis untreated and organotin (IV) complexes-treated woods. The ligninolytic enzymes activities of dibutyltin (IV)-treated wood were the least determined. Wood densities decreases with the increased in the percentage of weight loss indicating the rapid wood biodegradation occurred. Density reduction of monosubstituted organotin (IV) treated wood was found higher than disubstituted organotin (IV) treated wood. This study shows that the newly synthesized organotin (IV) complexes are effective on reducing the activities of ligninolytic enzyme that plays a vital role in the biodegradation of wood. Dibutyltin (IV) complex is found to affect