Screening and Preliminary Degradation Mechanism of White Rot Fungi Strain of Dendrocalamus sinicus

In order to obtain high efficient degradation strains of Dendrocalamus sinicus, this study employed the solid fermentation method and chemical determination method to screen the strains that could degrade lignin efficiently. The strains were identified by combining morphology with molecular method. The degradation types were revealed by principal component analysis. Ultraviolet scanning was used to reveal the initial degradation mechanism of lignin. The results showed that the strain SWFU000072 of Cerrena zonata was selected from 30 white rot fungi to degrade lignin efficiently. The strain had strong selective degradation of lignin and caused little loss of synthetic cellulose. There were 3 degradation types in 30 strains of white rot fungi: selective degradation of lignin, selective degradation of synthetic cellulose, and intense selective degradation of synthetic cellulose. The ethanol extract of the 3 white rot fungi showed unobvious absorption peak at 260 nm, indicating that the aromatic ring structure in lignin was destroyed, thus it revealed that the white rot fungi could degrade lignin efficiently by destroying the aromatic ring structure in lignin.