Abstract:

In this study, we performed a preliminary analysis of the decomposition process of Trametes trogii WT-1 to the wood of Populus×euramericana 'Neva' using transmission electron microscopy (SEM) and infrared spectroscopy (IR)technology. The results showed that the lignin content of the wood decomposed decreased radually and the decomposition rate showed a result as fellows: slow- fast- slow law. SEM observision showed that the lignin of poplar wood is decomposed from cell to the middle lamellae, and the parenchyma and rays are decomposed firstly and followed by wood fiber and vessel. IR analysis showed that the lignin structure of poplar 'I-107' was destroyed under WT-1 strains infection. The net structure formed by carbon-carbon bond (—C—C—) among aromatic nucleus of lignin was destroyed. Part of the side chain which belong to the carbonyl groups, CH₂ structure, syringoside and guaiacyl among benzene ring of lignin was decomposed, and the structure of benzene ring has changed obviously.

Key words: Trametes trogii WT-1, Populus×, euramericana 'Neva&rsquo, lignin, SEM, IR