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Biological Degradation of Chinese Fir with Trametes Versicolor (L.) Lloyd

1
International Centre for Bamboo and Rattan, Beijing 100102, China
2
Anhui Agricultural University, Hefei 230036, China
3
Qingdao Institute of Bioenergy and Bioprocess Technology, Chinese Academy of Sciences, Qingdao 266101, China
4
Chinese Academy of Forestry, Beijing 100091, China
*
Authors to whom correspondence should be addressed.
Academic Editor: Naozumi Teramoto
Materials 2017, 10(7), 834; https://doi.org/10.3390/ma10070834
Received: 1 May 2017 / Revised: 22 June 2017 / Accepted: 17 July 2017 / Published: 20 July 2017
Chinese fir (Cunninghamia lanceolata (Lamb.) Hook.) has been an important afforestation species in northeast China. It has obvious defects of buckling and cracking easily, which are caused by its chemical components. Trametes versicolor (L.) Lloyd, a white-rot fungus, can decompose the cellulose, hemicellulose, and lignin in the wood. White-rot fungus was used to biologically degrade Chinese fir wood. The effects of different degradation time on the Chinese fir wood’s mechanical properties, micromorphology, chemical components, and crystallinity were studied. The results showed that the heartwood of Chinese fir was more durable than the sapwood and the durability class of Chinese fir was III. Trametes versicolor (L.) Lloyd had a greater influence on the mechanical properties (especially with respect to the modulus of elasticity (MOE)) for the sapwood. Trametes versicolor (L.) Lloyd degraded Chinese fir and colonized the lumen of various wood cell types in Chinese fir, penetrated cell walls via pits, caused erosion troughs and bore holes, and removed all cell layers. The ability of white-rot fungus to change the chemical composition mass fraction for Chinese fir was: hemicellulose > lignin > cellulose. The durability of the chemical compositions was: lignin > cellulose > hemicellulose. The crystallinity of the cellulose decreased and the mean size of the ordered (crystalline) domains increased after being treated by white-rot fungus. View Full-Text
Keywords: Chinese fir; white-rot fungus; mechanical properties; chemical composition; crystallinity Chinese fir; white-rot fungus; mechanical properties; chemical composition; crystallinity
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MDPI and ACS Style

Chen, M.; Wang, C.; Fei, B.; Ma, X.; Zhang, B.; Zhang, S.; Huang, A. Biological Degradation of Chinese Fir with Trametes Versicolor (L.) Lloyd. Materials 2017, 10, 834.

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