Experimental method to quantify progressive stages of decay of wood by basidiomycete fungi

被引:63
作者
Curling, SF [1 ]
Clausen, CA [1 ]
Winandy, JR [1 ]
机构
[1] USDA, Forest Serv, Forest Prod Lab, Madison, WI USA
关键词
incipient decay; test method; strength testing; brown-rot decay; white-rot decay; Gloeophyllum trabeum; Oligoporus placentus; Trametes (Coriolus) versicolor;
D O I
10.1016/S0964-8305(01)00101-9
中图分类号
Q81 [生物工程学(生物技术)]; Q93 [微生物学];
学科分类号
071005 ; 0836 ; 090102 ; 100705 ;
摘要
A biological exposure method was developed that allows wood samples to be progressively removed for monitoring colonization and decay by basidiomycete fungi. Monitoring involves strength tests, determination of weight loss, and chemical analysis. To optimize the procedure, several variations of the method were tested using two species of brown-rot fungi (Gloeophyllum trabeum and Oligoporus placentus (Postia placenta)) and one white-rot species (Trametes versicolor) against southern pine sapwood. The variations involved type of culture medium and exposure method. All variations enabled substantial and rapid decay. Specimens exposed to brown-rot fungi lost 80-100% strength and 25-40% weight after 12 weeks; the white-rot fungus was less effective, but nevertheless caused 20-40% loss in strength. For both brown- and white-rot fungi, strength loss exceeded weight loss. For brown-rot fungi, there was a direct relationship between strength loss and weight loss, suggesting a quantitative relationship between strength loss and chemical composition (hemicellulose sugars) during incipient decay of southern pine by these fungi. Published by Elsevier Science Ltd.
引用
收藏
页码:13 / 19
页数:7
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