Assessment of decay risk of airborne wood-decay fungi II: relation between isolated fungi and decay risk |
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Authors: | Ikuo Momohara Yuko Ota Kozue Sotome Takeshi Nishimura |
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Institution: | (1) Forestry and Forest Products Research Institute, Matsunosato-1, Tsukuba Ibaraki, 305-8687, Japan;(2) Fungus/Mushroom Resource and Research Center, Tottori University, 4-101 Koyama-Minami, Tottori 680-8553, Japan |
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Abstract: | The relationship between the taxa of airborne fungi and the decay risk was investigated. Airborne fungi in 1,000 l of air
were trapped on Japanese cedar disks, and incubated in a damp container kept at 26oC. After 16-week incubation, filamentous
fungi grown on the disks were isolated and DNA extracted from each isolate was amplified with the primers ITS4/ITS5. The DNA
sequences of the amplified products were determined and compared to the sequence data of GenBank to determine the species
or genus according to a BLAST search. This search revealed that the isolate consisted of 5 major taxa, namely Bjerkandera sp., Phanerochaete sp. (A), Phanerochaete sp. (B), Polyporales sp. Polyporus arcularius, and 6 minor ones. Statistical analysis revealed that the major taxa were trapped on the disks in similar weather conditions
except for Bjerkandera sp., which was trapped at a cooler temperature. The analysis also proved the disks to which Phanerochaete spp. or Polyporales sp. were attached showed higher mass loss. It is concluded that, under these experimental conditions, related species of
Phanerochaete sordida play an important role in increasing the decay risk caused by airborne wood-decay fungi. |
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