• Journal of the Korean Wood Science and Technology
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• 제48권1호
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• pp.50-60
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• 2020

Fungi are wood-decaying organisms, and this is an important trait that should be considered in wood utilization. When fungi attack wood, it decreases the quality of the wood. The use of metal screws has become an important part of woodworking. The ability of fungi to decay wood and damage metal screws that are embedded into wood is varied. In this study, eight fungal species were evaluated with respect to their ability to decay Parashorea smythiesii and P. tomentella wood. In addition, the effect of fungi on corroding metal screws was determined using the Kolle flask method. The evaluation showed that the fungal species Schizophyllum commune, Pycnoporus sanguineus, and Polyporus arcularius were highly capable of decaying Parashorea spp. woods. The greatest wood weight loss occurred with the heartwood of P. tomentella exposed to S. commune. Based on the classification of wood resistance against fungal attack, the two Parashorea spp. were classified as moderately resistant woods (class III). Schizophyllum commune was classified as highly capable of decaying wood that was embedded with metal screws and was highly capable of corroding metal screws placed in fungi-culture media. The greatest weight of rust powder formed because of screw corrosion was obtained from screw-embedded wood exposed to S. commune. Additionally, the most severe corrosion of metal screws that were embedded into woods was caused by the activities of P. arcularius. Moreover, the average weight loss of screw-embedded wood was greater than that of unscrewed wood.

• Journal of Microbiology and Biotechnology
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• 제10권4호
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• pp.462-469
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• 2000

Sixty-one strains representing the main genera of wood-decaying xylariaceous fungi (mainly in Daldinia, Hypoxylon, Kretzschmaria, Rosellinia, Penzigia, and Xylaria) were tested for their ability to produce ligninolytic enzymes. The phenol oxidase activity and fungal growth of the xylariaceous fungi on gallic aicid and tannic acid media showed a variation in their ability to degrade lignocellulose. A number of species showed equal 개 betterligninolytic enzyme activities than Coriolus versicolor, a known basidiomycete wood-degrader. A large variation of the enzyme activity was observed by individual strains as well as a substantial variation between the isolates of the same species. The most frequent ligninolytic enzymes were peroxidase and general oxidase. With 19% of the strains tested, peroxidase showed the strongest ligninolytic enzyme activity, while tyrosinase activity was detected only in 7% of the strains. All strains of Kretzschmaria and Rosellinia tested was positive for laccase. Xylariaceous fungi were able to degrade the macromolecule, lignin, using each specific ligninolytic enzyme in the specfic lignin degradation pathway.

• 한국산림과학회지
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• 제80권3호
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• pp.311-316
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• 1991

낙엽송 근주심재부후병균(根株心材腐朽病菌)을 이병목(罹病木)의 부후조직(腐朽組織)에서 분리(分離)하였다. 5개도(個道)의 38개임지(個林地)에서 총(總) 216본(本)의 근주심재부후목(根株心材腐朽木)으로부터 가장 높은 빈도(頻度)로 분리(分離)된 균(菌)은 Sparassis crispa(꽃송이버섯)로 조사목(調査木)의 28%를 차지하였고, Laetiporus sulphureus(덕다리버섯)가 19%, Phaeolus schweinitzii(해면버섯)가 8%순(順)으로 분리(分離)되었다. 그러나 조사목(調査木)의 45%에서는 부후균(腐朽菌)이 분리(分離)되지 않았다. 한편 근주심재부후목(根株心材腐朽木)의 수간내(樹幹內)에서 분리(分離)한 4종(種)의 담자균(擔子菌)과 3종(種)의 비담자균(非擔子菌)을 단독(單獨) 또는 상호연계처리(相互連繫處理)하여 낙엽송심재열화능력(心材劣化能力)과 상호관계(相互關係)를 조사(調査)한 결과(結果), 단독처리(單獨處理)에 의(依)한 6개월후(個月後)의 중량감소율(重量減少率)은 P. schweinitzii가 19.6%, S. crispa 10.0%, L. sulphurous 8.2%, Coriolus hirsutus 5.1% 순(順)이었고, 비담자균(非擔子菌)은 4.4%이하(以下)였다. 또한 상호결합처리(相互結合處理)에서 비담자균(非擔子菌)인 Geotrichum candidium, G. sp. 및 Verticillium sp.는 S. crispa, L. sulphurous 및 C. hirsutus의 부후활동(腐朽活動)을 다소(多少) 촉진(促進)시켰으나, P. schweinitziii에는 영향(影響)하지 않았다.

• 한국균학회지
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• 제3권2호
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• pp.25-29
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• 1975

우리나라 담자균류 12균주 중 톱밥의 lignin을 잘 분해하는 균주 Pleurotus ostreatus 1주를 선발할 수 있었다. 이 균주는 톱밥에 20%의 미강을 첨가하고 보통배지에 첨가되는 무기염을 첨가하면 $30^{\circ}C$에서 30일이면 lignin의 49%를 분해할 수 있었고 다시 무기 N을 단백질로 전환시킬 수도 있으며 여기서 단백질 증가율은 26%였다.