• 한국미생물·생명공학회지
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• 제31권3호
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• pp.301-306
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• 2003

Twenty-one different fungi were tested for their ability to decolorize a wide range of structurally different dyes. Twenty fungal strains were isolated from fruiting bodies which were collected at the Kwangneung National Arboretum, Korea. One fungal strain were isolated from a rotting wood at Soongsil University, Korea. Nine kinds of dyes were used: three anthraquinone dyes and six azo dyes. The five fungal strains, Laetiporus sulphureus, Polyporus arcularius. Auricularia polytricha, Stereum ostrea, and Bjerkandera sp. UK-l showed decolorization ability. Except Auricularia polytricha, the four fungal strains were wood rotting fungi, and belonged to Aphyllophorales. Bjerkandera sp. UK-I, which was a white rot fungus, could decolorize all kinds of dyes tested in this study, indicating this fungus is one of candidates for applying in biological methods of dye waste treatment.

• Journal of the Korean Wood Science and Technology
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• 제47권2호
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• pp.210-220
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• 2019

This work aimed to evaluate the influence of culture conditions on laccase production in the co-culture of wood-rotting fungus with Trichoderma sp. The effects of infection extent, infection time, and culture filtrate of Trichoderma sp. on the laccase production by wood-rotting fungus in co-culture were examined. T. rubrum LKY-7 and T. longibrachiatum were selected as fungi which are effective in co-culture for laccase production. A significant increase in laccase activity was observed when T. rubrum LKY-7 was co-cultured with T. longibrachiatum in glucose-peptone liquid medium, yielding an increase of more than 5 times in laccase activity, as compared with control. Laccase production by T. rubrum LKY-7 during co-culturing was significantly influenced by the infection extent and the infection time of T. longibrachiatum. Maximal laccase activity was obtained when T. rubrum LKY-7 culture was infected by T. longibrachiatum after 3 days of cultivation at an inoculum size ratio of 0.5 to 1. The addition of culture filtrate or autoclaved mycelium of T. longibrachiatum to T. rubrum LKY-7 culture did not significantly enhance laccase production by T. rubrum LKY-7 as compared with control (mono cultures of T. rubrum LKY-7).

• Journal of the Korean Wood Science and Technology
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• 제46권6호
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• pp.670-680
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• 2018

Acanthophysium sp. KMF001, a wood rotting fungus, produces a strong crude enzyme complex that efficiently produces simple sugars from wood. The transcriptomic analysis of Acanthophysium sp. KMF001 identified 14 genes for putative glycoside hydrolases. Among them, isotig01043 was expressed heterogeneously in Escherichia coli BL21(DE3), and the expressed protein exhibited an endo-${\beta}$-1,4-xylanase activity which showed the optimum reaction at pH 5.0 and $30^{\circ}C$. The enzyme kinetic values of $K_m$ and $V_{max}$ were 25.92 mg/ml and $0.628{\mu}mole/mg/ml$, respectively. The enzymatic characteristics of the expressed xylanase showed a typical fungal xylanase. However, the bioinformatics analysis suggested that the protein encoded by isotig01043 was a novel xylanase based on a low identity when it was compared with the closest protein in the NCBI database and a similar protein domain with GH16_fungal_Lam16A_glucanase, which had not been earlier suggested as a xylanase.

• Journal of the Korean Wood Science and Technology
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• 제44권2호
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• pp.253-263
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• 2016

Fungi, such as the wood-rotting Polyporus brumalis, are excellent sources of pharmaceutically interesting natural products such as sesquiterpenoids. In this study, we investigated the biosynthesis of P. brumalis sesquiterpenoids on modified medium. Ten additional species of white rot fungi were inoculated in medium containing nutrients such as $C_6H_{12}O_6$, $C_4H_{12}N_2O_6$, $KH_2PO_4$, $MgSO_4$, and $CaCl_2$ at $28^{\circ}C$ for 25 days. After 10 days of incubation, eudesmane-type sesquiterpenes, ${\beta}$-eudesmane and ${\beta}$-eudesmol, were only synthesized during the growth phase of P. brumalis. Experiments excluding one nutrient at a time were conducted to determine the effects of inorganic nutrients on sesquiterpene biosynthesis. In conclusion, GC-MS analysis showed that biosynthesis of sesquiterpenes was differentially regulated by inorganic nutrients such as $MgSO_4$, $C_4H_{12}N_2O_6$, and $KH_2PO_4$. We found $MgSO_4$ supplementation to be vital for eudesmane-type sesquiterpene biosynthesis in P. brumalis; nitrogen ($C_4H_{12}N_2O_6$) and phosphate ($KH_2PO_4$) inhibited the synthesis of P. brumalis metabolites. Magnesium is a known cofactor of sesquiterpene synthase, which promotes ${\beta}$-eudesmol synthesis. To mechanistically understand eudesmane-type sesquiterpene biosynthesis in P. brumalis, further research into the genes regulating the dynamics of such biosynthesis is warranted.

• Journal of Microbiology and Biotechnology
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• 제10권6호
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• pp.737-752
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• 2000

Wood-rotting basidiomycetous fungi are the most efficient degraders of lignin on earth. The white-rot fungus Phanerochaete chrysosporium has been used as a model microorganism in the study of enzymology and its application. Because of the ability of the white-rot fungus to degrade lignin, which has an irregular structure and large molecular mass, this fungus has also been studied in relation to degrading and mineralizing many environmental pollutants. The fungus includes an array of enzymes, such as lignin peroxidase (LiP), manganese-dependent peroxidase (MnP), cellobiose:quinone oxidoreductase, and $H_2O_2$-producing enzymes and also produces many other components of the ligninolytic system, such as veratryl alcohol (VA) and oxalate. In addition, the fungus has mechanisms for the reduction of degradation intermediates. The ligninolytic systems have been proved to provide reductive reactions as well as oxidative reactions, both of which are essential for the degradation of lignin and organopollutants. Further study on the white-rot fungus may provide many tools to both utilize lignin, the most abundant aromatic polymer, and bioremediate many recalcitrant organopollutants.

• 한국균학회지
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• 제10권4호
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• pp.203-206
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• 1982

1981년(年) 9월(月)부터 1982년(年) 10월(月)까지 서울대학교(大學校) 수원(水原)캠퍼스내(內)에서 목재부후균(木材腐朽菌)을 채집(採集)하였다. 이들은 2목(目), 8과(科), 22속(屬), 34종(種)으로 분류(分類)되였으며, 그 중(中) 한국산(韓國産) 미기록속(未記錄屬) Gloeoporus와 미기록종(未記錄種) G. adustus(Willd. ex Fr.) $Pil\acute{a}t$ 및 G. dichrous(Fr.) Bres.가 발견(發見)되었다. 이들 신종(新種)에 대해 우리말 버섯이름이 주어졌으며, 자실체(子實體)에 대한 기술(記述)을 덧붙였다. 채집(採集)된 34종(種)에 대해 각각(各各) 서식(棲息)하는 나무의 속명(屬名)을 기재(記載)하였다. 각(各) 표본(標本)은 서울대학교(大學校) 농과대학(農科大學) 농생물학과(農生物學科)에 보존(保存)되어 있다. 한국산(韓國産) 미기록종(未記錄種)의 동정(同定)에 협조(協助)하여 주신 미국(美國) Virginia주립대학교(州立大學校) Orson K. Miller, Jr. 교수(敎授)에게 감사(感謝)를 드린다.

• 펄프종이기술
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• 제31권2호
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• pp.8-14
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• 1999

A screening has been performed to find hyper-ligninolytic fungi, which degtrade beech and pine lignin extensively in order to broaden the understanding of the ligninolytic enzymes elaborated by various white-rot fungi. One hundred and twenty two ligninolytic strains were selected from decayed woods with a selective medium for screening ligninolytic wood-rotting fungi. Two of them, Phanerochaete sordida YK-624 and YK-472, showed much higher ligninolytic activity and selectivity in beech-wood degradation than typical lignin-degrading fungi, phanerochaete chrysosporium and Coriolus versicolor. They also degraded birch dioxane lignin and residual lignin in unbleached kraft pulp(UKP) much more extensively than P. chrysosporium and C. versicolor. During fungal treatment of beech wood-powder, the fungus strain P. sordida YK-624 showed higher activity of extracellular manganese peroxidase (MnP) in the medium than P. chrysosporium. It also showed MnP activity, which would not be lignin peroxidast during treatment of oxygen-bleached kraft pulp(OKP) and under enzyme-inducing conditin.

• Journal of Forest and Environmental Science
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• 제33권4호
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• pp.322-329
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• 2017

As a result of contemporary environmental concerns, a number of studies from plants' tissues as one of the alternatives to conventional chemicals are increasingly investigated. In tandem with these trends, Lagenaria breviflora (LB) fruit, reputed as antiviral and depilatory agents in the Yoruba folkloric medicine was examined on Vitex doniana wood to ascertain its antifungal activity. Fungicides of 25%, 50%, 75%, and 100% LB fruits formulations (concentrations) were developed through simple one-step mechanical-forming process, including control. In this study, the yield, the chemical compositions, the absorption capacity of the fungicides and wood weight losses (WWL) analysis were evaluated to investigate the antifungal activity of LB fruit on wood. The fruit extract yielded 35.4% of fresh juice weight. LB fruits contained total: alkaloids ($8.78{\pm}0.21mg/mL$), flavonoids ($2.01{\pm}0.02mg/mL$), phenol ($7.42{\pm}0.09mg/mL$), saponins ($11.00{\pm}0.10mg/mL$) and tannins ($5.47{\pm}0.05mg/mL$) contents. All the formulations provided effective protection against the tested wood fungi compared to control. Interestingly, the antifungal activity of 50% and 25% formulations of 6.8% WWL and 9.9% WWL satisfied the excellent fungal resistance class description against white rot fungus (Ganoderma lucidum) and brown rot fungus (Fibroporia vaillantii), respectively according to ASTM D 2017. These results thus, support LB fruit as a strong potential source of natural antifungals for industrial wood production.

• Archives of Pharmacal Research
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• 제1권1호
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• pp.33-40
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• 1978

From the carpophores of Coriolus sanguineus Fr., a bright-red wood-rotting fungus, which were collected at Suwon, an antibiotic component was isolated as red crystal and identified as cinnabarin by UV and IR spectra. The antibiotic activities against five bacteria and three fungi were determined. It showed considerably high activity against Bacillus subtilis ATCC 6633 and Bacillus maceraus and also against all the three fungi tested. And from this fungus a sterol was isolated and identified as erogosterol by cochromatographing with four authentic sterols.

• 한국균학회지
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• 제39권1호
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• pp.44-47
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• 2011

전라남도 장흥군 일대에서 재배 중인 표고골목에 대량으로 발생한 해균을 육안과 현미경관찰 및 ITS (Internal Transcribed Spacers) 분석한 결과, 줄버섯(Bjerkandera adusta)인 것으로 확인되었다. 줄버섯이 표고골목에 대량 발생한 예는 아직까지 없기 때문에 이 해균에 대한 특성 또한 보고된 바가 없다. 따라서 본 연구에서는 줄버섯에 의해 피해를 입은 골목 내부의 상태와 일부 생리적인 특성 및 표고균에 대한 길항력에 대해 시험을 진행했다. 먼저, 줄버섯은 표고와 같은 백색부후균이기 때문에 골목 내부의 상태가 표고에 의해 부후된 것과 비슷했다. 하지만 표고균에 의해 부후된 골목과 달리 수피 아래 목질 조직에 깨알 같은 점들이 많이 있는 특징을 보였다. 그리고 표고균의 최적균사생장 온도가 $25^{\circ}C$ 내외인 반면에 줄버섯균주는 $30^{\circ}C$에서 최적의 생장을 보였다. $15^{\circ}C$, $20^{\circ}C$, $25^{\circ}C$, $30^{\circ}C$에서 표고균주와의 대치배양 결과, 모든 온도조건에서 표고균주보다 균사생장이 빨라 표고균사를 덮었다. 이런 시험결과는 표고골목이 고온에 노출될 경우, 줄버섯의 대량 번식 위험이 높을 뿐만 아니라 일단 줄버섯에 오염되면 표고균이 입을 피해가 큼을 의미한다. 따라서 줄버섯에 의한 피해를 예방하기 위해서는 골목 내부에서 표고균이 빠르게 만연될 수 있도록 배양하면서 여름에는 골목이 고온에 노출되지 않게 관리해야할 것으로 판단된다.