• Journal of Microbiology and Biotechnology
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• 제8권6호
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• pp.575-580
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• 1998

Cellulase production by batch culture using the Trichoderma reesei Rut C30 strain with various concentrations of Solka Floc with 1 % wheat bran was studied in a 2.5 I fermenter. The cellulase activity increased with Solka Floc concentration up to 5%. When 5% Solka Floc and 1% wheat bran were contained in the medium, carboxymethyl cellulose (CMC) and filter paper (FP) activities were 232.4 U/$m\ell$ and 21.25 U/$m\ell$, respectively. The productivity was 143.6 FPU $1^{-l}h^{-1}$ and the yield was 425 FPU/g. The colonial morphology of T. reesei Rut C30 grown on Avicel agar plates and the changes in mycelial morphology of T. reesei Rut C30 with culture time are also presented.

• 농업과학연구
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• 제17권2호
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• pp.77-81
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• 1990

Chitin 합성 저해제인 buprofezin이 P. ostreatus 및 P. sajor-caju 균사의 생장과 원형질체 나출 및 재생에 미치는 영향을 조사한 바를 요약하면 buprofezin은 P. ostreatus 및 P. sajor-caju.의 균사생장을 심히 저해하였고 buprofezin의 첨가농도가 높을수록 균사생장 억제가 심하였다. Buprofezin 처리에 의하여 기균사가 증가하였으나 균사의 형태에는 변화가 없었다. 원형질체의 나출량은 buprofezin 200-500 ppm 첨가구의 균사에서 무처리보다 현저히 높은 결과를 보였고, 원형질체의 재생율은 buprofezin의 처리에 의하여 증가하였다.

• Journal of Microbiology and Biotechnology
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• 제29권5호
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• pp.809-812
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• 2019

Bacterial strains that improve mycelial morphology and growth of white-rot fungi in liquid medium could enhance the impact of white-rot fungi towards lesser recovery of neonicotinoids when cocultured. This was demonstrated by the recovery of clothianidin and acetamiprid from cocultures of the white-rot fungus Phlebia brevispora strains with two mycelial-growth-promoting bacteria, Enterobacter sp. TN3W-14 and Pseudomonas sp. TN3W-8. Clothianidin recovery from cocultures of white-rot fungi and bacteria was over 40% lower than that from axenic microbial cultures and mixed-bacterial cultures. About 20% less acetamiprid was equally recovered from both TMIC33929+TN3W-14 cocultures and mixed-bacterial cultures than from axenic fungal and bacterial cultures.

• 한국미생물·생명공학회지
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• 제21권6호
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• pp.520-526
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• 1993

A morphologically different form of Ganoderma lucidum was isolated from a cultivator's farm, and its optimum growth conditions were determined. A major difference in their morphology was color of fruit bodies. Fruit bodies of the mutant were white wherase those of normal Ganoderma lucidum were red. Spores of the mutant were global and mycelia were thin. Mycelial growth of this white mutant was favorable on potato sucrose agar medium, and optimum pH of the medium was 5.5.

• 한국미생물·생명공학회지
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• 제21권6호
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• pp.594-599
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• 1993

In the course of screening for microbial metabolites employing human cancer cell line, we identified a mycelial extract of Streptomyces sp. 1365, which are effective on growth inhibition and morphological change of MCF-7, human breasr cancer cell line. By repeased column chromatography and recrystallization process, yellow needle crystals were obtained as an active compound and identified as resistomycin by spectral analysis.

• Mycobiology
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• 제46권4호
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• pp.396-406
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• 2018

A newly isolated white rot fungal strain KU-RNW027 was identified as Trametes polyzona, based on an analysis of its morphological characteristics and phylogenetic data. Aeration and fungal morphology were important factors which drove strain KU-RNW027 to secrete two different ligninolytic enzymes as manganese peroxidase (MnP) and laccase. Highest activities of MnP and laccase were obtained in a continuous shaking culture at 8 and 47 times higher, respectively, than under static conditions. Strain KU-RNW027 existed as pellets and free form mycelial clumps in submerged cultivation with the pellet form producing more enzymes. Fungal biomass increased with increasing amounts of pellet inoculum while pellet diameter decreased. Strain KU-RNW027 formed terminal chlamydospore-like structures in cultures inoculated with 0.05 g/L as optimal pellet inoculum which resulted in highest enzyme production. Enzyme production efficiency of T. polyzona KU-RNW027 depended on fungal pellet morphology as size, porosity, and formation of chlamydospore-like structures.

• 한국균학회지
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• 제16권1호
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• pp.16-20
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• 1988

영지(靈芝)의 항암물질개량(抗癌物質改良)과 신품종(新品種)의 육성(育成)을 위(爲)한 (육종역법)育種方法으로 제시된 원형질체융합(原形質體融合)의 기초자료를 얻고자 영양요구성균주(營養要求性菌株)의 선발(選拔), 종간원형질체융합(種間原形質體融合)과 융합균주(融合菌株)의 선발(選拔)을 실험(實驗)하였다. 1. 돌연변이(突然變異) 대상체(對相體)로는 균사체(菌絲體), mutagen으로는 자외선(紫外線)을 사용하였는데 영양요구성균주(營養要求性菌株)의 유기율(誘起率)은5.78%이었다. 2. 영지(靈芝)와 잔나비걸상버섯간(間) 원형질체융합률(原形質體融合率)은 2.03%이었다. 3. 융합균주(融合菌株)는 환원균총(還元菌叢)의 생장속도(生長速度)와 형태(形態)를 비교(比較)하여 선발(選拔)하였고, 계대배양후(繼代培養後)의 형태(形態)와 esterase isozyme pattern의 분석(分析)에 의해서 확인(確認)하였으며, 참나무톱밥배지(培地)에서 재배(栽培)하여 자실체(子實體)를 관제(觀祭)하였다.

• 한국버섯학회지
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• 제2권2호
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• pp.49-59
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• 2004

영지속 (Ganoderma) 수집 균주의 유연관계를 밝히고자 균사체 생장, 후막포자 형성여부, 온도별 균사 생장, 자실체의 형태를 조사하였다. 영지의 균사생장은 115개 균주 중 68개 균주가 GCM에서 가장 양호하였으며, 균사생장은 균주간에 많은 변이가 있었다. 수집균주는 균총의 형태에 따라 28개 group으로 구분되었는데 대부분 CM3와 CM8 group에 속하였다. 이들 균사체를 현미경으로 관찰한 결과 후막포자를 형성한 균주는 G. lucidum ASI 7022 등 16균주였으며, 국내에서 수집된 대부분의 G. lucidum 균주들은 후막포자를 형성하지 않았다. 한편 이들은 온도별 균사생장 시험에서도 $35^{\circ}C$ 고온에서 상대적으로 균사생장이 저조하였는데 미국에서 도입된 G. lucidum과 다른 특성을 보이고 G. tsugae와 유사한 특성이었다. 영지 115개 균주 중 톱밥배지에서 자실체가 발생한 균주는 97개 균주였고 형태는 편각형이 89.7%, 녹각형이 10.3% 였으며, 이러한 형태는 $CO_2$의 농도에 따라 변이가 있었다. 본 실험 결과 국내에서 수집된 G. lucidum 균주는 분류를 재검토하여야 할 것으로 사료되었다.

• 한국균학회지
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• 제51권4호
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• pp.277-286
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• 2023

Tan spot, caused by Pyrenophora tritici-repentis, is a major foliar disease in wheat worldwide. In April 2021, tan spot symptoms were observed in a commercial wheat field in Suncheon, Jeonnam Province, Korea, with over 5% of the wheat leaves exhibiting symptoms. These symptoms included oval-shaped tan necrosis surrounded by a bright halo. The three representative isolates exhibited irregular mycelial growth on V8-potato dextrose agar and produced pseudothecia. Based on the concatenated sequence datasets of four multi-genes, including the internal transcribed spacer, large subunit ribosomal RNA, glyceraldehyde-3-phosphate dehydrogenase, and RNA polymerase II second-largest subunit genes, phylogenetic analysis revealed that these three isolates clustered in the same clade as P. tritici-repentis. Results of pathogenicity test indicated that the initial symptoms appeared 5 days post-inoculation (dpi), with typical tan spot symptoms developing at 7 dpi. The pathogen was successfully re-isolated from the symptomatic tissues, thus fulfilling Koch's postulates. Furthermore, we selected three fungicides that effectively inhibited the mycelial growth of P. tritici-repentis by more than 90% in vitro. To the best of our knowledge, this is the first report of tan spot disease in wheat in Korea.

• 한국균학회지
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• 제41권4호
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• pp.225-230
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• 2013

한국 및 일본산 잣버섯 수집균주(21균주)를 소나무 톱밥배지에서 배양하여 그 재배 특성 (균사체 배양기간, 자실체 발생기간, 버섯의 생산량, 자실체의 색상과 형태)을 조사하였다. 잣버섯의 균사체 배양기간은 40~65일, 자실체 발생기간은 6~22일로 나타났다. 자실체 생산성을 조사한 결과, 톱밥배지 600 g당 생중량과 자실체 발생 수는 각각 약 48.3 g과 8.7개였으며, 자실체의 색과 형태는 균주별로 다양하게 관찰되었다. 균긁기 처리군은 미처리군(대조군)에 비해 자실체 발생기간이 길었으며, 생중량과 갓 직경은 감소하였다. 잣버섯의 재배 특성을 비교한 결과, 소나무 톱밥 재배용으로 3균주(KFRI 1199, 1302, 1331)가 가장 적합한 것으로 평가되었다.