• 한국임상수의학회지
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• 제11권2호
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• pp.525-527
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• 1994

데마슘과 오수생물인 Exserohilum rostratum 진균이 피부염에 걸린 2세의 암말 피부 병변으로부터 분리되었다 이 암말은 다수의 작고, 인설로 덮힌 불규칙한 모양의 백회색 탈모 병변을 목과 등에 나타내었다. 감염경로는 확인되지 않았으나 Exserohilum rostratum은 자연 상태에서 오수생물로써 증식한다. 저자들의 지식으로써는 피부병에 걸린 어린 말에서 Exserohilum rostratum의 분리는 새로운 숙주를 기록하는 것이다. 다양한 동물의 질병에서 Exserohilum rostratum의 역할을 조사해야 될 것을 제시하였다.

• 한국균학회지
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• 제29권2호
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• pp.110-115
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• 2001

1998년 화본과 작물, 목초, 잔디 및 야생잡초의 잎점무늬와 잎마름 증상으로부터 분리한 66균주에서 Bipolaris 9종, Drechslera 2종 및 Exserohilum 2종을 동정하였다. 동정결과 Bipolaris bicolor, B. coicis, B. cynodontis, B. maydis, B. oryzae, B. panici-miliacei, B. setarial, B. sorghicola, B. sorokiniana, Drechslera dictyoides, D. graminea, Exserohilum oryzicola 및 F. turicum이 분리되었다. 분생포자와 분생자경의 균학적 특징은 자연적 기질과 물한천배지에서 관찰하였다. 그 중에서 B. bicolor, B. sorghicola, D. dictyoides 및 E. oryzicola 4종과 기주식물 12종을 국내에서 처음 보고한다.

• Journal of Applied Biological Chemistry
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• 제42권1호
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• pp.45-47
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• 1999

Two phytotoxic compounds were isolated from a culture of Exserohilum monoceras Inu-1, a fungal pathogen of Barnyard grass. The structure was determined by spectroscopic analyses including 2D NMR experiments. During the isolation procedure, the toxic components were monitored by the assay using Italian ryegrass (Lolium multiflorum Lam.), a host plant of the pathogen. The compounds inhibited the root growth of the host plant seedlings at a level of 100 ppm. While no substantial inhibition was observed even at 300 ppm in non-host plant seedlings such as lettuce and tomato.

• 한국식물병리학회지
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• 제13권2호
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• pp.132-137
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• 1997

Phytotoxicity of the culture filtrate and culture conditions for the production of the phytotoxin by Exserohilum monoceras 92-044 were examined. The necrotic lesions were developed on the leaves of Echinochloa crus-galli within 48 hrs after inoculation of the culture filtrate, and the leaves were completely blighted within 5∼7 days. Maximum toxicity was found in the culture broth containing 20% V-8 juice. Phytotoxin accumulation and fungal growth reached their highest peak at around 11 days. Typical symptom appeared on the leaf of E. crus-galli within 48 hrs. Only a weak chlorosis appeared on rice, Arundinella hirta (THUNB) and henry crabgrass (Digitaria sanguinalis SCOP.), but no further symptom developed.

• 한국균학회지
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• 제14권2호
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• pp.179-183
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• 1986

1985년(年)에 수입(輸入)한 종자(種子)에서 검출(檢出)된 진균(眞菌) 24종(種) 중(中) 일본산(日本産) 시금치에서 Verticillium dahliae 잔디에서 Exserohilum halodes 중공산(中共産) 수수에서 Chaetomium globosum과 Chaetomium elatum, Curvularia intermedia, 대만산(臺灣産) 야자에서 Graphium putredinis, Phaeoisaria clematides, 그리고 대만산(臺灣産)과 태국산(産) 야자와 관음죽에서 Macrophomina sp. 등(等)이 조사(調査)되어 그 결과(結果)를 보고(報告)하는 바이다.

• 한국식물병리학회:학술대회논문집
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• 한국식물병리학회 1999년도 정기총회 및 춘계 학술발표회
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• pp.15.1-15
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• 1999

• 한국작물학회지
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• 제58권2호
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• pp.91-106
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• 2013

Exserohilum turcicum is considered serious destructive disease of maize (Zea mays L.) in North Korea. This study aimed to understand genetic inheritance and combining ability of newly bred lines of maize tolerant to E. turcicum by diallel crosses. Three diallel sets for two different ecological regions and one agronomic trait; eastern (E), northern (N) and stay green (SG) involving 29 inbred lines were tested in eight locations of 2000 and 2001. E. turcicum infections were under natural conditions, respectively. Lines used were selected for high yield potential in test crosses with good agronomic traits and tolerance to biotic and abiotic stresses. Selection for race specific high resistance to biotic stresses was avoided to select quantitatively inherited genes. Host plant responses to E. turcicum were rated on a scale of 1 (highly tolerant) to 9 (highly susceptible). Highly significant variations were recorded in all trials. General combining ability (GCA) mean square was roughly twice that of specific combining ability (SCA). The genotype (G) by environment (E) interaction was highly significant. The overall results of genetic studies in three diallel sets show that genetic control for inbred tolerance to E. turcicum is polygenic and quantitatively inherited. New inbreds; E-3, N-1 and SG-4 confer better tolerance to E. turcicum than the widely used inbreds; Mo17, and B73. Proper use of genetic information from this study shall increase of corn production under high E. turcicum infection in the Far Eastern Regions of Korea and China.

• 한국작물학회지
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• 제57권2호
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• pp.113-126
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• 2012

Northern corn leaf blight caused by Exserohilum turcicum Pass is considered the most important disease infecting corn (Zea mays L.) in the Peoples' Republic of Korea (North Korea). It contributes to the food shortage in North Korea. The objectives of the current research were to study resistance expression and responses of corn crosses made between ten hybrids from North Korea and inbreeding lines ($S_{3-4}$ stage) from the Republic of Korea (South Korea). The experiments were conducted in six trials with a total of 184 crosses including two commercial hybrids in each trial. The trials were conducted at two locations in North Korea (Mirim and Eunsan) and one location in South Korea (Gunwi) under natural infestation of E. turcicum. Host plant responses were rated on a scale of 1 (highly tolerant) to 9 (highly susceptible). A total of 111 crosses (62.4%) showed significant tolerant or susceptible response variations among three locations; 42 crosses (22.8%) at two locations and 69 crosses (39.0%) at one location, respectively. At least 8 crosses of high level of tolerance and 12 crosses of high level of susceptibility showed significantly different biotic responses (P = 0.05). The results of the current study and historical reviews of E. turcicum epidemics in both North and South Korea suggest that breeding of tolerance with quantitatively inherited genes should be carried out for a sustainable corn production in North Korea.

• 식물병연구
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• 제29권2호
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• pp.137-144
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• 2023

Exserohilum turcicum is a fungus that causes northern corn leaf blight (NCLB) and has deleterious effects on maize production globally. Therefore, it is prudent to mitigate the effects of NCLB using genetic diversity. The objective of this research was to assess the severity of NCLB disease on the growth and yield of various maize genotypes. A randomized complete block design field experiment, replicated three times, was conducted to evaluate the effect of E. turcicum on 10 maize hybrids. Percent disease index, plant height, and leaf area were recorded at the silk stage. Cob weight, grain fresh weight, and grain yields were determined at harvest maturity. All measured parameters were significantly different (P<0.05) between the maize hybrids. Of the 10 genotypes, four (PAN 4R-528R, PAN 4R-728BR, PAN 3R-724BR, and P1788BR) were susceptible, five (DKC74-74BR, PAN 5R-582R, PAN 5R-890R, PAN 5R-854R, and PAN 5R-590R) were moderately susceptible, and one (DKC80-40BR) was moderately resistant. DKC80-40BR exhibited greater cob weight, while DKC74-74BR was superior in all other plant growth and yield components. Interestingly, although not significant (P>0.05) and high, maize growth and yield parameters had negative correlations with disease incidence, except for grain fresh weight. Therefore, DKC80-40BR may be selected for cultivation in areas prone to NCLB to reduce maize susceptibility to the disease, while DKC74-74BR may improve crop performance. These hybrids could be considered as potential sources of resistance or tolerance to NCLB for further validation by plant breeders.

• 생명과학회지
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• 제22권10호
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• pp.1384-1391
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• 2012

본 연구에 사용된 해안식물은 울릉도의 해안지역으로부터 채집하였다. 그리고 식물은 큰비쑥, 해국, 갯질경이, 땅채송화, 갯강아지풀 등 5종류의 식물이 채집되었다. 울릉도에서 채집된 해안식물의 뿌리로부터 36주의 내생진균이 분리되었다. 모든 내생진균류는 ITS영역에 의해 분석 및 동정되었다. 그리고 계통분석 결과, 분리된 내생진균류는 모두 자낭균문에 속하고 4종류의 목(Capnodiales, Eurotiales, Hypocreales and Pleosporales)으로 분류되었으며, 이 중 Eurotiales 목이 가장 분포 비율이 높은 것으로 확인되었다. 그리고 내생진균류를 속으로 분류하였을 때, 9종류의 속(Alternaria, Aspergillus, Cladosporium, Exserohilum, Fusarium, Neosartorya, Penicillium, Phoma and Pyrenochaeta)으로 분류되었으며, Penicillium 속과 Aspergillus 속이 가장 우점종으로 확인되었다. 그리고 Shannon's diversity index (H')는 0.684에서 1.609의 분포로 나타났으며, 땅채송화에서 분리된 내생진균류의 다양성이 다른 식물에 비하여 높은 것으로 확인되었다.