• 한국식물병리학회:학술대회논문집
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• 한국식물병리학회 2003년도 정기총회 및 추계학술발표회
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• pp.134.1-134
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• 2003

Aecial host ranges of four Gymnosporangium species causing cedar-apple rust diseases, G. asiaticum, G. cornutum, 5. japonicum and G. yamadae, were investigated through artificial inoculation. Thirteen species of nine genera among Rosaceous plants, which have been reported as social hosts in Korea, were inoculated with fresh teliospores spores in early days of May of 2000 and of 2001, respectively. In the results, we re-confirmed that there was highly specific relationship between the rust species and aecial hosts and report new aecial hosts of four Gymnosporangium species. Teliospores of G. cornutum collected from Juniperus rigida successively produced spermogonia and aecia only on Sorbus alntifolia, the first report on host alteration of G. cornutum in Korea. Positive responses by teliospores of G. japonicum from J. chinenis of Suwon and from J. chinenis var. horizontalis of Jeju island were obtained only on P. villosa. Crataegus pinnatifida was confirmed as a new aecial host of G. viatium. Until this time, G. ymadae was believed to have Malus as the aecial host. However, teliospores of G. yamadae collected from J. chinensis var. kaizuka successively formed spermogonia and aecia on the leaves of Chaenomeles lagenaria, C. sinensis, Pyrus pyrtifolia var, culta, P. ussuriensis, Malus pumila and M. sileboldii. The date for maturation of spermogonia and aecia, and symptom development varied according to the rust fungi and aecial host plants, respectively.

• The Plant Pathology Journal
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• 제24권1호
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• pp.84-86
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• 2008

Field surveys and specimen collections of the rust fungal pathogen Gymnosporangium were carried out for 15 years from 1985 through 1999 in various locations of Korea. Macroscopic and microscopic examinations of morphological characteristics of aecia from the collected specimens revealed that Gymnosporangium globosum is the causal agent of American hawthorn rust disease on Crataegus pinnatifida and C. pinnatifida varmajor. The host plants are new for this rust fungus. G. globosum was found only in Gyeonggi and Chungbuk provinces, indicating that its distribution in Korea is limited. This is a first full description on morphological characters of aecia of G. globosum in Korea.

• 한국산림과학회지
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• 제50권1호
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• pp.72-73
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• 1980

The spermagonial state of Cronartium ribicola J. C. Fisher appeared on the discolored bark of Korean pine (Pinus koraiensis Sieb. & Zucc.) from late August through middle of October in Korea. A large number of ellipsoid or ovoid spermatia were contained in the spermagonial exudates that appeared on the bark of infected trees. In the spring (April-May) following the appearance of spermagonia, aecia broke through that part of the bark which had been occupied by spermagonia the year before.

• Mycobiology
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• 제43권3호
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• pp.351-353
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• 2015

Farfugium japonicum is used in traditional medicine and as an edible herb in China and Korea. In July 2013, leaf spots were observed in F. japonicum seedlings at Ulleung Island, Gyeongsangbuk Province, Korea. Early symptoms on the leaf adaxial surface included roughly circular yellow spots that later developed brown, necrotic centers. The aecia were hypophyllous, cupulate, yellowish, $180{\sim}430{\mu}m$ in diameter, clustered, and erumpent with a peridium with a recurved margin. The aeciospores were globoid, $14{\sim}17{\times}13{\sim}16{\mu}m$, light yellow or colorless, and densely verrucose. The 28S rDNA sequence of the isolate was identical to each other and shared 99% identity with Puccinia caricis. This is the first report of rust caused by P. caricis in F. japonicum in Korea or elsewhere in the world.

• 식물병연구
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• 제21권3호
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• pp.250-252
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• 2015

The tejocote (Crataegus spp.) is a tree considered to be native to Mexico. The aim of this study was to identify the causal agent of tejocote rust in the State of Puebla. Tejocote fruits were sampled in 2012 and 2013. The fungus was studied morphologically using light and scanning electron microscopy and molecularly using phylogenetic analysis of 18S and 28S rDNA genes. The fungus was identified as Gymnosporangium clavipes on tejocote fruits. To our knowledge, this is the first confirmed report of Gymnosporangium clavipes Cooke & Peck affecting Crataegus mexicana var. Chapeado and C. gracilior in Puebla Mexico.

• The Plant Pathology Journal
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• 제21권4호
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• pp.310-316
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• 2005

The objectives of this study were to identify the aecial host ranges of four Korean Gymnosporangium species, G. asiaticum, G. cornutum, Gjaponicum and Gyamadae, and to verify the morphological characteristics of telia as diagnostic keys to the species. Thirteen Korean Rosaceous woody species were artificially inoculated with teliospores obtained from Juniperus species. There was high specificity between telial and aecial hosts and the fungal species, providing the first experimental proof on host alternation of these rust fungi in Korea. Telia on the witches' broom and on the small galls were identified as new telial characteristics in G asiaticum and in G. yamadae, respectively. Aecial hosts of G. asiaticum and G. yamadae showed varying responses in their susceptibility and in the days required for formation and duration of spermogonia and aecia after inoculation. Four telial host species in Juniperus were confirmed for the first time in Korea, which include J. chinensis var. kaizuka, J. chinensis var. horizontalis and J. chinensis var. globosa for G. asiaticum; and J. chinensis var. kaizuka for G. yamadae.

• 식물병연구
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• 제26권3호
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• pp.179-182
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• 2020

2018년 7월 전라남도 강진군의 가로수 전체 이팝나무에 심각한 녹병증상이 발견되어 잎을 채집하였다. 채집한 이팝나무 잎 앞면에서 황색 및 갈색의 병반과 잎 뒷면에서 황색의 녹포자기가 관찰되었고, 현미경아래에서 41.2 ㎛ 크기의 구형 녹포자와 28.84 ㎛ 크기의 구형 하포자가 확인되었다. 이팝나무 녹병균의 부분 small subunit rRNA, internal transcribed spacer (ITS) 1, 5.8S rRNA, ITS2, 부분 large subunit rRNA 염기서열을 이용하여 계통학적 유연관계를 분석한 결과, 대나무 녹병균으로 보고 되어져 있는 Puccinia kusanoi와 가까운 근연관계를 가지고 있었다. 또한 2019년 5월 무위사로 이팝나무 주변에 식재된 대나무에서도 녹병 병징이 관찰되었고, 잎 뒷면에서 동포자퇴와 동포자를 확인하였으며, 대나무에서 채집한 동포자의 염기서열 분석 결과, 이팝나무 녹병균과 100% 일치하였다. 본 논문은 대나무 녹병균으로 알려진 P. kusanoi와 근연관계가 가까운 새로운 종 Puccinia sp. JCK-KCFR1 strain (MT729824)가 국내에서 이팝나무와 대나무를 기주교대하며 녹병을 발생시키는 것을 처음으로 보고한다.

• 식물병연구
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• 제14권3호
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• pp.214-218
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• 2008

국립산림과학원에서 표본실에 보관되어 있는 잣나무 잎녹병 건조표본에 대하여 광학현미경과 주사형 전자현미경으로 녹병정자기와 녹포자기의 형태 및 크기, 호막세포의 모양, 크기 및 표면구조, 녹포자의 모양, 크기 및 표면구조(돌기의 형태, 크기, 수/$100\;{\mu}m^2$)등 녹포자세대의 분류형질에 대한 형태학적 특징을 조사하고 기존 연구결과와 비교한 결과, 9개의 건조표본이 국내 미기록 녹병균인 Coleosporium neocacaliae의 녹포자세대로 동정되었다. 우리나라에서 잣나무에서 유일하게 보고되어 있던 C. eupatorii와 형태적 특징을 비교하였을 때, 특히 녹포자의 크기에서 상대적으로 큰 차이를 보여 구분이 가능하였다. 기존 문헌에는 광학현미경 관찰에서 녹포자의 표면구조가 단순히 "verrucose"로 기재되어 있으나, 주사전자현미경으로 관찰한 결과, 사마귀형 돌기는 3-4개의 고리를 가진 환상형 돌기로 밝혀졌다. 우리나라에서 C. neocacaliae의 녹포자세대는 경기도, 전라북도, 강원도 등의 한반도 중부지역에 광범위하게 분포하면서 해발 약 1,000 m내외의 고산지역에서도 발생하고 있었으며, 녹포자세대의 출현 시기는 4월 중순부터 6월 초순이었다.