• 한국자원식물학회지
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• 제33권4호
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• pp.398-403
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• 2020

둥근대이끼(P. platyphyllum)는 산주목이끼과 산주목이끼 속에 속하는 선류 식물이다. 중국, 일본, 유럽, 북한에 분포하고 있다. 특히, 북한 지역에는 관모봉, 금강산, 묘향산, 차일봉에 분포하는 것으로 알려져 있었으나, 남한 지역에는 2017년 전라북도 완주군 운주면 산북리 대둔산 수락계곡에 자생하고 있음이 처음 확인되었다. 식물체의 색깔은 녹색에서 암녹색이고 윤기가 난다. 줄기에는 중심속이 발달해 있다. 가지는 불규칙하고, 가지잎은 편평하게 붙는다. 잎은 난상 피침형으로 2.0~2.5 × 1.0~1.4 mm이며, 비대칭하는 것이 특징이다. 잎 중앙세포는 80~127 × 10~16 ㎛로서 형태는 장사방형이다. 본 연구에서 둥근대이끼의 형태학적 기재와 동정을 위한 주요 형태 형질의 사진, 도해 및 검색표를 제시하였다.

• 한국작물학회:학술대회논문집
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• 한국작물학회 2017년도 9th Asian Crop Science Association conference
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• pp.113-113
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• 2017

Downy mildew (DM), caused by several species in the Peronosclerospora and Scleropthora genera, is a major maize (Zea mays L.) disease in tropical or subtropical regions. DM is an obligate parasite species in the higher plants and spreads by oospores, wind, and mycelium in seed surface, soil, and living hosts. Owing to its geographical distribution and destructive yield reduction, DM is one of the most severe maize diseases among the maize pathogens. Positional cloning in combination with phenotyping is a general approach to identify disease resistant gene candidates in plants; however, it requires several time-consuming steps including population or fine mapping. Therefore, in the present study, we suggest a new combination strategy to improve the identification of disease resistant gene candidates. Downy mildew (DM) resistant maize was selected from five cultivars using the spreader row technique. Positional cloning and bioinformatics tools identified the DM resistant QTL marker (bnlg1702) and 47 protein coding genes annotations. Eventually, 5 DM resistant gene candidates, including bZIP34, Bak1, and Ppr, were identified by quantitative RT-PCR without fine mapping of the bnlg1702 locus. Specifically, we provided DM resistant gene candidates with our new strategy, including field selection by the spreader row technique without population preparation, the DM resistance region identification by positional cloning using bioinformatics tools, and expression level profiling by quantitative RT-PCR without fine mapping. As whole genome information is available for other crops, we propose applying our novel protocol to other crops or for other diseases with suitable adjustment.

• Journal of Species Research
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• 제4권2호
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• pp.152-158
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• 2015

Dendranthema boreale and D. indicum are easily distinguished from other Korean Dendranthema spp. by having yellow flowers. We have found a putative new taxon of Dendranthema having white flowers, except for sharing most characters with Dendranthema boreale. The chloroplast (cp) genome of the putative new taxon of Dendranthema, Dendranthema sp. K247003, registered in National Agro-Biodiversity Center (ABC), was completely characterized as a genetic barcode. The cp-genome of Dendranthema sp. K247003 was 151,175-bp in size: LSC was 82,886-bp, IR 24,971-bp, SSC 18,347-bp. The cp-genome of Dendranthema sp. K247003 contains 113 genes and 21 introns consisted of 79 protein coding genes, 4 RNA genes, and 30 tRNA genes, with 20 group II introns and one group I intron. Some of the genes and there introns were duplicated in IR. The cp-DNA of Dendranthema sp. K247003 is distinguished from that of D. boreale IT121002 by 67 SNPs in genic regions of 24 protein coding genes and by a 9-bp INDEL in ycf1. Further cp-DNA study will give us better information on genetic markers of Dendranthema species.

• 한국자원식물학회:학술대회논문집
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• 한국자원식물학회 2001년도 추계정기 학술발표회 초록집
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• pp.25-32
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• 2001

Potatoes have been recognized for a long time as one of the major food crops as well as horticultural crops. Potato production as a table food has been decreased in developed countries, while it has been steadily increased in the third world countries for it importance as food source. It is a new trend to look for the food, not only as a feeding crop but also healthy food. It is also time for the potato producers to look for the potato having high economic value as found in medicinal plants. There are great diversities in potato species, indicating that valuable compounds can be found in different amounts, depending on potato species. We screened the cultivars, breeding clones, and germplasms based on the vitamin C, Vitamin E, antioxidant compounds, diverse sugar types, important amino acids, and other valuable compounds. We could select the breeding clones KC003, 98Wl17, 99j717, and Vally 8 (A group) due to their high levels of antioxidant compounds, and it can be said that most of the red and purple colored potato clones belong to the A group. In the contents of essential amino acids, ‘Taebook Valley’,‘Summer Valley’ and other breeding clones were found to be high in amount. We also made crosses between breeding clones with high biological function and low agronomic traits and low biological function with high quality in agronomic characteristics . The patterns of genetic trends of these offsprings in comparison with their parents will be reported as well. And the potential of using potato as antibody production of anti-cancer will be discussed.

• 한국어류학회지
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• 제26권4호
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• pp.345-348
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• 2014

쏨뱅이목 날개줄고기과에 속하는 Aspidophoroides monopterygius 6개체 (표준체장 151.4~171.2 mm)가 강원도 삼척과 강릉 연안에서 동해구외끌이중형저인망에 의해 채집되었다. 본 종은 긴 체형, 1개의 등지느러미, 입이 몸의 전방에 위치, 두부에 수염이 없으며 주둥이에 몸의 후방을 향하는 날카로운 비골극이 있는 것이 특징이다. 본 종은 민어치(Anoplagonus occidentalis)와 형태적으로 매우 유사하지만, 비골극을 가지는 점에서 차이가 있다. 우리나라에서 처음 보고되는 본 종의 국명으로 "악어줄고기"를 제안한다.

• 보존과학연구
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• 통권19호
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• pp.133-158
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• 1998

There are about 2,000 species of termite in the World, but one species of termite inhabits in the southern part of Korean peninsula. Termites are social insects that live in colonies. The colonies are composed of king, queen, soldiers and workers. Termite food consists of cellulose obtained from wood. Protozoa in their digestive tracts convert the cellulose into usable food. Korean termite is a subspecies of Reticulitermes speratus Kolbe, Rhinotermitidae. It's subterranean termite and the scientic name is R. speratus kyushensis Morimoto. The subterranean termite must nest in the soil in order to survival, and infest soft-wood which contact with the soil near the nest. There are several ways which subterranean termite infestations can be noticed. Atcertain times of the year during daylight hours, king and queen termites emerge from the colonies. The propose of these flight is to establish new colonies. The termite is a decomposer of biological ecosystem, but an invader in the preservation of cultural properties as like wood buildings. There are serveral control methods for the prevention of wood building from termite's damages. Those are biological control, ecological control, physical control and chemical control. Ecological and Physical control are the best methods in the new constructing wood-building. Fumigation which is a method of chemical control, is the best method for the building damaged by the termite. After the fumigation, we have totake wood & soil treatments for the building and nearby in order not to be reinvaded by the termites.

• Parasites, Hosts and Diseases
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• 제42권3호
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• pp.93-119
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• 2004

Acanthamoeba and Naegleria are widely distributed in fresh water, soil and dust throughout the world, and cause meningoencephalitis or keratoconjunctivitis in humans and other mammals. Korean isolates, namely, Naegleria sp. YM-1 and Acanthamoeba sp. YM-2, YM-3, YM-4, YM-5, YM-6 and YM-7, were collected from sewage, water puddles, a storage reservoir, the gills of a fresh water fish, and by corneal washing. These isolates were categorized into three groups based on the mortalities of infected mice namely, highly virulent (YM-4), moderately virulent (YM-2, YM-5 and YM-7) and nonpathogenic (YM-3). In addition, a new species of Acanthamoeba was isolated from a freshwater fish in Korea and tentatively named Korean isolate YM-4. The morphologic characters of its cysts were similar to those of A. culbertsoni and A. royreba, which were previously designated as Acanthamoeba group III. Based on experimentally infected mouse mortality, Acanthamoeba YM-4 was highly virulent. The isoenzymes profile of Acanthamoeba YM-4 was similar to that of A. royreba. Moreover, an anti-Acanthamoeba YM-4 monoclonal anti-body reacted only with Acanthamoeba YM-4, and not with A. culbertsoni. Random amplified polymorphic DNA marker analysis and RFLP analysis of mitochondrial DNA and of a 188 small subunit ribosomal RNA, placed Acanthamoeba YM-4 in a separate cluster based on phylogenic distances. Thus Acanthamoeba YM-4 was identified as a new species, and assigned Acanthamoeba sohi. Up to the year 2002 in Korea, two clinical cases were found to be infected with Acanthamoeba spp. These patients died of meningoencephalitis. In addition, one case of Acanthamoeba pneumonia with an immunodeficient status was reported and Acanthamoeba was detected in several cases of chronic relapsing corneal ulcer, chronic conjunctivitis, and keratitis.

• ALGAE
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• 제36권2호
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• pp.137-146
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• 2021

Intertidal macroalgae are regularly exposed to hypo- or hypersaline conditions which are stressful. However, red algae in New Zealand are generally poorly studied in terms of salinity tolerance. Consequently, two native (Bostrychia arbuscula W. H. Harvey [Ceramiales], Champia novae-zelandiae [J. D. Hooker & Harvey] Harvey [Rhodymeniales]) and one introduced red algal taxon (Schizymenia spp. J. Agardh [Nemastomatales]) were exposed for 5 days in a controlled salt stress experiment to investigate photosynthetic activity and osmotic acclimation. The photosynthetic activity of B. arbuscula was not affected by salinity, as reflected in an almost unchanged maximum quantum yield (F_v/F_m). In contrast, the F_v/F_m of C. novae-zelandiae and Schizymenia spp. strongly decreased under hypo- and hypersaline conditions. Treatment with different salinities led to an increase of the total organic osmolyte concentrations with rising salt stress in B. arbuscula and Schizymenia spp. In C. novae-zelandiae the highest organic osmolyte concentrations were recorded at S_A 38, followed by declining amounts with further hypersaline exposure. In B. arbuscula, sorbitol was the main organic osmolyte, while the other taxa contained floridoside. The data presented indicate that all three red algal species conspicuously differ in their salt tolerance. The upper intertidal B. arbuscula exhibited a wide salinity tolerance as reflected by unaffected photosynthetic parameters and strong sorbitol accumulation under increasing salinities, and hence can be characterized as euryhaline. In contrast, the introduced Schizymenia spp. and native C. novae-zelandiae, which preferentially occur in the mid-intertidal, showed a narrower salinity tolerance. The species-specific responses reflect their respective vertical positions in the intertidal zone.

• 환경생물
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• 제20권4호
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• pp.347-354
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• 2002

갑천변(가수원교-원촌교 구간)은 건설교통부에서 확정한 대전 서남부권 신도시 개발과 대전광역시에서 계획하고 있는 갑천변 고속화도로가 건설될 예정이어서 급격한 자연환경의 악화가 예상되는 지역이다. 또한 신도시와 천변 고속화도로가 건설된 이후 심각한 환경오염을 야기시켜, 본 조사지역의 하류인 공단지역에 막대한 영향을 줄 것으로 예상된다. 본 조사는 2001년 8월부터 2002년 6월까지 11개월간 대전 갑천변의 가수원교에서 원촌교까지의 지역을 대상으로 미소생물상과 수온, 기온 및 수중 pH를 조사하였다. 본 조사지역의 미소생물은 31과, 58속, 105종, 17변종, 3품종 등 125종류로 밝혀졌으며, 이 중 식물성 미소생물은 23과, 40속, 89종, 10변종, 3변종 등 108종류이고, 동물성 미소생물은 8과, 12속, 16종, 1변종 등 17종류였다. 본 조사지역의 수중 수소 이온농도는 7.10∼9.98로 많은 편차를 보였으며, 특히 인구밀집지역인 가수원교 지점과 만년교 지점이 높은 수치를 나타내었다. 다양한 수생식물과 습지식물이 분포하고 있어서 수질정화에도 한 몫을 하고 있으며 수중에는 다양한 미소생물이 분포하고 있어 자연하천으로서의 능력을 충분히 발휘하고 있다. 또한 수중 수소이온 농도는 아직 걱정할 만한 정도의 수치를 나타내지는 않았다. 특히, 대전광역시가 약 665억원을 들여 하천관리 종합계획 ('99∼2003)을 실시하고 있는 이즈음 시 당국은 본 연구를 토대로 보다 친환경적이고 안정적으로 수질을 유지할 수 있는 방법을 모색하여야 할 것이다.

• 농업과학연구
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• 제9권1호
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• pp.275-283
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• 1982

우리나라 주요작물(主要作物)의 종자전염균(種子傳染菌)에 대(對)한 기초자료(基礎資料)를 얻기 위하여 벼, 콩, 보리, 참깨와 시판중(市販中)인 12종(種)의 주요채소류(主要菜蔬類)에서 모두 144개(個)의 종자시료(種子試料)를 수집(收集)하여 종자건전검사(種子健全檢査)를 하였던 바 다음과 같은 결과(結果)를 얻었다. (1) 벼, 콩, 보리, 종자(種子)에서는 각각(各各) 18종(種), 15(種), 7(種)의 진균(眞菌)이 검출(檢出)되었다. 벼의 변색종자(變色種子)에서는 Epicoccum purpurascens, Pyricularia oryzae, Trichoconiella padwickii가 많이 검출(檢出)되었고, 콩종자(種子)에서는 탄저병균(炭疽病菌)인 Macrophomina phaseolina가 우리나라의 콩에서는 처음으로 검출(檢出)되었다. (2) 참깨종자(種子)에서는 12종(種)의 진균(眞菌)이 검출(檢出)되었으며 그 중(中) Alternaria속(屬)과 Corynespora cassiicola가 많이 검출(檢出)되었다. (3) 12종(種)의 시판(市販) 채소종자(菜蔬種子)에서는 모두 21종(種)의 진균(眞菌)이 검출(檢出)되었는데 특(特)히 Alternaria속(屬), Colletotrichum속(屬)과 Fusarium속(屬)이 많이 검출(檢出)되었다. 공시(供試)한 시판(市販) 채소종자(菜蔬種子)의 시료중(試料中)에는 각종(各種) 병원균(病原菌)에 심(甚)하게 오염(汚染)되어 낮은 발아율(發芽率)과 유묘감염(幼苗感染)을 일으키는 것이 있었다.