http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
Phytophthora Foot Rot of Deltoid Synurus Caused by Phytophthora cryptogea
Nam Young-Ju,Oh Sang-Keun,Kim Sun Ha,Moon Youn-Gi,Cho Weon-Dae,Kim Wan-Gyu 한국식물병리학회 2022 식물병연구 Vol.28 No.3
Foot rot symptoms were repeatedly observed on plants of deltoid synurus (<i>Synurus deltoides</i>) growing in a field of the Wild Vegetable Research Institute located in Pyeongchang, Korea during disease surveys in July 2020 and June 2021. The symptoms appeared as wilting of the plant leaves, and the plant stems and petioles at or above the soil line turned dark and rotted. The incidence of diseased plants in the field was 5‒10%. Five isolates of <i>Phytophthora</i> sp. were obtained from lesions of the diseased plants and investigated for their morphological and molecular characteristics. All the isolates were identified as <i>Phytophthora cryptogea</i> based on the morphological and molecular characteristics. Three isolates of <i>P. cryptogea</i> were tested for pathogenicity on deltoid synurus plants using artificial inoculation. All the tested isolates caused foot rot symptoms on the inoculated plants. The symptoms were similar to those observed in plants from the field investigated. To our knowledge, this is the first report of <i>P. cryptogea</i> causing Phytophthora foot rot in deltoid synurus.
Fluidigm 시스템을 이용한 고추 유전자원의 주요병 유전형 평가
금보라(Bora Geum),노나영(Na Young Ro),허온숙(On sook Hur),왕샤오한(Xiaohan Wang),최유미(Yu-Mi Choi),고호철(Hocheol Ko),이수경(Sukyeung Lee) 한국육종학회 2021 한국육종학회지 Vol.53 No.4
In this study, genotype analysis was conducted using the Fluidigm system with 13 SNP markers related to anthracnose, powderymildew, phytophthora root rot, cucumber mosaic virus (CMV), potyvirus, and tobacco mosaic virus (TMV) resistance. A total of 25,350 datapoints were obtained, 8.2% of which indicated resistance genotypes. Resources having perfect resistance genotype to each disease-related molecularmarker set were 58 accessions for anthracnose, 57 for powdery mildew, 246 for phytophthora root rot, and 765 for CMV. There was no resourcehaving a perfect resistance genotype of all three potyvirus-related molecular SNP markers including pvr1, pvr2 (123457), and pvr2 (689). Thirty-sevenaccessions for pvr1, 349 accessions for pvr2 (123457), and 23 accessions for pvr2 (689) were identified as resources with resistance genotype. No resource with the TMV-resistance genotype was found in this study. The resources with complex resistance genotypes of anthracnose and powderymildew were 55 accessions, and they were mainly Capsicum baccatum. Among these, seven accessions had a three-disease combined resistancegenotype with phytophthora root rot. Thirty-six accessions, 16 accessions, and nine accessions each had resistance genotypes of the three potyvirus-relatedmarkers. These resources also had CMV and phytophthora root rot resistance genotypes, and they were mainly Capsicum chinense. The statisticalanalysis considering the evaluated resistance genotypes, revealed that the anthracnose resistance genotype showed a tendency to be linked withpowdery mildew resistance genotype. The potyvirus-related marker pvr1 was positively correlated with Phytophthora root rot markers.
정선근 ( Sun Keun Jung ),김형무 ( Hyung Moo Kim ),고정애 ( Jung Ae Ko ),강미형 ( Mi Hyung Kang ) 전북대학교 농업과학기술연구소 2012 농업생명과학연구 Vol.43 No.1
Ten bacteria were isolated from ivy root to control ivy stem rot. In the plate test, JA508 was shown the strongest antifungal activity against Phytophthora cinnamomi and P. nicotianae, causal agents of Ivy stem rot. Control efficiencies were shown 66% for P. cinnamomi and 58% for P. nicotianae, when JA508 treated only. When JA508 and mandipropamid SC were treated alternately, control efficiencies were shown 92% for P. cinnamomi and 58% for P. nicotianae. JA508 was identified as Bacillus subtilis based on its cultural, morphological, biochemical characterization and 16S rDNA sequence analysis.
Phytophthora cryptogea에 의한 거베라 역병
지형진,김완규,이상엽,조원대 한국식물병리학회 1996 Plant Pathology Journal Vol.12 No.3
1992년부터 국내 주요 거베라 재배지역에서 Phytophthora속 균에 의한 역병이 발생하였다. 이병주는 뿌리조직이 파괴되어 급격히 시들며 말라죽는데 지제부의 잎자루는 수침상으로 검게 썩는 병징을 나타낸다. 총 47개 균주를 이병주에서 분리하여 균의 형태적, 배양적, 생리적 특성 등을 조사한 결과 모두 Phytophthora cryptogea로 동정되었다. 각 지역에서 수집된 20개 균주중 유성생식형 A1과 A2는 각각 8균주와 4균주였고 8개 균주는 불임성(sterile)이었다. 병원균은 7개 거베라 품종에 모두 강한 병원성을 나타내어 품종간 차이를 관팔할 수 없었다. P. cryptogea는 아직 국내에 기록된 바가 없는 식물병원균으로 거베라 역병균으로 처음 보고한다.
Phytophthora-Induced Diseases on Citrus in Jeju Island
Hyun, Jae-Wook,Lee, Seong-Chan,Kim, Kwang-Sik,Jee, Hyeong-Jin The Korean Society of Plant Pathology 2001 Plant Pathology Journal Vol.17 No.3
Phytophthora-induced diseases on citrus in Jeju island have been considered of minor importance because of the use as root stock of trifoliate orange, which is immune to Phytophthora. However, brown rot on fruit, which severely occurred in 1998 and 1999, has become a great threat to citrus production in the island. About one-half of the surveyed orchards were infected in 1998 and 4 out of 19 infected fields showed over 20% fruit infection rate. The disease was less severe in 1999, with an estimated infected area and total fruit reduction of 3,155 ha and 15,300 tons, respectively. Typical gummosis was also occasionally observed on cv. Shiranugi, which is mostly cultivated under plastic film houses. Two types of Phytophthora were consistently isolated from various plant parts, identified as P. citrophthora and P. nicotianae. The former was isolated from the aerial parts of the fruit, young leaf, and shoot in the fields. Meanwhile, the latter was only isolated from the basal stem showing gummosis in plastic film houses.
정선근 ( Sun Keun Jung ),김형무 ( Hyung Moo Kim ),고정애 ( Jung Ae Ko ),이왕휴 ( Wang Hyu Lee ) 전북대학교 농업과학기술연구소 2012 농업생명과학연구 Vol.43 No.1
This study was using 15 fungicides for the result of control of ivy stem rot. Dipping method was better than spraying method in pot experiment. Among fungicides tested, mandipropamid SC, cymoxanil+ethaboxam WP and ethaboxam+famoxadone WP suppressed mycelial growth of Phytophthora cinnamomi. mandipropamid SC and metalaxyl+copper oxychloride(Cu) WP effectively inhibited mycelial growth of P. nicotianae. 4 fungicides were shown strong antifungal activity against the pathogens. Especially mandipropamid SC was good at control efficient of stem rot caused by P. cinnamomi and P. nicotianae.
Phytophthora Rot on Luffa cylindrica Caused by Phytophthora nicotianae
Kwon Jin-Hyeuk,Jee Hyeong-Jin The Korean Society of Plant Pathology 2006 Plant Pathology Journal Vol.22 No.3
In 2004 and 2005, Phytophthora rot on Luffa cylindrica which had not been reported in Korea occurred in the experimental field at Gyeongsangnam-do Agricultural Research and Extension Services. The disease initiated on leaves and fruits of the plant with small watersoaked dark brown spots and progressed rapidly. The causal pathogen isolated from diseased tissues was identified as a Phytophthora sp. because of aseptate mycelia and zoospores released directly from sporangia. The fungus grew well on PDA and 10% V-8 juice agar showing an arachnoid or rosaceous colony pattern. Sporangia formed abundantly in water and were conspicuously papillate, noncaducous, ovoid to globose, and sized $26\sim62\times19\sim38{\mu}m$. The fungus was heterothallic as producing sexual reproduction structures only when mated with only A2 standard mating type strain. Oogonia and oospores were spherical, smooth walled, and measured as $20\sim28{\mu}m\;and\;16\sim24{\mu}m$, respectively. Oospores were aplerotic and antheridia were amphigynous, unicellula and spherical. Chlamydospores were globose and $20\sim38{\mu}m$ in diameter. Optimum temperature for growth was around $28\sim30^{\circ}C$. The fungus caused similar symptoms on artificially inoculated plant and could be re-isolated thereby proving Koch's postulation. Based on the mycological criteria investigated in this study, the causal fungus of Luffa sylindrica rot was identified as Phytophthora nicotianae. This is the first report of Phytophthora rot of Luffa cylindrica caused by P. nicotianae in Korea.
Phytophthora Rot of Broad Bean(Vicia faba) Caused by Phytophthora nicotianae in Korea
Kwon, Jin-Hyeuk,Jee, Hyeong-Jin,Shen, Shun-Shan,Chae, Yun-Seok The Korean Society of Plant Pathology 2007 Plant Pathology Journal Vol.23 No.1
Phytophthora rot on broad bean(Vicia faba) occurred in the experimental field at Gyeongsangnam-do Agricultural Research and Extension Services from 2004 to 2006. The fungus isolated from the diseased plants grew well on potato dextrose agar and showed an arachnoid or rosaceous colony pattern. Sporangia were conspicuously papillated, noncaducous, ovoid to globose, and $25-64{\times}18-44{\mu}m$ in size. Oogonia and oospores were spherical and measured as 20-32 ${\mu}m$ and 16-28 ${\mu}m$ in size, respectively. Oospores were relatively small and aplerotic. Antheridia were amphigynous, spherical, and unicellula. Chlamydospores were globose and 18-40 ${\mu}m$ in size. Optimum temperature for growth was about $28^{\circ}C$ on potato dextrose agar. The disease occurred in all parts of the plant including roots, stems, leaves and pods in the field. The symptoms similar to those of naturally infected plants were induced by artificial inoculation and the pathogen was re-isolated from the plant. On the basis of mycological and pathological characteristics, the causal pathogen of broad bean rot was identified as Phytophthora nicotianae. This is the first report of Phytophthora rot of broad bean caused by P. nicotianae in Korea.