Byung-Ryun Kim

Morphological and Molecular Characterization of Alternaria Isolates from Solanaceous Crops

Twenty five isolates of Alternaria were obtained from various solanaceous crops in Korea. For all isolates, morphological characteristics of the conidia were determined and compared with those of representative isolates of A. solani and A. tomatophila. A selection of the isolates and the representative Alternaria isolates were evaluated for Pathogenicity to potato, tomato, egg plant and red pepper. Molecular characteristics of 17 isolates of Alternaria inculding the representative isolates were determined using sequence analysis of IRS rDNA and histone H3 gene, and URP-PCR analysis. Based on morphological characteristics, the isolates from the solanaceous crops were grouped as identical or very similar to either A. tomatophila (ATO), A. solani (ASO), and unidentified Alternaria sp. (ASP). Isolates of ASO were moderately pathogenic to all the solanaceous crops tested, but ATO isolates were highly pathogenic to tomato and the ASP isolate was pathogenic only to potato. Among the molecular markers used in this study, the URP-PCR analysis was found to be appropriate for taxonomic resolution of these species. Based on the conidial morphology, pathogenicity test and molecular characteristics, A. tomatophila (early blight of tomato) could be distinguished from A. solani (early blight of potato), and the Alternaria sp. (ASP) from potato, which was closely related to ASO in conidial morphology, was considered as a new species.

Morphological Characteristics and URP-PCR Analysis of Hypocrea sp., a Weed Mould of Oyster Mushroom Cultivation

느타리버섯 균상에 발생하는 Hypocrea속 균의 분류학적 위치를 확립하기 위하여 유성세대 및 무성세대의 형태적 특징을 조사하였고, 국내 분리 균주의 RAPD, RFLP, URP-PCR 분석 등 분자생물학적 특징을 조사하였다. 1. 충남과 전남 일대의 8개 시, 군의 느타리 재배사에서 19 균주를 분리하였으며 이들 균주간의 형태적, 발생생태학적 변이는 없었고, 기존 보고된 Hypocrea 종들과는 다른 형태적 특징을 나타내었다. 2. Hypocrea 자좌의 크기는

Alternaria Leaf Spot Caused by Alternaria mali on Black Chokeberry in Korea

6.0{\sim}13.0{\times}3.0{\sim}11.0mm

Biocontrol Efficacy of Endophytic Bacteria Flavobacterium hercynim EPB-C313 for Control of Chinese Cabbage Clubroot

이었고, 위유조직으로 구성되어 있으며 대부분 군생하고 처음엔 백색이지만 성숙되면 노란빛을 띤 갈색을 나타내었다. 자낭각은 구형으로 크기가 평균

Analysis of the Factors for Decrease of Rice Stripe Disease in Chungnam Province

239.9{\times}204.1{\mu}m

Molecular Characterization of Small-Spored Alternaria Species

이었으며, 자낭에는 16개의 자낭포자(part ascospores)를 형성하였고, 자낭과 장낭포자의 크기는 각각

First Report of Two Colletotrichum Species Associated with Bitter Rot on Apple Fruit in Korea – C. fructicola and C. siamense

103.3{\times}4.9{\mu}m

Stalk Rot Caused by Fusarium thapsinum on Sorghum at Organic Paddy-upland Rotation System in Korea

와

Rhizopus Soft Rot on Lily Caused by Rhizopus oryzae in Korea

6.5{\times}4.7{\mu}m

Changes in Sensitivity Levels of Botrytis spp. Population Isolated from Lily to Fungicides and Control under Field Condition

이었다. 3. 무성세대의 phialide는 보통 Trichoderma virens와 유사한 형태로 모여서 형성되나 때때로 penicillate의 형태도 관찰되었다. T. virens형 phialide의 크기는