http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
송형근 ( Hyung-geun Song ),조유성 ( Yu-sung Cho ),양서연 ( Seo-yeon Yang ),조쉬알파나 ( Alpana Joshi ),이지훈 ( Ji-hoon Lee ) 한국환경농학회 2023 한국환경농학회 학술대회집 Vol.2023 No.0
The rhizosphere known as microbial habitat is the area of root-adjacent soil that is directly affected by substances exuded from the roots, such as the root exudates. It has been known that plant diseases affect plants and the rhizosphere microbial community. The bacterial soft rot caused by Pectobacterium carotovorum (formerly Erwinia carotovora) is one of the most important diseases of Chinese cabbage (Brassica rapa L.). In this study, the Chinese cabbage was inoculated by P. carotovorum SCC1 to induce bacterial soft rot. And the rhizosphere soil was analyzed to evaluate changes in the rhizosphere microbial community using Illumina iSeq 100 platform. The typical symptoms of soft rot in the disease-induced group (BRD) were detected. From the microbiome analysis, Proteobacteria, Actinobacteria, and Planctomycetes were the dominant phyla in all the samples. Also, the class Clostridia which was known to be related to the P. carotovorum was found in BRD3. Alpha-diversity showed no significant difference between control and disease groups. Also, in beta-diversity analysis, there were no significant differences between the two groups, but we found that one of the disease samples, BRD3 exhibited dissimilarity with other samples in PCoA and NMDS analyses based on Yue & Clayton distance matrices. We presumed that the rhizosphere microbial community was changed due to the plant’s soft rot disease. Collectively from the results, this study showed a significant ecological relationship between host plants’ disease and rhizosphere bacterial community.
송형근 ( Hyung-geun Song ),조유성 ( Yu-sung Cho ),양서연 ( Seo-yeon Yang ),조쉬알파나 ( Alpana Joshi ),이지훈 ( Ji-hoon Lee ) 한국환경농학회 2023 한국환경농학회 학술대회집 Vol.2023 No.0
Plants may change rhizosphere microbiota in response to pathogen infection, and the rhizosphere microbial communities are closely associated with plant roots. The change of rhizosphere microbial community can be beneficial to the host plants. The ‘cry for help’ hypothesis is that when a plant is invaded by a pathogen, it changes root exudate and affects the microbial community. In this study, a plant pathogenic bacterium (Xanthomonas euvesicatoria) was inoculated in soil and red peppers (Capsicum annuum L.) to induce bacterial spot disease. The rhizosphere soil was collected after 53 days of cultivation and V4 region of bacterial 16S rRNA gene of rhizosphere soil was analyzed using Illumina iSeq 100 system. Analysis of the rhizosphere microbial communities was conducted using Mothur. Bacterial alpha diversity of rhizosphere soil of bacterial spot disease-pepper was significantly smaller than the normal pepper soils. Also, the separation of bacterial communities between control and disease plants was observed through NMDS, PCoA, and LefSe analyses. These results provided ecological insight into the relationship between plant disease and the rhizosphere microbiota of pepper and represented the rhizosphere microbial flora of pepper was altered by bacterial spot disease.
바깥귀길에서 발생한 상피-근상피암종의 세포소견 - 1예 보고 -
이호창,송형근,최영석,이옥준,Lee, Ho-Chang,Song, Hyung-Geun,Choi, Young-Seok,Lee, Ok-Jun The Korean Society for Cytopathology 2008 대한세포병리학회지 Vol.19 No.1
Epithelial-myoepithelial carcinoma (EMC) is a low grade malignant neoplasm that commonly occurs in the parotid gland. Recently, we investigated a case of EMC that occurred in the external auditory canal (EAC) in a 35-year-old male, and this tumor was initially diagnosed as pleomorphic adenoma. The difficulty associated with diagnosing EMC by aspiration cytology arises from both the rare incidence of this tumor and the overlapping spectrum of cytological features found in various salivary gland tumors, such as pleomorphic adenoma, basal cell adenoma and adenoid cystic carcinoma.
Laser Doppler Flowmetry를 이용한 치은혈류량에 관한 연구
김형수,이장희,송형근,김병옥,한경윤,Kim, Hyung Soo,Lee, Zang-Hee,Song, Hyung-Geun,Kim, Byung-Ock,Han, Kyung-Yoon 대한치주과학회 1998 Journal of Periodontal & Implant Science Vol.28 No.2
The periodontal health has been evaluated clinically by various epidemiological indices, and in researches by measurement of gingival crevicular fluid. Laser Doppler flowmetry is a reliable and objective method that allows immediate measurement of erythrocyte flux in approximately one cubic mm of the capillary bed without disturbing the tissues. The purpose of the present study was to determine whether human gingival blood flow was different according to measuring area, measuring time, and sex or not. Forty volunteers with good general and periodontal health, aged early twenties and unmarried, were selected. Laser Doppler flowmetry($floLAB^{(R)}$, Moor Instruments Ltd., England) was applied to measure the gingival blood flow of marginal gingiva, interdental papilla, attached gingiva and alveolar mucosa. The blood flow of interdental papilla was measured at 9-10 AM, 1-2 PM, and 5-6 PM. The difference of blood flow according to measuring area and measuring time was statistically analyzed by one way AOVA and Dunkan test, and the difference of blood flow between men and women was statistically analyzed by t-test. (1) Mean blood flow was significantly higher in alveolar mucosa than in the gingiva(p<0.05), and there was no significant difference in blood flow between marginal gingiva and interdental papilla(p>0.1). (2) Mean blood flow was significantly higher at 5-6 PM than at 9-10 AM and 1-2 PM(p<0.05). But there was no significant difference in gingival blood flow between 9-10 AM and 1-2 PM(p>0.1). (3) There was no significant difference in gingival blood flow between men and women(p>0.1). The above results suggest that the measurment of gingival blood flow using laser Doppler flowmetry may be clinically applicable to early determination of gingival inflammation and evaluation of healing status, but further studies are necessary to standardize and simplify the measuring procedure.