• 한국자원식물학회:학술대회논문집
• /
• 한국자원식물학회 2019년도 춘계학술대회
• /
• pp.69-69
• /
• 2019

Pepper (Capsicum spp.) is one of the main quality features of this crop because of its sense of pungency, which is due to the presence of capsaicinoids. This compound is synthesized as a secondary metabolite and found only in the placental tissue of spicy fruit (Suzuki et al., 1980). Stewart et al. (2005) concluded that Pun1 encodes for the acyltransferase AT3 and they demonstrated its involvement in capsaicinoids metabolism. It was analyzed that the capsaicinoids content and PUN1 genotype in pepper genetic resources which were selected with excellent phenotype in field evaluation. The number of pepper genetic resources analyzed was 135, and species were C. annuum, C. baccatum, C. chinense, C. frutescens. The content of capsaicinoid ranged from 0 mg/100g to 828 mg/100g. The content of 0 mg/100g was the sweet pepper type, the highest content is IT 158530, the capsaicinoid content of which was 828 mg/100g and species was C. annuum. PUN1 gene analysis showed 117 pungent, 5 hetero, and 13 non-pungent. PUN1 analysis showed that 5 out of 13 non-pungent accessions were detected with low levels of capsaicinoid.

• 농업과학연구
• /
• 제46권1호
• /
• pp.163-172
• /
• 2019

Ixeris dentata is a perennial plant belongs to Compositae family and it has been considered as a potential therapeutic agent in many biological activities like detoxification, elimination of blood stasis, anti-inflammatory, and analgesia. The I. dentata used in this experiment was collected in four areas of Yangpyeong, Dangjin, Chuncheon and Goesan, then transplanted to the farm of Department of Herbal Crop Research in National Institute of Horticultural and Herbal Science. The growth characteristics of I. dentata were investigated after harvesting. The aboveground biomass of plants collected from Chuncheon area was exhibited best, and the biomass of root in YangPyeong was showed best as 3.65 g/plant in dry weight. Based on the HPLC analysis, the leaf of I. dentata collected from Dangjin area was highest in carotenoids contents ($1,213{\mu}g/g$ dry weight), and the leaf of Chuncheon area was exhibited maximal phenolic compounds ($1,918{\mu}g/g$ dry weight). The results of this study could provide fundamental formation for selection of standard varieties of I. dentata and development of functional material by analysis of the growth characteristics and the contents of carotenoids and phenolic compounds.

• 한국작물학회:학술대회논문집
• /
• 한국작물학회 2018년도 춘계학술대회
• /
• pp.25-25
• /
• 2018

• Journal of Biosystems Engineering
• /
• 제29권2호
• /
• pp.109-120
• /
• 2004

To obtain basic information for precision agriculture, spatial variability of rice growth condition was evaluated in 100m ${\times}$100m paddy field. The rice growth condition of four hundred locations in the field were investigated to analyze the spatial variability of their properties ; SPAD, plant length and tiller number. Geostatistical analysis was carried out to examine within-field spatial variability using semivariograms and kriged maps as well as descriptive statistics. Descriptive statistics showed that the coefficient of variation for SPAD, plant length, and tiller number exceeded 5.70 %, suggesting a relatively high variability. Geostatistical analysis indicated a high spatial dependence for all the properties except for the second tiller number. The range of spatial dependence was about 20 m for SPAD, plant length, and tiller number. Based on the results of spatial dependence, kriged maps were prepared for the properties to analyse their spatial distribution in the field. The results reflected the history of field management. In conclusion, the need for site-specific field management and possibility of precision agriculture were demonstrated even in an almost flat paddy field.

• Journal of Biosystems Engineering
• /
• 제35권6호
• /
• pp.393-400
• /
• 2010

Uniform and rapid pre-drying of mandarin is important to improve the storage quality. The aim of this study was to suggest the basic design of forced ventilated pre-drying facility for mandarin by thermal flow analysis using computational fluid dynamics software (FLUENT 6.2). Developed CFD simulation model was verified by comparison with experimental data. Airflows and temperature distributions in the five conceptional designs including existing ordinary temperature storage rooms were analyzed and appropriate basic design was determined. Analysis of the effect of arrangement of windows and exhaust fans on thermal flow in facility was carried out for more detailed design. The results of this investigation showed that the predicted airflow velocity by CFD simulation showed a good agreement with the measured value and optimum design condition for simulated forced ventilated pre-drying facility of mandarin has two exhaust fans and two windows on both sidewalls and cover on loaded mandarin.

• 한국버섯학회지
• /
• 제22권2호
• /
• pp.37-47
• /
• 2024

Fluorescent bacteria were isolated from sporocarps that browned into various mushrooms during survey at places of the production in Korea. We examined the pathogenicity, biodiversity, and genetic characteristics of the 19 strains identified as Pseudomonas tolaasii by sequence analysis of 16S rRNA and White Line Assay. The results emphasize the importance of rpoB gene system, fatty acid profiles, specific and sensitive PCR assays, and lipopeptide detection for the identification of P. tolaasii. As a result of these various analyses, 17 strains (CHM03~CHM19) were identified as P. tolaasii. The phylogenetic analysis based on the 16S rRNA gene showed that all strains were clustered closest to P. tolaasii lineage, two strains (CHM01, CHM02) were not identified as P. tolaasii and have completely different genetic characteristics as a result of fatty acids profile, specific and sensitive PCR, lipopetide detection, rpoB sequence and REP-PCR analysis. Pathogenicity tests showed 17 strains produce severe brown discolouration symptoms to button mushrooms and watersoaking of sporophore tissue within three days after inoculation. But two strains did not produce discolouration symptoms. Therefore, these two strains will be further investigated for correct species identification by different biological and molecular characteristics.

• 농업과학연구
• /
• 제41권4호
• /
• pp.455-460
• /
• 2014

In this study, structural behavior of plastic greenhouse foundation was investigated using rational finite element modeling for structures which have different material properties each other. Because the concrete foundation of plastic greenhouse and soil which surround and support the concrete foundation have very different material property, the boundary between two structures were modeled by a interface element. The interface element was able to represent sliding, separation, uplift and re-bonding of the boundary between concrete foundation and soil. The results of static and dynamic analysis showed that horizontal and vertical displacement of concrete foundation displayed a decreasing tendency with increasing depth of foundation. The second frequency from modal analysis of structure including foundation and soil was estimate to closely related with wind load.

• 한국작물학회:학술대회논문집
• /
• 한국작물학회 2006년도 Grop Science and Biotechnology in the 21st Century
• /
• pp.32.1-32.1
• /
• 2006

• 한국식물생명공학회:학술대회논문집
• /
• 한국식물생명공학회 2003년도 식물바이오벤처 페스티발
• /
• pp.191-191
• /
• 2003

• 한국생물환경조절학회:학술대회논문집
• /
• 한국생물환경조절학회 2004년도 춘계학술대회 논문집
• /
• pp.155-158
• /
• 2004