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모황성,장길수,황지은,전수경,김병수 한국원예학회 2015 Horticulture, Environment, and Biotechnology Vol.56 No.1
Pepper accessions with promising adaptations to the Korean growing environment were selected from Capsiucm annuum, C. frutescens, C. baccatum, and C. chinense. ‘Cherry Sweet,’ ‘Papri Sweet,’ and ‘Papri Mild’ accessions of C. annuum were selected for their fresh fruit quality. The fruit of ‘Cherry Sweet’ and ‘Papri Mild’ matured into a bright red color, with a high American Spice Trade Association (ASTA) color value, while the fruit of ‘Papri Sweet’ was characterized by a good taste and chewing texture. KC01299, KC01333, KC01338, and KC01345 accessions of C. frutescens had relatively low ASTA color values, but were highly pungent with a capsaicinoid content similar to or higher than Tabasco (375.5 mg·100 g-1) and 3 to 5 times that of ‘Cheongyang’ (103.3 mg·100 g-1), which is a popular Korean hot pepper cultivar. The three selected C. baccatum accessions (KC01739, KC00625, and KC00628) were tolerant to powdery mildew and viruses, with KC01691 and KC00625 having high sugar content. A good diversity in fruit shape and chemical quality components was found among the selected C. chinense accessions. The fruit of KC01693 (with a temporary RDA genebank number 800080) were light emerald green when immature and ivory to ripe apricot color when mature, with a high sweet taste and the characteristic aroma of C. chinense. The mature fruits contained similar levels of capsaicinoids as ‘Cheonyang,’ and had the highest sugar content of all tested accessions in this study. The red and orange lines bearing Korean chile pepper type fruits with tolerance to powdery mildew and viruses were selected from PI224445 (KC00163). The red fruit selection had the highest ASTA color value among all tested accessions, with the appropriate pungency for making Korean Kimchee. Bhut Jolokia had the highest ranking for capsaicinoid content, but its fruit set was poor. A red Habanero, KC01787, was selected for productivity, high capsaicinoid content, and tolerance to viruses in the field.
New Sources of Resistance to Phytophthora capsici in Capsicum spp.
모황성,김소영,Khin Pa Pa Wai,Muhammad Irfan Siddique,유희주,김병수 한국원예학회 2014 Horticulture, Environment, and Biotechnology Vol.55 No.1
Phytophthora blight caused by Phytophthora capsici is a dangerous disease in pepper that may devastate thecrop unless properly controlled when environmental conditions are favorable for outbreak of the disease and the varietiesgrown are susceptible. Although many pepper varieties released nowadays are resistant to the disease to a certain degree,continuous search for sources of resistance to the disease is necessary to cope with buildup of virulence and pathotypespecialization against the resistance genes deployed. Two hundred accessions of pepper germplasm received from theRDA gene bank, and 17 accessions received as sources of resistance to P. capsici from the University of Georgia (UG)were grown for seed increase in 2011. The accessions successfully increased and some others were tested for resistanceagainst a highly virulent strain (Pc018) of P. capsici isolated from an infected plant of a resistant commercial cultivarin Youngyang from 2011 to 2012. The PI201237-3, PI201237-4, PI566811-1, PI566811-2, PI593573-1, PI593573-3, andPI640532-1 of the UG accessions, KC00807-1 and KC01744 of C. chinense, KC00937 received from NationalHorticultural Research Institute in 2003, and KC01322 introduced from Laos in 2007 were resistant enough toexploit for breeding resistance. The resistance sources are new additions to the sources of resistance to P. capsici,tested to domestic strain of P. capsici and readily available in Korea.
유기농 인삼과 관행 인삼의 토양화학성 및 진세노이드 함량 비교
모황성,임진수,유진,박기춘 한국유기농업학회 2015 韓國有機農業學會誌 Vol.23 No.3
Organic ginseng farming has rapidly increased in response to consumer demand for a safe product which improves health. Differences in soil nutrient concentration and ginsenoside content between organic and conventional ginseng farming have, however, not yet been properly studied. Therefore the aim of the present study was to compare soil nutrient concentration and ginsenoside content between these two farming systems. NO3-N, P2O5, and K were significantly different between organic and conventional ginseng farming. The total content of ginsenoside and individual ginsenoside components were higher in organically grown ginseng than in ginseng from conventional farming, although there is no significant difference. Particularly, protopanaxadiol saponins were higher than protopanaxatriol saponins in ginseng from organic farming compared to ginseng produced by conventional farming. NO3-N content in soils showed a negative correlation with the content of ginsenosides Rb2 and Rd. In addition, P2O5 showed a negative correlation with ginsenosides Rb1, Rc, and PD/PT ratio. Organic matter showed a positive crrelation with ginsenosides Re. To increase the ginsenoside content of ginseng, we recommend increasing organic matter and decreasing NO3-N and P2O5 contents in the soil.
인삼 하우스 직파재배 시 파종입수 및 재식밀도가 입모율 향상에 미치는 영향
모황성,박홍우,장인배,유진,박기춘,현동윤,이응호,김기홍 한국약용작물학회 2014 한국약용작물학회지 Vol.22 No.6
This study was performed to investigate the effects of sowing density and number of seeds sown on the emergencerate and growth characters of Panax ginseng C. A. Meyer under direct sowing cultivation in a blue plastic greenhouse. Ginseng seedlings, derived from seeds sown directly at different densities (90, 108, 135, and 162 seeds per 1.62 ㎡), were cultivatedin sandy loam soil within a blue plastic greenhouse. In contrast to the emergence rate, which decreased with anincrease of sowing density, number of survival plant showed an increasing trend. Interestingly, the emergence and numberof survival plant were significantly enhanced when 2 or 3 seeds were sown per hole compared with when one seed was sownper hole. Growth of the aerial parts of ginseng were not markedly influenced by sowing density or the number of seeds sown. However, chlorophyll content (SPAD values) increased with an increase in sowing density. Root parameters, such as rootlength, diameter, and weight, and the number of lateral roots decreased with an increase in sowing density, but were notnoticeably influenced by the number of seeds sown. Total saponin content was the highest in the treatment plot containing135 seeds. Similarly, the content of each ginsenoside was also tended to be higher in this treatment than in other treatmentplots. On the basis of the results obtained in this study, it was possible to determine the optimal sowing density and seednumber for the direct sowing cultivation of ginseng in blue plastic greenhouse.
생육 초기에 투광량 증가가 인삼생육 및 지상부 병 발생에 미치는 영향
모황성,장인배,유진,박홍우,박기춘 한국약용작물학회 2015 한국약용작물학회지 Vol.23 No.4
This study was performed to investigate the effects of enhanced light transmission on plant growth, photosynthetic ability, and disease tolerance to leaf blight, anthracnose in ginseng (Panax ginseng C. A. Meyer, Araliacease family) during the early growth stage (April to June). The photosynthetic ratio, stomatal conductance, and stem diameter of plants grown under a shade net with 15% light transmission rate showed an increasing trend compared to the control plants (5% light transmission rate) although the growth of the aerial parts were not influenced significantly. Plant height, stem length, and leaf length of treated plants were not significantly different from those of the control plants. Root parameters, such as root length, diameter, and weight of treated plants increased significantly compared to the control. Yield performance (187.4 ㎏• 10 a−1) of treated plants was 55.5% higher than that of the control (150.4 ㎏• 10 a−1). Additionally, disease severity scores of treated plants were lower than those of the control plants, revealing higher survival rates. To retain high yield potential and enhance the level of disease tolerance in ginseng, we suggest the increase of light transmission rate during the early growth stage.
인삼 하우스 직파재배시 파종밀도, 혈당 파종립수, 솎음처리가 생육과 병 발생에 미치는 영향
모황성,박홍우,장인배,유진,박기춘,현동윤,김기홍,서태철 한국약용작물학회 2015 한국약용작물학회지 Vol.23 No.3
This study was conducted to investigate the effects of sowing density, number of seeds sown per hole, and thinning treatment on growth characteristics and disease occurrence in Panax ginseng under direct sowing cultivation in a blue plastic greenhouse. Seedling were grown from 2 or 3 seeds sown, and the healthiest was only retained, while the rest were thinned out at the foliation stage. NO3-N, P2O5, and organic matter content differed significantly between growth conditions in the plastic greenhouse and in conventional shade in the soil. Disease also tended to be higher in the conventional shade than in the plastic greenhouse. Plant height and stem length showed an increasing trend with increasing sowing density and number of seeds sown per hole. However, these measures noticeably decreased when thinning treatment was conducted. Growth of the subterranean part of ginseng was not markedly influenced by sowing density, the number of seeds sown per hole, or thinning treatment. Root weight, which is an important factor in yield, was significantly affected by the number of seeds sown and thinning treatment. Interestingly, root weight tended to be higher in the thinning treatment plot than the untreated control plot. Damping-off and root rot increased noticeably as the number of seeds sown increased. Disease also tended to be substantially higher in the thinning treatment plot than the untreated control. However, physiological disorder of the plants did not vary with sowing density, the number of seeds sown, or thinning treatment.