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변시은,정상요,HNIN PHYU LWIN,이진희,Theint Thandar Latt,박효원,윤여은,이정수,이진욱 한국원예학회 2023 원예과학기술지 Vol.41 No.4
This study evaluated seasonal changes in various fruit quality attributes and the incidence of physiological disorders in the blocky and conical types of paprika cultivars using a simulated export system. The effects of three different pericarp colors were also investigated. ‘Scirocco’, ‘DSP 7054’, and ‘Volante’ cultivars were used as a blocky type, while ‘Raon red’, ‘Raon orange’, and ‘Raon yellow’ cultivars were used as a conical type with red, orange, and yellow pericarp color, respectively. The fruit was shipped at 10°C for two weeks, stored at 10°C for one week, and then transferred at 22°C for one week to simulate export by shipping. Storage temperatures and relative humidity levels greatly fluctuated in the winter season as compared to the summer season. Thus, fruit weight loss was higher in the winter season than in the summer season regardless of the cultivar type. However, the pericarp firmness was lower in the winter season. The soluble solids content and titratable acidity were higher in conical type than in the blocky type of paprika cultivar and highest in the ‘Raon red’ cultivar. The pericarp lightness and hue angle responded differently during the export season, depending on the pericarp color and fruit type. The incidence and severity of fruit shriveling were higher in the winter season than in the summer season, irrespective of the cultivar. Fruit shriveling was less severe in the conical type than in the blocky type, regardless of the pericarp color. Moreover, the incidence and severity of fruit softening, pedicel wilting, and pedicel browning were higher in the winter season than in the summer season. Therefore, the results indicate that the storage humidity levels likely play a pivotal role in the postharvest handling of paprika fruit quality during the seasonal export period. Thus, careful consideration of various techniques that are contingent upon the season of export and the specific type of fruit is required
변시은,Gon Ho Park,Jin Hee Lee,Hnin Phyu Lwin,Mukhamad Su’udi,김종기,이진욱 한국원예학회 2022 원예과학기술지 Vol.40 No.3
This study evaluates the combined effects of 1-methylcyclopropene (1-MCP) and modified atmosphere packaging (MAP) on the quality of cluster-type tomato cultivars. Here, we analyze the physiological and biochemical alterations that affect fruit characteristics during cold storage, including knuckle detachment force, ethylene production rate, and cell wall-degrading enzymatic activity. The optimum concentration of 1-MCP fumigation treatment to regulate fruit ripening after harvest was 1 μL·L-1. During storage at 10°C, the fruit of the ‘Amoroso’ cultivar performed better than those of the ‘Campari’ and ‘Aranca’ cultivars in terms of ethylene production, soluble solids content (SSC), and pericarp tissue firmness. The combination treatment with 1-MCP and MAP reduced the SSC level and retained the pericarp tissue firmness and knuckle detachment force in ‘Amoroso’ fruit in cold storage. Polypropylene (PP) MAP treatment alone did not affect the response to ethylene pro- duction during cold storage as significantly as the treatment with both 1-MCP and PP MAP. However, treatment with both 1-MCP and PP MAP retained the knuckle detachment force and delayed the alteration of O2 and CO2 composition, in contrast to PP MAP treatment alone. In addition, the enzymatic activities of polygalacturonase and cellulase remained unchanged when treated with 1-MCP and PP MAP. Therefore, combined application of 1-MCP and PP MAP is highly effective for retaining fruit quality of cluster-type tomato cultivars during cold storage.
변시은(Si?Eun Byeon),Alebel Mekuriaw Abebe,제갈윤혁(Yoon?Hyuk Jegal),Khin Pa Pa Wai,Muhammad Irfan Siddique,모황성(Hwang-Sung Mo),유희주(Hee Ju Yoo),장길수(Kil?Su Jang),황지은(Ji?Eun Hwang),전수경(Su?Gyeong Jeon),이수헌(Su-He 한국원예학회 2016 원예과학기술지 Vol.34 No.5
국내외에서 보고된 저항성 유전자원과 새로 찾은 자원을 포함한 고추 유전자원 총 33점에 세균성점무늬병원균(X. euvesicatoria)을 접종하여 과민반응형 저항성과 일반 저항성을 검정하고, 선발한 자원에 대하여 원예적 특성을 조사하였다. 국내에 보고된 4종의 race(1, 3, 7, 8)에 대한 과민반응형 저항성을 판별한 결과, Bs2 유전자를 보유한 KC00939와 Chilbok No.2는 예상대로 4종의 race에 과민형 반응을 나타내었다. Bs3 유전자를 보유한 Chilbok No.3는 예상대로 race 1과 7에 과민형 반응을 보였다. KC00939는 CMV와 BBWV의 복합 감염에 강한 저항성을 보이고 색소함량이 매우 높아 고색도 복합저항성 육종소재로서의 그 가치가 높았다. 이와 더불어 KC01327, KC01617, KC01015, KC01760, KC01779, KC01137, KC01328, KC01006, KC00127(PI369994), KC01704, KC00995, KC00131(PI369998) 및 KC01777이 높은 수준의 일반 저항성을 나타내었다. 이들 중 KC01617, KC01760, KC01779, KC01137, KC01704, KC01777은 이번 연구에서 세균성점무늬병 저항성으로 찾은 자원이다. 이들 세균성점무늬병 저항성 유전자원의 CMV와 BBWV의 복합 감염에 대한 저항성, 과실특성, 과실의 신미, 감미 및 색소함량(ASTA)을 분석한 결과는 세균성점무늬병 저항성 육종에 유용하게 활용될 것으로 기대된다. A total of 33 accessions of pepper (Capsicum spp.), including previously reported and newly discovered sources of resistance to bacterial spot caused by Xanthomonas euvesicatoria , were evaluated for their resistance to bacterial spot. The selected accessions were then grown and their horticultural characteristics were recorded. In a test for hypersensitive resistance (HR) to four races (P1, P3, P7, P8) of the pathogen found in Korea, KC00939 and Chilbok No.2, which carry the Bs2 gene, exhibited a hypersensitive response to all four races, as expected. Chilbok No.3, which carries the Bs3 gene, showed a hypersensitive reaction to race 1 and 7, as expected. KC00939 exhibited a high ASTA color value and tolerance to multiple infections from a viral complex of Cucumber mosaic virus (CMV) and Broad bean wilt virus (BBWV). Thus, this accession represents a promising genetic resource for breeding cultivars with multiple disease resistance and strong red coloration. KC01327, KC01617, KC01015, KC01760, KC01779, KC01137, KC01328, KC01006, KC00127, KC01704, and KC00995 did not exhibit hypersensitivity but showed a high level of general resistance when evaluated by spray inoculation. KC01617, KC01760, KC01779, KC01137, KC01704, and KC01777 are newly identified sources of resistance to bacterial spot. The previously and newly identified sources of resistance to bacterial spot evaluated in this study, including information about their resistance to CMV and BBWV complex in the field, the contents of pungent and sweet taste components, and the color values of dry fruits, will be useful for breeding pepper cultivars with resistance to bacterial spot.
Pathotypes of Bacterial Spot Pathogen Infecting Capsicum Peppers in Korea
Khin Pa Pa Wai,Muhammad Irfan Siddique,모황성,유희주,변시은,제갈윤혁,Alebel A. Mekuriaw,김병수 한국식물병리학회 2015 Plant Pathology Journal Vol.31 No.4
Sixty-seven isolates of bacterial spot pathogen (Xanthomonas spp.) collected from six provinces of Korea were tested for the identification of their pathotypes and determination of their distribution throughout Korea in an effort to genetically manage the disease. Near isogenic lines of Early Calwonder (Capsicum annuum) pepper plants carrying Bs1, Bs2 and Bs3, and PI235047 (C. pubescens) were used as differential hosts. Race P1 was found to be predominant, followed by race P7, and races P3 and P8 were also observed. This is the first report of races P7 and P8 in Korea. The races P7 and P8 were differentiated from the former races P1 and P3, respectively, on the basis of their ability to elicit hypersensitive reactions to PI235047.