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부유 단감의 연화방지를 위한 1-Methylcyclopropene의 실용적 처리방법
안광환(Gwang Hwan Ahn),최성진(Seong-Jin Choi) 한국원예학회 2010 원예과학기술지 Vol.28 No.2
1-Methylcyclopropene (1-MCP), the gaseous ethylene action inhibitor, is an effective compound for delaying post-storage flesh softening of ‘Fuyu’ persimmon fruits. Conventionally, 1-MCP is treated on fruits in storage room by dissolving SmartFreshTR powder, the 1-MCP generating agent, in water. In this study, the practical methods were positively worked out when a small portion or a dilute of SmartFresh, either stuck on adhesive tape or premixed with silica powder, was enclosed directly into a modified atmosphere (MA) packaged fruit box. The 1-MCP gas was generated from the SmartFresh by absorbing moisture from atmosphere of the package. Treatments by these methods delayed the post-storage softening of ‘Fuyu’ persimmon as effectively as the conventional method.
조 · 만생종 완전단감의 과실발달 단계별 형질특성 및 유전자 발현 분석
김은경(Eun-Gyeong Kim),안광환(Gwang-Hwan Ahn),박기림(Girim Park),손병구(Beunggu Son),최영환(Youngwhan Choi),강점순(Jumsoon Kang),이용재(Youngjae Lee),제병일(Byeong Il Je),박영훈(Younghoon Park) 한국원예학회 2021 원예과학기술지 Vol.39 No.3
We analyzed the major fruit traits and transcriptomes between a late-ripening cultivar ‘Fuyu’ and an early-ripening cultivar ‘Soshu’ of pollination constant non-astringent persimmon (Diospyros kaki Thunb.) at different developmental stages. Sugar concentration and fruit peel color were measured every 3 weeks, until 18 weeks after full bloom (WAB) for ‘Soshu’ and 24 WAB for ‘Fuyu’. For the sugar concentration in fruit, sucrose levels began to decline 9 weeks earlier in ‘Soshu’. Fruit peel coloring progressed faster in ‘Soshu’, and differences in color between the cultivars were most notable at 18 WAB. Transcriptome analysis was carried out for fruit flesh every 3 weeks from 9-18 WAB. Gene ontology term analysis of the transcriptome indicated that catalytic and transport genes involved in metabolism and growth in cells and cellular organelles were mainly expressed, while in KOG and KEGG analysis, the majority of expressed genes were related to signal transduction, nuclear structure, and starch and sucrose metabolism. Differentially expressed genes were analyzed from two sets of samples: set I, in which fruits sampled at 12, 15, and 18 WAB were compared as the treatment group to the sample collected at 9 WAB as the control for each cultivar; and set II, in which fruit samples of ‘Soshu’ were compared as the treatment group to ‘Fuyu’ as the control at each WAB. For the DEGs of set I, containing three comparison combinations, the number of up-regulated genes in the treatment sample was highest at 18 WAB in ‘Fuyu’ and at 15 WAB in ‘Soshu’. For the DEGs of set II, the number of down-regulated genes and the number of up-regulated genes were higher in ‘Soshu’ compared to ‘Fuyu’ at 12 WAB and 15 WAB, respectively. We then compared the expression patterns of fruit trait-related genes with the phenotypic changes in traits. Our results indicated that UGPase-1 and AGPase-1, involved in carbohydrate metabolism, and CRTISO and PDS, involved in carotenoid biosynthesis, may induce early fruit ripening in ‘Soshu’. In addition, the transcription factors (TFs) ERF3, which binds to the promoter of ethylene-responsive genes; the MADS-box TFs RIN, AGL, and FUL; and the NAC TF controlling climacteric-type fruit ripening were considered to play a key role in controlling fruit ripening in ‘Fuyu’ and ‘Soshu’.
손지영(Ji-Young Son),안광환(Gwang-Hwan Ahn),김은경(Eun-Gyeong Kim),최성태(Seong-Tae Choi),이동욱(Dong-Uk Lee),박혜원(Hye-Won Park),이승철(Seung-Cheol Lee) 한국식품과학회 2020 한국식품과학회지 Vol.52 No.4
단감연구소에서 출하 시기 조절을 위해 육성된 중생종 단감 신품종 홍추와 기존 재배품종 상서조생, 서촌조생, 부유 3품종의 잎 추출물을 제조하여 생리활성을 비교하였다. 그 결과, 홍추의 잎 추출물의 총페놀 함량, Vit. C 함량, DPPH 및 ABTS 라디칼 소거능, ADH 활성에 미치는 영향이 다른 추출물에 비하여 유의하게 높다는 결과를 얻을 수 있었다. ADH 활성도는 부유의 잎 추출물에서 다른 품종에 비해 비교적 높게 나타났다. 이상의 결과는 신품종 단감 홍추의 잎을 이용한 고품질 감잎차의 제조가 가능함을 시사한다. This study was conducted to evaluate several physiological activities of 4 sweet persimmon cultivar leaf water extracts. One new cultivar (‘Hongchu’ (HC)]) and three traditional cultivars (‘Sangseojosaeng’ (UW), Japanese Uenishiwase; ‘Seochonjosaeng’ (NW), Japanese Nishimurawase; and ‘Buyu’ (FY), Japanese Fuyu) were used in this study. The HC extract showed significantly higher DPPH and ABTS radical scavenging activities, tyrosinase inhibitory activity, and acetaldehyde dehydrogenase activity than the other extracts, while the FY extract exhibited a relatively higher alcohol dehydrogenase activity. The HC extract contained higher amount of phenolics and ascorbic acid. These results suggest the possibility of high-quality persimmon leaf tea development using the new sweet persimmon cultivar, HC.
농식품 환경 분야(PF) : PF-03 ; 무농약 재배 단감과원의 과실봉지 씌우기에 따른 해충 피해 정도 및 과실 특성
최성태 ( Seong Tae Choi ),안광환 ( Gwang Hwan Ahn ),황연현 ( Yeon Hyeon Hwang ),김은석 ( Eun Seok Kim ) 한국환경농학회 2014 한국환경농학회 학술대회집 Vol.2014 No.-
무농약 또는 유기재배 단감과원에서 사용할 수 있는 친환경 살충제는 그 종류가 적고 방제효과도 낮은 편이기 때문에 친환경적인 해충 방제법 개발이 시급하다. 다른 과수의 경우 과실봉지를 해충방제 및 품질 향상에 활용하고 있지만, 우리나라 단감에 검토한 바는 아직 없다. 본 연구에서는 무방제 및 친환경 방제(석회유황합제 및 기계유유제 혼합 살포) 포장의 ‘부유’ 단감에 복숭아용과실봉지를 7월 상순에 씌워 수확 때까지 소요되는 비용, 해충 피해 정도 및 과실 특성을 조사하였다. 봉지 구입, 씌우기 및 벗기기에 소요된 비용은 과실 100개당 8,820원이었다. 무방제구의 해충 피해율은 노린재류 1.7%, 깍지벌레류 9.2%, 잎말이나방류 3.3%였는데, 봉지를 씌웠을 때는 노린재류와 잎말이나방류 피해가 없었고 깍지벌레류는 1.7%로 낮았다. 친환경 방제구의 경우 깍지벌레류 피해는 발견되지 않았고 노린재류 및 잎말이나방류 피해율이 각각 1.7%였는데, 봉지를 씌웠을 때는 모두 0.8%로 감소하였다. 친환경 방제구에서 조사한 과실의 크기, 경도, 당도는 봉지 씌우기의 영향이 없었으나 적색도는 봉지를 씌운 과실에서 유의적으로 높았다. 따라서 친환경 재배 시과실봉지를 씌울 경우 비용이 들지만 과실 품질에 지장 없이 효과적인 해충 방제가 가능할 것으로 판단된다.