• 원예과학기술지
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• 제29권1호
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• pp.43-47
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• 2011

This study was conducted to determine the effects of silver thiosulfate (STS) and 1-methylcyclopropene (1-MCP) on flower opening and lifespan of potted Kalanchoe blossfeldiana 'Oriba' for exportation. Ethylene inhibitors, STS and 1-MCP were applied to the kalanchoe plants prior to their export to Japan. STS 0.5 mM with 1% Tween 20 surfactant was directly sprayed (20 mL per plant) to leaves, buds, and flowers and 1-MCP 100 $nL{\cdot}L^{-1}$ was injected into sealed glass chambers containing kalanchoe plants, which were placed on the chambers for 6 hours. After transport to Japan, the plants were immediately transferred to a simulated retail condition room (80 ${\mu}mol{\cdot}m^{-2}{\cdot}s^{-1}$ for 12 hours of photoperiod at $22^{\circ}C$ and 64% RH) at Toyko University. The numbers of buds, open florets, and wilted florets in the middle inflorescence for each plant were counted right after export, 1 week after export, and 6 weeks after export. The percentages of open florets and wilted florets were calculated from the numbers. STS treatment resulted in 35% more open florets than the control and only 11% of wilted florets at 6 weeks after export to Japan which indicate the extension of lifespan of potted kalanchoe plants. Meanwhile, the plants exposed to 1-MCP before export did not show any significant differences in the numbers of buds and open florets and the percentages of open and wilted florets compared to control plants. In conclusion, STS 0.5 mM treatment strikingly induced better opening florets and lifespan of kalanchoe plants from 1 week to 6 weeks after export than control.

• Current Research on Agriculture and Life Sciences
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• 제17권
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• pp.71-77
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• 1999

나리속(屬) 식물의 촉성재배에 있어 계통 및 품종별 차광정도와 기간에 따른 생육반응을 조사하였다. 초장은 초기차광에 의해 차광율이 높아짐에 따라 'Gelria'와 ' Casablanca'는 초장이 길어진 반면 'Jolanda'와 'Land'는 오히려 짧아지는 경향이었다. 또한 연속차광에 의해 'Gelria'를 제외한 3품종은 차광율이 높아짐에 따라 초장이 길어졌으나 'Gelria'의 초장은 대조구에 비해 차광구에서 초장이 짧았다. 개화는 생육초기에 차광함으로써 'Gelria'의 경우 차광율이 높아질수록 blasting의 발생이 많아지고 개화소요일수(開花所要日數)가 단축되었으나 암처리에 의해 다시 개화소요일수(開花所要日數)가 길어졌다. 다른 품종들은 큰 차이를 보이지 않았으나 암처리구에서 'Jolanda'의 경우 blasting이 15.7% 발생하였고 'Dream land'와 'Casablanca'는 착화수(着花數)가 감소되었다. 연속 차광함으로써 'Gelria'의 경우 차광정도에 관계없이 차광에 의해 화아(花芽)가 형성되지 않았고 'Jolanda'는 75%차광구, 'Dream Land'는 50%차광구부터 각각 화수(花數)가 줄어들었으며 꽃크기도 작아졌고 'Dream Land'는 75% 차광하에서 화아(花芽)가 형성되지 않았다. 그러나 'Casablanca'는 차광구에서 단지 개화소요일수(開花所要日數)만 길어졌다. 신구(新球)의 비대(肥大)는 생육초기 차광구에서 단지 'Casablanca' 품종만 차광에 의해 신구(新球)의 비대(肥大)가 저조하였고 다른 품종들은 차이가 없었다. 그러나 연속차광에 의해서는 공시품종 모두 차광에 의해 신구(新球)의 비대(肥大)가 저조했다.

• 생물환경조절학회지
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• 제30권4호
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• pp.320-327
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• 2021

최근 지구온난화에 의한 이상기상으로 겨울철 한파와 봄철 저온에 의한 농작물 피해가 심각하게 발생하고 있다. 특히 과수의 개화기 저온피해는 꽃눈의 생육단계에 따라 차이가 있으며 발육이 진전될수록 내한성이 약해져 개화 직전부터 낙화 후 1주까지 한계온도가 다르게 발생한다. 따라서 개화기가 빠른 사과 '홍로'가 '후지'보다 피해가 심각한 것이 일반적이나 2020년 4월 저온피해는 개화기가 늦은 '후지'의 피해가 심하게 발생하여그 원인을 분석하고자 본 연구를 수행하였다. 충북 보은군 사과나무 '후지'와 '홍로'를 동시에 재배하는 2농가를 대상으로 품종 간 피해율 실태조사를 실시하였다. 또한 정확한 품종 간 비교 분석을 위하여 생육단계가 동일한 시료를 선택하여 인위적으로 저온처리(-2.0℃, -4.0℃)를 하여 피해 정도를 조사하고, 원인 분석을 위해 조직 내 유리당과 호르몬 함량을 분석하였다. 실태조사 결과 2농가 모두 '후지'가 '홍로'보다 피해율이 높았으며, 특히 B농가(저지대, 평지) '후지'의 경우 피해율이 60.5%로 가장 높았다. 또한 동일한 생육단계의 시료를 사용한 인위적 저온 처리 시험결과에서도 '후지'와 '홍로' 품종 간 피해율에 유의한 차이가 있었다. 유리당 함량은 저온 피해율이 낮았던 '홍로'가'후지'보다 높았으며, 호르몬 분석 결과 정상 꽃눈보다 손상된 조직에서 ABA, IAA와 SA 함량이 높게 나타났다. 따라서 본 연구 결과 조직내 유리당 함량이 높으면 저온 피해율이 낮은 것을 확인할 수 있었으며, 특히 저온 피해율은 sorbitol 함량과 부의 상관관계를 이루고 있다.

• 농촌계획
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• 제23권3호
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• pp.53-60
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• 2017

In order to export Korean spray roses to the China, it is needed to analyse chinese preferences, rose attributes, and purchase intentions. The purpose of this study is to present the implications on the production and distribution of roses for export by analyzing the quality preference attributes and purchase intention of Korean rose for Chinese flower experts. A survey on the preference and purchase intention of Korean flower roses by Chinese flower experts was conducted through face - to - face interviews with flower show participants in China. Approximately 100 Chinese flower experts who participated in the Flower Show in 2016 received the questionnaire, and 86 survey results could be used for analysis. Survey data were analyzed using ordered probit and bivariate probit models. As a result of an analysis, it was found that Chinese flower experts were more likely to buy Korean roses than Chinese roses even if they consider flower color, leaf shape and size and color diversity. The probability of purchasing more than twice the price was higher than that of the color diversity considering the flower shape, leaf shape and size, but the bivariate order probit model was larger than that of flowers, leaves and size, and the order of probability size was changed. In order to increase the export of Korean spray roses to the Chinese market, We need to increase Chinese experts' preferences and satisfaction. For this purpose, it is very important to develop export varieties of roses with large flower buds and shape / coloring, and to apply the useful post-harvest technology that can extend freshness and distribution period of export roses.

• 식물조직배양학회지
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• 제25권4호
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• pp.263-266
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• 1998

파(Allium fistulosum L.)의 자방을 0.5mg/L NAA와 0.5mg/L BA 또는 0.5mg/L kinetin을 조합처리한 MS배지에서 배양하였을 때, 자방의 표면으로부터 화아발생 캘러스가 유도되었다. 화아발생 캘러스의 유지는 0.5mg/L NAA와 0.5mg/L kinetin이 첨가된 배지에서 계대배양 하였을 때 양호하였다. 배양 3-4주 후 화아들은 화아발생 캘러스로부터 형성되었지만, 계대배양을 거듭할수록 화아의 발생률이 감소하였다. 화아의 발생 단계별 조직학적 관찰 결과 돔형의 분열조직이 넓게 퍼지면서 자연상태의 꽃과 같이 외측에 화판, 내측에 심피와 배주가 기원된 후 성숙한 꽃으로 발달하였다.

• 한국의류학회지
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• 제47권2호
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• pp.392-408
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• 2023

This study concerns the flower-shaped silver crown ornament and inverted triangle-shaped crown ornament of Baekje, which were worn frequently during the Sabi period. The purpose of this study is to present a new estimated shape of the crown and ornaments. Individual excavation cases and archaeological data were analyzed. The flower-shaped silver crown ornament appears as a thin silver plate with buds on the center and side branches and is symmetrically bent from the center to form a ∧ shape. The inverted triangle-shaped crown ornament resembles two right-angle triangles that are back-to-back. The crown to which the two ornaments were added appears to be a triangular crown that was made by covering birch bark of with fabric. Both ornaments were believed to have been located on the front of crown, but that is incorrect. The flower-shaped silver crown ornament was inserted on the front of the crown, and the inverted triangle-shaped crown ornament was fixed with a tip at the top of the crown and then obliquely on the crown's side. The inferred design was confirmed with real reproductions. This study is significant in that it identifies the crown of Baekje during the Sabi period.

• 원예과학기술지
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• 제29권5호
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• pp.494-499
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• 2011

Cold pretreatment, washing medium and composition of nutrient media may have marked effects on microspore embryogenesis. When microspores isolated from radish (Raphanus sativus L. cv. Gwanhun) flower buds were washed with Nitsch & Nitsch (NLN) medium liquid medium containing $130g{\cdot}L^{-1}$ sucrose (NLN-13), yields of microspore-derived embryos were greater than when using B5 liquid medium containing $130g{\cdot}L^{-1}$ sucrose. Microspore viability is known to decrease rapidly with storage; however, in this experiment, microspore viability was maintained for 24 h at $4^{\circ}C$ without media. Among the various medium concentrations used ($0.25{\times}$, $0.5{\times}$, $1.0{\times}$, $2.0{\times}$, and $4.0{\times}$ NLN liquid medium), $0.5{\times}$ NLN liquid medium induced the most efficient formation of microspore-derived embryos. In addition, microspore-derived embryos yields were greater when microspores were cultured in $0.5{\times}$ NLN liquid medium supplemented with $0.25{\times}$, $0.5{\times}$, and $1.0{\times}$ NLN microelements, compared to medium not supplemented with microelements. In this study, the highest yield of microspore-derived embryos was observed when the microspores derived from flower buds were washed using NLN-13 liquid medium and then cultured on $0.5{\times}$ NLN liquid medium supplemented with $0.25{\times}$ NLN microelements, followed by incubation at $25^{\circ}C$ for 30 days.

• 동의생리병리학회지
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• 제31권3호
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• pp.188-193
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• 2017

This study investigated the antioxidant activities of distilled water, ethanol and methanol extracts of Plunus mume flower buds (PFB). The various solvent extracts of PFB were evaluated for their total polyphenol, flavonoid, reducing power and free radical scavenging activities by FRAP and DPPH analysis. The ethanol extract of PFB contained significantly higher amounts of total polyphenols (145 mg GAE/g) and flavonoids (25.43 mg QE/g) than methanol (132 and 25.42) and distilled water (113.6 and 18.04). Among solvent extracts of PFB, the ethanol extract showed the highest antioxidant activities. The 100% ethanol extract of PFB contained significantly higher amounts of total polyphenols and flavonoids than 70% and 50% ethanol extracts. Moreover, the 100% ethanol extract of PFB showed high efficacy in DPPH radical scavenging activity and in collagenase inhibition activity. This results suggest that 100% ethanol extract of PFB has the most effective antioxidant capacity compared to the methanol and water extracts tested in the present study. Thus, it can be applied for the effective extraction of functional material from PFB for usage of cosmeceutical and/or food industries.

• 한국산림과학회지
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• 제47권1호
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• pp.16-26
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• 1980

슬래쉬 소나무의 화아원기(花芽原基) 형성(形成) 기간(期間) 중(中)에 정아(頂芽)의 영양(營養) 상태(狀態)를 구명(究明)하기 위하여, 정아(頂芽)의 탄수화물(炭水化物)과 아미노산의 함량을 조사(調査)하였다. 접목(接木)으로 조성된, 18년생(年生) 슬래쉬 소나무를 개화량(開花量)의 다소(多少)에 따라 다수개화(多數開花) 그룹과 소수개화(少數開花) 그룹으로 나누고, 각 그룹에서 각각 두 개(二個)씩의 정아형(頂芽型)을 선택하였다. 즉 (1) 다수개화(多數開花) 그룹에서 수관상부(樹冠上部)에 있는 대아(大芽) (자화생산(雌花生産))와 하부(下部)에 있는 소아(小芽) (웅화생산(雄花生産)), (2) 소수(少數) 개화(開花) 그룹에서 수관상부(樹冠上部)에 있는 대아(大芽) (영양아(營養芽))와 하부(下部)에 있는 소아(小芽)(웅화생산(雄花生産))의 도합 4가지였다. 7월(月) 하순부터 9월(月)상순 사이에, 정아(頂芽)를 4회(回) 채취하여 75% 에칠알콜로 추출하고, 탄수화물(炭水化物)은 가스크로마토그래피로, 아미노산은 자동분석기(自動分析器)로 분석(分析)하였다. 두 그룹의 대아(大芽)는 각각 같은 그룹의 소아(小芽)보다 당(糖)의 함량(含量)이 많았으며, 4그룹에서 공(共)히 fructose와 glucose가 주성분(主成分)을 이루고 있었다. 아미노산 중(中)에서는 arginine의 함량(含量)이 가장 많았으며, 4그룹의 평균치(平均値)로 볼 때 7월(月)에 23%에서 9월(月)에 60%로 증가(增加)하였다. 웅화(雄花)를 생산(生産)하는 정아(頂芽)의 arginine과 총(總) 아미노산의 함량은 다른 세그룹의 함량(含量)보다 훨씬 적었다. 다수개화(多數開花) 그룹내의 두 정아형(頂芽型)을 비교할 때, 자화(雌花)눈의 arginine 양(量)은 7월(月)에 웅화(雄花)눈과 거의 같았으나, 9월(月)에는 자화(雌花)눈이 웅화(雄花)눈보다 사배(四倍)의 arginine을 함유(含有)하고 있었다. 이로 미루어 보아, arginine은 자화(雌花)의 원기형성(原基形成)에 직접 관여하지 않는 것으로 사료된다. 자화(雌花)를 생산(生産)하는 정아(頂芽)는 낮은 아미노산의 함량(含量)으로 인(因)하여, 탄수화물(炭水化物)과 아마노산의 비율(比率)(C/N율(率))이 원기형성(原基形成) 기간(其間) 동안에 아주 높은 것으로 나타났으며, 이는 자화(雌花)의 원기형성(原基形成)은 일시적(一時的)인 신진대사(新陣代謝) 활동(活動)의 감소(減少)를 동반(同伴)하는 것 같다.

• 한국환경농학회지
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• 제40권2호
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• pp.73-82
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• 2021

BACKGROUND: The successful management of jujube trees depends on maintaining a balance between reproductive and vegetative growth. In general, heading cuts of trunk stimulate rather vegetative growth, but could decrease flower initiation. This study was conducted to establish a heading-back pruning severities at planting in the one year old 'Daeneung' jujube whip nursery tree by investigating vegetative growth and fruit yield. METHODS AND RESULTS: The heading back pruning severity was assigned as 5 different ranges as follow: one bud (TR-10, heading back pruning was 10 cm above the ground), three buds (TR-30), five buds (TR-50), seven buds (TR-70), and nine buds (TR-90) were left of scion. The number of buds on whip trunk was correlated to the central leader length and increment of trunk cross-sectional area, negatively, and to the tree height and canopy volume, positively. The yields in the TR-50 treatment were higher about 2 times than other treatments. The fruit diameter was not significantly different among the treatments. CONCLUSION: These results indicated that the optimum location of heading-back pruning in one year old 'Daeneung' jujube tree was 50 cm above the ground as evaluated by the balance of reproductive and vegetative growth.