Dose Effect of Phytosanitary Irradiation on the Postharvest Quality of Cut Flowers

권송(Song Kwon),권혜진(Hye Jin Kwon),류주현(Ju Hyun Ryu),김유리(Yu Ri Kim) 인간식물환경학회 2020 인간식물환경학회지 Vol.23 No.2

The present study was conducted to determine the effects of electron beam irradiation on the postharvest quality of cut flowers. Cut flowers were irradiated with electron beam at 100, 200, 400, 600, 800, 1,000, and 2,000 Gy with a 10 MeV linear electron beam accelerator to evaluate their irradiation tolerance. Postharvest quality was determined by monitoring fresh weight loss, flower longevity, flower diameter, flowering rate, visual quality of flowers and leaves, and chlorophyll content. Cut flowers showed a radiation-induced damage with increasing the irradiation dose. Flower longevity and fresh weight of cut flowers decreased when the irradiation dose was increased. Flower bud opening was also inhibited in a dose-dependent manner. The effective irradiation doses for 10% reduction of postharvest quality (ED10) values were 144.4, 451.6, and 841.2 Gy in the Medusa lily, ‘Montezuma’ carnation, and ‘Rosina White’ eustoma, respectively. Although tolerance of cut flowers to electron beam irradiation vary according to species, cultivars, or maturity stage conditions, it is conceivable that ‘Montezuma’ carnation and ‘Rosina White’ eustoma could be tolerated and maintained overall postharvest quality up to 400 Gy, the generic irradiation dose approved by the Animal and Plant Health Inspection Service (APHIS) and the International Plant Protection Convention (IPPC) for postharvest phytosanitary treatments.

전처리제 및 보존용액이 겹도라지의 절화수명에 미치는 영향

허윤선,이희두,이정관,이기열 한국화훼산업육성협회 2015 화훼연구 Vol.23 No.2

본 연구는 자색 겹꽃이 피어 관상가치가 높은 겹도라지(Platycodon grandiflorum var. duplex Makino)의 수확 후 절화 품질 향상을 위하여 몇가지 전처리제 및 보존용액이 겹도라지 절화 수명에 미치는 영향을 구명코자 하였다. 2년생 겹도라지를 2012년 6월 하순에서 7월 상순에 수확한 후 전처리제 및 보존용액 종류별로 처리하여 절화 특성을 조사하였다. 3% sucrose와 살균제인 200mg • L−1 Al2(SO4)3가 혼용 첨가된 전처리 용액에서 절화 수명 연장 및 개화율 향상 효과가 가장 컸고 생체중 및 용액흡수율도 크게 증가한 반면, 200mg • L−1 GA3 와 150mg • L−1 citric acid를 전처리제에 추가로 첨가하였을 때에는 전처리 효과의 차이는 크게 없는 것으로 조사되었다. 또한 보존용액으로 3% sucrose와 150mg • L−1 HQS을 혼용 처리하였을 때 절화 품질이 가장 양호하였으나, AgNO3이 추가로 첨가되었을 때에는 큰 차이가 없었다. NaOCl이 첨가된 용액에 전처리하였을 경우에는 보존용액의 종류와 상관없이 모든 처리구에서 절화 수명이 짧았고 개화율도 가장 낮게 조사되었는데, 본 실험에 사용된 NaOCl의 농도가 높아 약해가 발생하여 절화 품질이 떨어진 것으로 판단되었다. 따라서 겹도라지 절화의 상품가치를 최대로 높일 수 있는 전처리제 및 보존용액으로 각각 3% sucrose + 200mg • L−1 Al2(SO4)3 및 3% sucrose + 150mg • L−1 HQS 을 사용하였을 때 절화 수명은 최대 22일까지 연장되었고, 90% 이상의 개화율을 보였으며, 생체중 및 용액흡수율도 가장 증가되어 절화 품질을 향상시키는 데 효과적이었다. To improve postharvest flower quality and extend vase life of cut balloon flowers (Platycodon grandiflorum var. duplex Makino), the effects of pretreatment and holding solutions on vase life were investigated in this study. Balloon flowers which were cultivated for two years were harvested from end of June to beginning of July in 2012. After harvest, cut balloon flowers were treated with various pretreatment solutions including distilled water, sucrose, Al2(SO4)3, and NaOCl for 1 hour, and continuously put in the holding solutions including distilled water, sucrose, HQS, and AgNO3. The pretreatment solution containing 3% sucrose + 200 mg • L−1 Al2(SO4)3 significantly extended vase life and increased flowering rate, fresh weight and solution uptake, but when 200 mg • L−1 GA3 and 150 mg • L−1 citric acid were added, differences of flower quality were not observed Holding solution with 3% sucrose + 150 mg • L−1 HQS extended vase life and increased flowering rate, fresh weight and solution uptake. But addition of 25 mg • L−1 AgNO3 into holding solution with 3% sucrose + 150 mg • L−1 HQS showed little differences in flower quality. When 80 mg • L−1 NaOCl was pretreated, vase life was shortened and flowering rate decreased, irrespective of holding solution types. It was suggested that the high concentration of NaOCl induce the phytotoxic effect such as decline of vase life or fresh weight. From these results, we could find that the pretreatment solution containing 3% sucrose + 200 mg • L-1 Al2(SO4)3 and preservatives with 3% sucrose + 150 mg • L−1 HQS were very effective in extending vase life and retarding senescence of cut balloon flowers, furthermore, these postharvest treatments were very useful to improve the physiological properties of cut balloon flowers.

Morphogenesis, Flowering, and Gene Expression of <i>Dendranthema grandiflorum</i> in Response to Shift in Light Quality of Night Interruption

Park, Yoo Gyeong,Muneer, Sowbiya,Jeong, Byoung Ryong MDPI 2015 INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES Vol.16 No.7

<P>The impact of shifts in the spectral quality of light on morphogenesis, flowering, and photoperiodic gene expression during exposure to light quality of night interruption (NI) was investigated in <I>Dendranthema grandiflorum</I>. The circadian rhythms of plants grown in a closed walk-in growth chamber were interrupted at night for a total of 4 h, using light-emitting diodes with an intensity of 10 μmol·m<SUP>−2</SUP>·s<SUP>−1</SUP> PPF. The light quality of the NI was shifted from one wavelength to another after the first 2 h. Light treatments consisting of all possible pairings of blue (B), red (R), far-red (Fr), and white (W) light were tested. Plants in the NI treatment groups exposed to Fr light grew larger than plants in other treatment groups. Of plants in NI treatment groups, those in the NI-WB treatment grew the least. In addition, the impact of shifts in the light quality of NI on leaf expansion was greater in treatment groups exposed to a combination of either B and R or R and W light, regardless of their order of supply. Flowering was observed in the NI-RB, NI-FrR, NI-BFr, NI-FrB, NI-WB, NI-FrW, NI-WFr, NI-WR, and SD (short-day) treatments, and was especially promoted in the NI-BFr and NI-FrB treatments. In a combined shift treatment of B and R or B and W light, the NI concluded with B light (NI-RB and NI-WB) treatment induced flowering. The transcriptional factors <I>phyA</I>, <I>cry1</I> and <I>FTL</I> (<I>FLOWERING LOCUS T</I>) were positively affected, while <I>phyB</I> and <I>AFT</I> were negatively affected. In conclusion, morphogenesis, flowering, and transcriptional factors were all significantly affected either positively or negatively by shifts in the light quality of NI. The light quality of the first 2 h of NI affected neither morphogenesis nor flowering, while the light quality of the last 2 h of NI significantly affected both morphogenesis and flowering.</P>

전처리제 및 보존용액이 겹도라지의 절화수명에 미치는 영향

허윤선,이희두,이정관,이기열 한국화훼학회 2015 화훼연구 Vol.23 No.2

To improve postharvest flower quality and extend vase life of cut balloon flowers (Platycodon grandiflorum var. duplex Makino), the effects of pretreatment and holding solutions on vase life were investigated in this study. Balloon flowers which were cultivated for two years were harvested from end of June to beginning of July in 2012. After harvest, cut balloon flowers were treated with various pretreatment solutions including distilled water, sucrose, Al2(SO4)3, and NaOCl for 1 hour, and continuously put in the holding solutions including distilled water, sucrose, HQS, and AgNO3. The pretreatment solution containing 3% sucrose + 200 mg • L−1 Al2(SO4)3 significantly extended vase life and increased flowering rate, fresh weight and solution uptake, but when 200 mg • L−1 GA3 and 150 mg • L−1 citric acid were added, differences of flower quality were not observed Holding solution with 3% sucrose + 150 mg • L−1 HQS extended vase life and increased flowering rate, fresh weight and solution uptake. But addition of 25 mg • L−1 AgNO3 into holding solution with 3% sucrose + 150 mg • L−1 HQS showed little differences in flower quality. When 80 mg • L−1 NaOCl was pretreated, vase life was shortened and flowering rate decreased, irrespective of holding solution types. It was suggested that the high concentration of NaOCl induce the phytotoxic effect such as decline of vase life or fresh weight. From these results, we could find that the pretreatment solution containing 3% sucrose + 200 mg • L-1 Al2(SO4)3 and preservatives with 3% sucrose + 150 mg • L−1 HQS were very effective in extending vase life and retarding senescence of cut balloon flowers, furthermore, these postharvest treatments were very useful to improve the physiological properties of cut balloon flowers. 본 연구는 자색 겹꽃이 피어 관상가치가 높은 겹도라지(Platycodon grandiflorum var. duplex Makino)의 수확 후 절화 품질 향상을 위하여 몇가지 전처리제 및 보존용액이 겹도라지 절화 수명에 미치는 영향을 구명코자하였다. 2년생 겹도라지를 2012년 6월 하순에서 7월 상순에 수확한 후 전처리제 및 보존용액 종류별로 처리하여 절화 특성을 조사하였다. 3% sucrose와 살균제인 200mg • L−1 Al2(SO4)3가 혼용 첨가된 전처리 용액에서 절화 수명 연장 및 개화율 향상 효과가 가장 컸고 생체중및 용액흡수율도 크게 증가한 반면, 200mg • L−1 GA3 와150mg • L−1 citric acid를 전처리제에 추가로 첨가하였을때에는 전처리 효과의 차이는 크게 없는 것으로 조사되었다. 또한 보존용액으로 3% sucrose와 150mg • L−1 HQS을 혼용 처리하였을 때 절화 품질이 가장 양호하였으나, AgNO3이 추가로 첨가되었을 때에는 큰 차이가 없었다. NaOCl이 첨가된 용액에 전처리하였을 경우에는 보존용액의 종류와 상관없이 모든 처리구에서 절화 수명이짧았고 개화율도 가장 낮게 조사되었는데, 본 실험에 사용된 NaOCl의 농도가 높아 약해가 발생하여 절화 품질이 떨어진 것으로 판단되었다. 따라서 겹도라지 절화의상품가치를 최대로 높일 수 있는 전처리제 및 보존용액으로 각각 3% sucrose + 200mg • L−1 Al2(SO4)3 및 3% sucrose + 150mg • L−1 HQS 을 사용하였을 때 절화 수명은 최대 22일까지 연장되었고, 90% 이상의 개화율을 보였으며, 생체중 및 용액흡수율도 가장 증가되어 절화 품질을 향상시키는 데 효과적이었다.

나리의 상자재배시 재식밀도, 배지 및 양액농도가 생육에 미치는 영향

채수천 한국화훼산업육성협회 2008 화훼연구 Vol.16 No.1

나리의 상자재배시 재식밀도, 배지 및 양액농도가 생육에 미치는 영향에 대하여 조사 분석한 결과는 다 음과 같다. 재식밀도가 나리의 맹아에 미치는 영향은 14, 18 및 22구 처리가 1일 정도 맹아가 빨랐고, 개 화는 22구 처리에서 가장 빨랐고 6구 식재처리가 가 장 늦어 재식밀도가 높을수록 개화가 빠른 경향을 보 였다. 재식밀도가 높을수록 초장생장이 증가되어 절화 장이 길었으나 절화중, 화수 등 절화품질은 재식밀도가 낮을수록 증가하였다. 블라스팅이나 생리장해도 22, 18 및 14구순으로 재식밀도가 높을수록 발생율이 증가되 었다. 구고, 구폭, 구중, 인편수, 인편중 모두 22구 처 리를 제외한 모든 처리에서 정식전보다 우수한 결과를 나타냈으며 재식밀도가 높아질수록 구근비대가 좋지 않 았고 부패율도 증가하였다. 배지성분 변화는 구근 정식 전에 비해 pH는 모든 처리에서 낮아졌으며, 재식밀도 가 높을수록 더욱 낮아지는 경향을 나타내었다. P, K, Ca, Mg 성분은 정식 전에 비해 높아졌으나, K와 Ca 성분은 재식밀도가 높을수록 오히려 낮아지는 경향을 나타내었다. 절화품질은 왕겨+코이어(1:1, v/v)배지가 우수하였으나 다른 배지와 큰 차이는 없었다. 또한 절 화 후 구근 비대에서는 나리전용배지, 펄라이트+피트모 스(1:1, v/v)배지에서 우수한 결과를 보였으며, 부패율 은 왕겨+코이어(1:1, v/v)배지가 가장 높게 나타났다. 화뢰 출현기부터 절화기까지 양액농도별 처리에서 원시 1배액 처리가 절화장, 절화중, 화수 등 절화품질이 가장 좋았으며, 개화는 무처리, 원시 1/3배액 처리 순 으로 농도가 낮을수록 개화가 빨랐다. 절화 시 양액 농도별 엽분석 결과 처리농도가 높을수록 N와 K의 흡수율이 높게 나타났으며, Ca와 Mg도 농도가 높을수 록 증가추세를 보였으나 P는 모든 처리에서 흡수율이 가장 낮았다. This purpose of this study was to examine the effect of planting density, growing medium and strength of a nutrient solution (National Horticultural Research Institute's nutrient solution: HRI's) on the growth and development of Oriental hybrid lily ‘Le Reve’ in a box cultivation. The planting density with 14, 18 and 22 bulbs had sprouting one day earlier than other treatments. Planting density of 22 bulbs flowered first, while six bulbs flowered the last, indicating that higher planting densities led earlier flowering. The increasing planting density increased stem length of cut flowers. On the other hand, cut flower quality was improved when the planting density was lower. The incidence of physiological disorders such as blasting was more frequent in planting density of 22, 18, and 14, indicating that higher planting densities caused higher incidences of physiological disorders. All planting densities except 22 bulbs displayed superior results in width, weight, number, and scale weight of the bulbs. Greater planting densities led to inferior bulb enlargement and an increased decomposition rate. pH decreased in all treatments after the bulb enlargement and decreased more as the planting density increased. Contents of P, K, Ca, and Mg increased, while contents of K and Ca decreased, as the planting density increased. The rice hull+coir (1:1, v/v) treatment was better than others, but did not show that much of a difference. Moreover, in bulbs enlargement after cut flower harvest, lily medium and perlite+peat moss treatments showed superior results, and decomposition rate was the greatest in the rice hull+coir (1:1, v/v) treatment. In the HRI's solution strength treatment from the period of flower bud emergence to flower harvest, higher solution strengths gave better cut flower quality in terns of length, weight, and number of flowers. The non-treated control and one third strength of a HRI's solution hastened flowering, indicating that lower strengths led to earlier flowering. According to the results of leaf analysis as affected by solution strength during the flower harvest, absorption rates of N and K were greater when the strength was higher, and Ca and Mg showed the same tendency. On the other hand, the absorption rate of P was the lowest in all treatments.

Effect of GA3 and BA on Plant Growth of Ranunculus Cultivars

Ho-Geun Kwak,Young Ran Lee,Youn Jung Choi,Su Young Lee,Yun-Im Kang 한국화훼학회 2018 화훼연구 Vol.26 No.4

Ranunculus asiaticus characterizes colorful and attractive flower shapes that are related with the ornamental value of bulbous plants. Improving ornamental value of bulbous flowers has been the general goal of floricultural market. Gibberellic acid (GA3) and benzyladenine (BA) play an important role in growth and developmental processes in floriculture. Combinational treatments of these two hormones have been used in floriculture to improve flower quality. We assessed the effects of combined GA3 and BA, as well as the individual effects of each hormone, on growth characteristics using soil drench application to eight R. asiaticus cultivars, ‘Giallo Millepetali’, ‘Bianco Millepetali’, ‘Arancio Millepetali’, ‘Rosa SC’, ‘Arancio Pratolino’, ‘Giallo Pratolino’, ‘Bianco Pratolino’, and ‘Rosa Ch Pratolino’. GA3 treatments increased plant height and first flower size of R. asiaticus cultivars. Moreover, about 5 to 9 days to flowering were averagely shortened by GA3 treatments compared to controls. On the other hand, the opposites, including first flower size and days to flowering, were observed for cultivars treated with BA, compared with controls. Treatments of GA3 + BA generally affected growth traits, such as plant height, flower size, and the timing of flowering on some R. asiaticus cultivars. In particular, about 5 to 6 days to flowering were reduced on average by Treatments of GA3 + BA. Our results showed positive growth effects, including plant height, days to flowering, first flower height, number of flowers from the application of individual and combined hormones to R. asiaticus cultivars and demonstrate a role for these hormones in future bulbous floriculture.

Effect of Foliar Application of Gibberellic Acid and Machine Oil Emulsion Mixture on Flowering and Fruit Quality of Satsuma Mandarin (C. unshiu Marc. cv. Miyagawa) Cultivated on Open Fields

Kang, Seok-Beom,Moon, Young-Eel,Han, Seung-Gab,Choi, Young-Hun 한국토양비료학회 2014 한국토양비료학회지 Vol.47 No.6

In satsuma mandarin (C. unshiu Marc. cv. Miyagawa), alternate bearing is frequently occurred. It is very difficult to control and maintain the optimum production because satsuma mandarin is a very sensitive citrus cultivar. We carried out the experiment to find out the effects of foliar application of gibberellic acid ($GA_3$) and machine oil emulsion mixture on flowering and fruit quality of satsuma mandarin grown on open field. The treatments were composed of control (no application), $GA_3$ (25, 50 and $100mg{\cdot}L^{-1}$), machine oil emulsion 100 times and mixture of $GA_3$ (25 and $50mg{\cdot}L^{-1}$) with machine oil emulsion 100 times on 16 year-old 'Miyagawa' satsuma mandarin on December 30, 2012. Foliar application of $GA_3$ during winter season led to a reduction of the flowering in the following year. $GA_3$ decreased flowering in dose dependant manner. However, application of $GA_3$ and machine oil emulsion (100 times-diluted mixture) inhibited effectively the flowering compared to $GA_3$ only. Also, flower-leaf ratio was significantly decreased by the application of $GA_3$ 25 (0.54) and $50(0.41)mg{\cdot}L^{-1}$ with machine oil emulsion mixture in comparison to $GA_3$ 25 (0.86) and $50(0.60)mg{\cdot}L^{-1}$ only. The number of leaves per fruit increased in application of $GA_3$ and machine oil emulsion mixture as concentration of $GA_3$ increased. Fruit weight and sugar-acid ratio also increased in comparison to the control whereas fruit size, soluble solid content and acidity remained unchanged. From the results, it was suggested that $GA_3$ application can reduce the number of flowers on the alternate bearing of satsuma mandarin. Moreover, application of $GA_3$ (25 and $50mg{\cdot}L^{-1}$) with machine oil emulsion 100 times mixture can reduce the flowering effectively without altering fruit maturity and soluble solid contents. Therefore, it can be concluded that the application of $GA_3$ 25 and $50mg{\cdot}L^{-1}$ with machine oil emulsion 100 times might be useful in controlling alternate bearing in satsuma mandarin.

Effect of Foliar Application of Gibberellic Acid and Machine Oil Emulsion Mixture on Flowering and Fruit Quality of Satsuma Mandarin (C. unshiu Marc. cv. Miyagawa) Cultivated on Open Fields

Seok-Beom Kang,Young-Eel Moon,Seung-Gab Han,Young-Hun Choi 한국토양비료학회 2014 한국토양비료학회지 Vol.47 No.6

In satsuma mandarin (C. unshiu Marc. cv. Miyagawa), alternate bearing is frequently occurred. It is very difficult to control and maintain the optimum production because satsuma mandarin is a very sensitive citrus cultivar. We carried out the experiment to find out the effects of foliar application of gibberellic acid (GA₃) and machine oil emulsion mixture on flowering and fruit quality of satsuma mandarin grown on open field. The treatments were composed of control (no application), GA₃ (25, 50 and 100 mg?L<SUP>-1</SUP>), machine oil emulsion 100 times and mixture of GA₃ (25 and 50 mg?L<SUP>-1</SUP>) with machine oil emulsion 100 times on 16 year-old ‘Miyagawa’ satsuma mandarin on December 30, 2012. Foliar application of GA₃ during winter season led to a reduction of the flowering in the following year. GA₃ decreased flowering in dose dependant manner. However, application of GA₃ and machine oil emulsion (100 times-diluted mixture) inhibited effectively the flowering compared to GA₃ only. Also, flower-leaf ratio was significantly decreased by the application of GA₃3 25 (0.54) and 50 (0.41) mg?L<SUP>-1</SUP> with machine oil emulsion mixture in comparison to GA₃ 25 (0.86) and 50 (0.60) mg?L<SUP>-1</SUP> only. The number of leaves per fruit increased in application of GA₃ and machine oil emulsion mixture as concentration of GA₃ increased. Fruit weight and sugar-acid ratio also increased in comparison to the control whereas fruit size, soluble solid content and acidity remained unchanged. From the results, it was suggested that GA₃ application can reduce the number of flowers on the alternate bearing of satsuma mandarin. Moreover, application of GA₃ (25 and 50 mg?L<SUP>-1</SUP>) with machine oil emulsion 100 times mixture can reduce the flowering effectively without altering fruit maturity and soluble solid contents. Therefore, it can be concluded that the application of GA₃ 25 and 50 mg?L<SUP>-1</SUP> with machine oil emulsion 100 times might be useful in controlling alternate bearing in satsuma mandarin.

LED 광질이 칼랑코에의 생육과 개화에 미치는 영향

김소희 ( So Hee Kim ),허유 ( You Heo ),황령환 ( Ryeong Hwan Hwang ),박영훈 ( Young Hoon Park ),최영환 ( Young Whan Choi ),서정민 ( Jeong Min Suh ),강점순 ( Jum Soon Kang ) 한국환경과학회 2014 한국환경과학회지 Vol.23 No.9

This study was conducted to examine the effect of LED light quality and supplemental LED light on growth and flowering for potted flowering plant of Kalanchoe. 1. Plant height of Kalanchoe was enhanced under Red, regardless of treatment time. 2. Root length and stem diameter of Kalanchoe were enhanced by Red+Blue. 3. The number of internodes was not influenced by LED light quality. Length of flower stalk of Kalanchoe increased under Red+Blue, but treatment time did not result in statistically significant differences. 4. Leaf area was not influenced by LED light quality in Kalanchoe. 5. The number of flower buds and open flowers was decreased by LED light treatment, but days to flowering was reduced by Red+Blue for 4 hr after sunset in Kalanchoe. 6. Chlorophyll and anthocyanin content was not significantly affected by LED light treatment, but anthocyanin content tended to increase by Blue 4 hr after sunset. 7. Fresh and dry weight did not increased by LED light treatment in Kalanchoe.

O2O 꽃배달 플랫폼 품질이 지각된 가치와 신뢰, 만족과 지속의도에 미치는 영향

정나연,이준엽 한국이벤트컨벤션학회 2022 이벤트 컨벤션 연구 Vol.18 No.4

Purpose – The purpose of this study was to identify the rapidly increasing quality and usage behavior of the O2O flower delivery platform due to technological development and COVID-19, identify the perceived value and trust, identify the structural relationship between the factors, and provide basic data for successful operation of flower-related companies. Design, data, and methodology –The survey was conducted on online and SNS using Google Docs for about 15 days from October 15 to October 30, 2021 to those who have experienced O2O flower delivery platform. Result – As a result of verifying a total of 6 hypotheses and the lower 19 hypotheses, a statistically significant influence relationship was found in all hypothesis paths except for the 4 lower hypotheses. Conclusions – O2O flower delivery platform quality was found to be an important variable that had a positive effect on perceived value and trust, and O2O flower delivery platform quality was found to have an effect on satisfaction and continuous use behavior through perceived value and trust.