• Korean journal of applied entomology
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• v.8
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• pp.11-18
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• 1969

식물 생장 조절제로서 phthalamic acid와 그 유도체를 사용하여 추락답을 개량하기 위한 예비 시험을 실시하여 다음과 같을 결과를 얻었다. 1) 아래 7종의 phthalamic acid 및 그 유도체를 합성 또는 정제하여 공시약제로 하였으며 합성품의 수율은 $87-92\%$였다. (표 1) A. Phthalamic acid B. Phthalanilic acid C. N- (o-Chlorophenly)-phthalamic acid D. N-(p-Chlorophenyl)-phthalamic acid E. N- (3,4-Dichlorophenyl)-phthalamic acid F. Sodium-N- (m-tolyl)-phthalamate (Duraset) G. Sodium-N-(1-naphthyl)-phthalamate (Alanap) 2) Wheat straight growth test에서 공시약제는 10ppm 및 20ppm의 농도에서 Control보다 월등한 생장 촉진효과를 보였으며 특히 흥미있는 것은 phthalamic acid 유도체가 phthalamic acid 자체보다 더 좋은 효과를 보였다. (표4, 그림 1) 3) 수도 종자의 발아 시험 결과 초장은 phthalamic acid 유도체가 적시 phthalamic acid 자체보다 좋았으며 기중 Alanap. 3,4-dichlorophenyl phthalamic acid 및 Duraset가 가장 좋았으나 10-100ppm 범위내의 농도에 거의 영향없었다. (표 5) 근의 생육은 일반적으로 약제의 종류에 따라 상이할 뿐 아니라 초장의 생육보다 더욱 약제에 민감하였다. 근장은 phthalamic acid, phthalanilic acid, (p-chlorophenyl)phthalamic acid, 3,4-dichlorophenyl phthalamic acid가 Control 보다 약간 좋은 효과를 보였고, Alanap은 매우 불량하였다. (표 6) 근수는 (p-chlorohhenyl) phthalamic acid만 Control에 비해 우수하였고 나머지 약제는 대체로 근수를 감소시키거나 Control과 비슷한 효과를 보였다. (표 7) 또한 농도가 증가함에 따라 근수는 감소하였으며, Alanap, (o-chlorophenyl) phthalamic acid는 근단에 심한 약해가 일어났다. 4) 전근시험에서 근수는 공시약제에 의하여 증가되었으나 50-200ppm의 농도에서 별 영향이 없었다.(표 8, 그림 2) 근장은 농도가 증가함에 따라 감소되는 영향이었으나 공시약제에는 상이한 효과를 보였다. 5) 이상 결과에서 p-chlorophenyl phthalamic acid 및 3,4-dichlorophenyl phthalamic acid가 수도용 식물생장조절제로서 실용적 개발의 가능성을 보였다.

• KOREAN JOURNAL OF CROP SCIENCE
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• v.42 no.6
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• pp.678-686
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• 1997

This experiment was carried out to develop the mass propagation system for producing plug plantlets using stem cuttings of virus-tree microtubers in potato. Cocopeat, vermiculite, perlite and peatmoss were combined and used as plug nursery media to find out the best combination suitable for the growth of seedlings derived from microtubers. Seedling growth was favored in high temperature (above 2$0^{\circ}C$) and a long-day photoperiod(above 16 hours) condition, while stolons and microtubers formed in outdoor condition. Shoot and root multiplication was not affected by NAA 10mg /1 or IAA 10mg /1 treatment. At the early growth stage of plug plantlets, the number of leaves and roots and the length of root increased significantly when nodes from the upper (near to apex) part of shoots rather than from basal part were taken. But after transplanting, these differences among these characters were not observed. At ninety days after transplanting the plug plantlets in spring time, plant was around 70 to 80cm in height, and the number of stolons and tubers were ten and seven, respectively.

• Journal of Bio-Environment Control
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• v.4 no.2
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• pp.240-245
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• 1995

In order to find out the effect of temperature and shading on the growth and major disease infection of Eutrema wasabi Matsum., experiments were at growth chamber condition and field. Plant height, petiole and rhizome of wasabi were obvious decreased with increase the temperature, from which the optimum air temperature for the plant growth were estimated to be 17$^{\circ}C$. The light intensity of the treatment with 75% shading net was favorable to the length of main rhizome, rhizome weight and whole plant weight. Infection ratio of black leg and soft rot were increased at high temperature condition, however their infection ratio were decreased with increase the shading condition.

• Korean Journal of Plant Resources
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• v.17 no.2
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• pp.153-160
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• 2004

Glehnia littoralis is known as an edible and medicinal plant using green loaves and mature roots of plant. In the present paper, the influence of plant growth regulators on callus induction and plant regeneration was investigated. Callus induction and regeneration occurred from leaf and petiole explants in Glehnia littoralis. Optimal condition of plant growth regulators for callus induction from leaf and petiole explants was MS basal medium supplemented with 2mg/L 2,4-D and 2mg/L BA. The frequency of callus induction was higher in petiole explant than leaf. When the callus was cultured on MS basal medium supplemented with 0∼1 mg/L IAA, 0∼1mg/L NAA and 0∼2mg/L BA for about 65 days, the most effective plant growth regulators on plant regeneration from callus were 1mg/L NAA and 2mg/L BA. The plantlets acclimatized successfully and grown in vermiculite matrix.

• Proceedings of the Plant Resources Society of Korea Conference
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• 2020.12a
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• pp.56-56
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• 2020

감초는 다년생 콩과(Leguminocae) 식물로 국내에서 시중가격이 높은 만주감초가 일부 재배되고 있다. 우리나라에서 감초 재배법이 불완전한 상황에서 한반도의 기후변화에 의한 온도 상승은 약용작물의 생산 및 품질에 많은 영향을 미칠 것으로 예상되므로 본 연구에서는 재배환경 중 온도 조건만 조절할 수 있는 온도구배터널(temperature gradient tunnel system)을 이용하여 4개의 T1(외기온도+0.5~1.3℃), T2(+1.3~2.2℃), T3(+2.2~3.2℃), T4(+3.2~4.0℃) 처리로 온도구배 하여 4년생 만주감초(Glycyrrhiza uralensis F.)를 재배하였다. 지하부가 오래된 모주와 신초1의 경우 저온(T1)과 중간구간(T2, T3)에서 초장과 총화수가 우세하였고, 번식이 가장 늦은 신초2의 경우 중간구간(T2, T3)에서의 생육 및 개화반응이 뚜렷했다. 각 온도처리구마다 3개의 감초 개체를 선발하여 모주의 정단으로부터 5개의 성엽을 채취하였다. Reverse transcription quantitative PCR (RT-qPCR)은 AccuPower® GreenStar^TM RT-qPCR Master Mix (Bioneer, Korea)를 이용하여 진행되었다. Primer 디자인은 NCBI Primer-blast 프로그램을 사용해 제작하였고 ABI StepOne real time system (Applied Biosystem)의 melting curve analysis에서 one-peak test를 통해 gene specific primer임을 확인하였다. 각 온도처리구의 감초 잎에서 RNA를 추출하였고, RT-qPCR을 통해 감초의 유전자 발현양상을 비교, 분석하였다. Phytochrome interacting factor 4 (PIF4)는 식물 호르몬을 유발하는 전사조절을 조정함으로써 고온 신호전달에 핵심적인 역할을 수행한다. 활성화된 Phytochrome B(PhyB)는 PIF4의 활성을 억제한다고 알려졌다. Eukaryotic initiation factors(eIFs)는 mRNA 번역 개시인자로 유전자 발현과 특정 단백질 생산을 조절하는 역할을 한다. 본 결과는 온도조건에서 반응하는 생리적 변화를 전사체 수준에서 조사 분석하여 생리해석의 기초자료로 활용, 국내 감초 재배를 위한 환경조건 구명 및 적지 선정 기초자료로서 활용을 기대한다.

• Journal of Bio-Environment Control
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• v.14 no.3
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• pp.155-159
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• 2005

This study was carried out to investigate the effects of cultivars and to establish the hydroponic cultivation method of spinach (Spinacia oleracea L.) f3r autumn season. Considering the rate of germination, plant height is 25 cm interior and exterior and leaf blade and petiole attitude is erect the best two cultivars 'Artlars', 'Dimple' were selected among the 19 cultivars tested. Seed germination was more than $90{\%}$ in both cultivars of 'Artlars', 'Dimple'. Seed rate of germination drops more or less, but it was cultivar that 'Mahoroba' cultivars is becoming in export standard production, and 'Premium', 'Platon' cultivar which plant height of leaf blade and petiole attitude is erect is about 20 cm was thought by suitable cultivars to domestic. Plant height relationship difference that follow to planting distances decreased according as planting distances growth than $12{\times}11$ cm to $12{\times}15$ cm. In the meantime, the increase of leaf area and fresh weight was increasing transplanting distance. The yield per ha of 14,890 kg in the $12{\times}11$ cm was $67{\%}$ increased than that in the $12{\times}9$ cm. Therefore, $12{\times}11$ cm spacing is considered optimum planting distance for spinach hydroponic cultivation in autumn season.

• Journal of Bio-Environment Control
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• v.31 no.3
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• pp.230-236
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• 2022

This study was carried out to produce two-flowered seedlings, harvest them early in a greenhouse, and extend the harvest period. This study was carried out to effectively produce the second truss blooming seedlings to harvest tomatoes early and extend the harvest period. For production of the second truss blooming seedlings (one stem), the nutrient solution EC was supplied at 1.5, 2.0, 2.5 dS·m^-1, and dynamic management (3.0 → 3.5 → 4.5 dS·m^-1). The seedling period was 60 days, which was 20-40 days longer than conventional seedlings, and 10 days longer than the first truss blooming seedlings (cube seedlings). The plant height was 78 and 77 cm in EC 2.5 dS·m^-1 and dynamic management respectively, which was shorter than EC 1.5 dS·m^-1 with 88 cm. As for the EC in the cube before formulation, dynamic management had the highest EC 5.5 dS·m^-1, and the cube supplied with EC 1.5 dS·m^-1 had the lowest. The production yield by treatment did not a difference among in the second truss blooming seedlings, but the first truss blooming seedlings showed lower productivity than second truss blooming seedlings. The second truss blooming seedling were harvested 35 days after planting on June 4, the first harvest date, and the first truss blooming were harvested in 42 days on June 11th. There was no difference in plant height and root growth due to bending at frequency planting. In the study on the production of the second truss blooming seedlings (two stem), the nutrient solution EC was supplied under 2.0, 2.5, 3.0 dS·m^-1, and dynamic management (3.0 → 3.5 → 4.5 dS·m^-1). The seedling period was 90 days, which was 40-50 days longer than conventional seedlings and 10 days longer than the first truss blooming seedlings (cube seedlings). Plant height was 80 and 81 cm in EC 2.0 dS·m^-1 and 2.5 dS·m^-1 respectively, but was the shortest at 73 cm in dynamic management. EC in the medium increased as the seeding period increased in all treatments. The dynamic management was the highest with EC 5.1 dS·m^-1. There was no difference in yield among EC treatments in the second truss blooming seedlings, which had a longer seeding period of about 10 days, produced 15% more than the first truss blooming seedlings. In order to shorten the plant height of the second truss blooming seedlings, it is judged that the most efficient method is increasing the concentration of nutrient solution.

• Journal of Bio-Environment Control
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• v.21 no.3
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• pp.228-235
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• 2012

This study was carried out to investigate the effect of irrigation methods for reducing a drainage on the growth and yield in rockwool (Grodan co.) and cocopeat (chip : dust = 50 : 50 included fiber) culture. The nutrient solution was irrigated by $100J{\cdot}cm^{-2}$-100 mL, $50J{\cdot}cm^{-2}$-45 mL, $50J{\cdot}cm^{-2}$-40 mL, $50J{\cdot}cm^{-2}$-35 mL ($100{\sim}50J{\cdot}cm^{-2}$-100~35 mL, Nutrient solution 100~35 mL was irrigated per plant when the accumulated radiation was $100{\sim}50J{\cdot}cm^{-2}$). The drain rates per plant of 100-100, 50-45, 50-40, 50-35 were 26.3%, 8.8%, 6% 4.4% and 23.1%, 7.5%, 5% 3.4% in rockwool and cocopeat slabs. The water contents and EC of 100-100 and 50-45 were managed by the 55~70%, $3.0{\sim}5.0dS{\cdot}m^{-1}$ which were good condition for paprika culture in rockwool and cocopeat slabs, while those of 50-40 and 50-35 were managed by beyond 50%, $4.5{\sim}9.5dS{\cdot}m^{-1}$. The plant height, number of branches and leaf size of 100-100 and 50-45 were similarly increased while those of 50-40 and 50-35 were decreased. The fruit size and weight of 50-40 and 50-35 were small and light, while those of 100-100 and 50-45 were similarly big and heavy. The marketable fruits of 100-100 and 50-45 treatments were similarly more by 9.7~9.8 in rockwool and 8.8~8.9 in cocopeat, while the unmarketable fruits, the small and blossom end rot fruits were increased in 50-40 and 50-35 treatments. The yield of 100-100 and 50-45 treatments were similarly high.

• Journal of Bio-Environment Control
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• v.21 no.1
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• pp.66-73
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• 2012

This study was conducted to develope new indoor plants and to investigate the effects of light intensity on the growth of $Distylium$ $racemosum$, $Osmanthus$ $heterophyllus$ and $Damnacanthus$ $indicus$ under 100 lux, 1,000 lux and 2,500 lux fluorescent lighting for six months in the environment-controlled growth chambers. 1. $Distylium$ $racemosum$ : Most of $Distylium$ $racemosum$ under 100 lux light intensity were blighted in two months, whereas it was 100% of survival under 1,000 lux and 2,500 lux after six months. Plant height, number of leaf, leaf width and leaf length became higher as light intensity increased. The plants maintained under 2,500 lux showed the greatest plant height and leaf number. 2. $Osmanthus$ $heterophyllus$ : $Osmanthus$ $heterophyllus$ under 100 lux light intensity were blighted in two months, whereas it was 100% of survival under 1,000 lux and 2,500 lux after six months. However, under 1,000 lux, it paused plant height and was not increased in leaf number any more. A plant growth status showed the highest value under 2,500 lux in all conditions. 3. $Damnacanthus$ $indicus$ : $Damnacanthus$ $indicus$ was defoliated and blighted under 100 lux light intensity in two months, whereas it was grown properly with 1,000 lux or above. However, the growth under 2,500 lux of $Damnacanthus$ $indicus$ was superior to other treatments. But, $Damnacanthus$ $indicus$ under 1,000 lux after 6 months was more favorable chlorophyll contents, leaf length and leaf width than 2,500 lux. As increasing slightly of chlorophyll contents and leaf growth under 1,000 lux, $Damnacanthus$ $indicus$ could be utilized highly to the indoor ornamental plant.

• Horticultural Science & Technology
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• v.30 no.3
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• pp.229-235
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• 2012

This study was carried out to examine the effects of foliar-sprayed diniconazole on the morphological characteristics and the contents of polyamines (PA) and proline, and to investigate their relationship with stress tolerance in Lilium davuricum native to Korea. Plants with 5 cm mean height were sprayed with $50mg{\cdot}L^{-1}$ diniconazole or distilled water (control) and grown in a greenhouse maintained at 23/$18^{\circ}C$ (day/night) for 30 days. Diniconazole decreased plant height, leaf length, diameter and length of the pith and cortical cell of the stem, while it increased the thickness and epicuticular wax of leaves measured at 30 days after treatment. In polyamines contents, diniconazole increased spermidine content at 5-10 days after treatment and spermine content after the 10th day of treatment as compared with the control. Diniconazole decreased proline content after the 10th day of treatment as compared with the control. From these results, it was concluded that foliar-sprayed diniconazole might morphologically and biochemically improve the stress tolerance of this plant species.