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柳點鎬 전북대학교 농업과학기술연구소 1988 農大論文集 Vol.19 No.-
To obtain the basic information for shortening the bleeding period, mass propagation and the production of interspecific hybrids, the lotus (Nelumbo nucifera gasrtn) embryos at 20 days after (lowering were cultured in vitro on the Murashige and Skoog's ( MS) medium which contained the combinations of NAA (O,1,2 ppm) and Kinetin (0,1,2 ppm). The results are as follows. 1. Rooting rate, root number, root length and shoot growth of lotus embryo were remarkable on the basal MS medium without NAA and Kinetin, The higher the concentration of NAA and Kinetin, the more severe the inhibition of their growth sllowed. 2. On the basal MS medium under the light culture, the rooting rate at 20 and 30 days after culture we-re 66% and 100%, and shoot length at those times were 5.9cn and 10.3cn, respectively. While, under the dark culture, the rooting' rate at 20 and 30 days after culture were 16 % and 33%, and shoot length were 10.9 cm and 14.3cm, respectively. 3. The explants at 20 days after culture in vitro could be transplanted on the soil pot. 4. The Induction of callus was not observed at all 5. On the whole, light cultural condition was better than the dark one for the growth of embryo.
大豆에 있어서 生育初基의 斷水處理가 還元糖 및 α-amylase에 미치는 影響
柳點鎬,崔善英,李康壽 全北大學校 1988 論文集 Vol.30 No.-
In order to obtain the basic information for clarifying the mechanism of water stress, effects of water removal (15 days after emergence) on dry weight, chlorophyll and reducing sugar content, α-amylase activity and isozyme pattern were investigated in the early growth stage of soybean plant. The results are as follows. 1. Dry weight of shoot was increased in both the control and the treatment, but the degree of increase was remarkably lower in the treatment than that in the control. After 9 days of the treatment, it was decreased about 42% compared to the control. 2. Water content(%) and chlorophyll content in the leaves showed nearly unchanged in the control, but remarkable decrease in the treatment. After 9 days of the treatment, they came to 60% and to 4.5mg.g DW and decreased 26% and 42%, respectively, compared to the control. 3. Reducing sugar content and α-amylase activity in the leaves remained at almost constant level in the control, but showed almost linear increase in the treatment. After 9 days of the treatment, they came to 26mg/g DW and to 20 units, and reached about 2 and 1.6 times, respectively, compared to the control. 4. α-amylase isozymes showed only b (light stained) and c (dark stained) isozymes in the control and remained in color intensity during the period of investigation, while, in the treatment, a new a band was observed 3 days after the treatment, and a and b isozmes also became dark stained condition from 7 days after the treatment.
버어리종 담배의 수량과 품질에 미치는 심경다비의 영향에 관한 연구
유점호,김대송,한철수,이규상 한국연초학회 1979 한국연초학회지 Vol.1 No.2
심경과 多肥栽培가 버어리種 담배의 收量 및 品質에 미치는 영향을 구명하고자 耕土깊이를 10,20,30cm로 하고 施肥水準을 標準施肥(138kg/10a), 20%增肥, 40%增肥로 하여 3년간(1976-1978) 實驗한 결과 收量 및 品質 공히 심경 다비할수록 증가하여 수량은 耕土깊이 30cm 구에서 5%, 40%增肥區에서 13%가 증가하였으며 품질은 심경과 다비로 각각 2%씩 증가하였다. This experiment was carried out determine the effect of plowing depth and heavy fertilization on the yield and quality of Burley tobacco. In the experiment, three plowing depth (10, 20, 30cm) and three levels of compound fertilizer (138, 166, 193kg/10a) were employed with split plot design for three years (1976-1978). Yield and quality were increased with deeper plowing and heavier fertilization. Yield was increased by 5% at the plowing depth of 30cm and 13% at the fertilizing level, 193kg/10a. The value per kg was increased by 2% plowing depth of 30cm and at the fertilization of 193kg/10a, respectively.
참깨(Sesamum indicum L.)의 葯培養에 의한 半數體 育成 : II.Haploidal Callus 誘起에 미치는 低溫處理,培地,培養條件 및 品種의 影響
柳點鎬,金濟桓,杜洪秀,權泰鎬 전북대학교 농업과학기술연구소 1993 農大論文集 Vol.24 No.1
This studies were conducted to provide the basic information about the duration and temperature of cold treatment, media, cultural condition, varieties and F1 on callus induction using the anther of sesame(Sesamum indicum L. and S. orientale L.). 1. Duration of cold treatment to induct the haploidal callus was the most effective for 2~44days in 10˚C both Danbaek and Wild type. 2. Murashge and Skoog's medium was more effective than any others in anther culture. 3. Continous dark culture was the most effective and combination of dark and light was less effective than continous dark culture. 4. Induction ratio of haploidal callus in Danbaek and Wild type was the highest than any others and that of F1 hybrid was less than dornor plant.
柳點鎬,崔善英,金濟桓,李康壽 全北大學校 1993 論文集 Vol.35 No.-
In order to find out the influence of shading degree on the growth, pod setting, protein contents, RuBPCase activity, photosynthesis and yield in soybean plants, two soybean varieties, Hill and Etaka were cultivated under the 0%(full sun light), 20%, 65% and 90% shading conditions. Protein contents, RuBPCase activity and photosynthesis of leaves in Hill were decreased linearly with the higher shading, but those in Etaka were increased up to 20% shading, and then decreased more rapidly than Hill when the shading was above 65%. Pod sets were decreased with the higher shading degree, and those of the degree were severe in upper nodes. The stem heights were increased in accordance with the shading up to 65%, but stem diameter and No. of branches were decreased linearly with the higher shading degree. The yield of Hill was decreased linearly with the higher shading degree, but that of Etaka were increased up to 20% shading, and decreased inure severely than Hill when the shading was above 65%. From the above results : Etaka is more suitable than Hill to weak shading which occurred in the case of intercropping, companion cropping and alternating cropping, and the shading degree must not go over above 20%.
組織培養에 의한 Alfalfa와 Italian ryegrass의 耐鹽性 및 耐酸性 系統選拔에 관한 硏究
柳點鎬,許三男,崔善英,權泰鎬,金鏞喆 전북대학교 농업과학기술연구소 1991 農大論文集 Vol.22 No.1
This study were conducted to provide the basic information for the selection of salt and alluminum tolerant lines in Alfalfa (Medicago sativa L.) and Italian ryegrass (Lolium multiflorum L.) by tissue culture. Cotyledon, hypocotyl and roots of alfalfa were cultured on the Blaydes medium, first node and roots of Italian ryegrass were cultured on the MS medium to induce callus. Single cell and callus were selected on the medium containing different levels of NaCl and AICl3. Germination rate of seeds were decreased ,as the increase of NaCl and AICl3 levels, and severe aslt injuring were occur설 above the 0.5% NaCl level. Alfalfa showed higher cal]us induction rate than Italian ryegrass. Callus induction rate were high in hypocotyl of alfalfa and first node of Italian ryegrass, but callus growth after induction in cotyledon of alfalfa was better than those of hypocotyl. Selection rate of NaCl and AlCl3 tolerant callus became high after the suspension culture. 0.5% NaCl and 200㎛ AIC3 were available concentration for screening salt and alluminum tolerant callus Na+ in callus was increased as the increasing NaCl level on the medium, K+ in the callus was decreased. Selected NaCl tolerant callus show high in Na+, K+ and proline contents compare to nonselected callus,. Proline and alluminum contents in the callus were good indicators for the selection of salt and alluminum tolerant lines.