• 제목/요약/키워드: plant cultured cells

검색결과 271건 처리시간 0.023초

Enhancement of eurycomanone biosynthesis in cell culture of longjack (Eurycoma longifolia) by elicitor treatment

  • Nhan, Nguyen Huu;Loc, Nguyen Hoang
    • Journal of Plant Biotechnology
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    • 제45권4호
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    • pp.340-346
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    • 2018
  • In this study, the effect of elicitors such as yeast extract (YE), methyl jasmonate (MeJA) and salicylic acid (SA) on the accumulation of eurycomanone in Eurycoma longifolia cell cultures were investigated. Suspension cells of E. longifolia was cultured in Murashige and Skoog (MS) medium supplemented with 30 g/L sucrose, 1.25 mg/L naphthaleneacetic acid (NAA) and 1 mg/L kinetin at a shaking speed of 120 rpm. Elicitors were added in the culture at different concentrations and times to stimulate eurycomanone accumulation in the Eurycoma longifolia cells. Eurycomanone content was determined by HPLC with a C18 column, flow rate of 0.8 mL/min, run time of 17.5 min, and a detector wavelength of 254 nm. The stationary phase was silica gel and the mobile phase was acetonitrile: $H_2O$. Non-elicited cells were used as the control. The study showed the effect of different elicitor concentrations, YE at 200 mg/L, MeJA at $20{\mu}M$ and SA at $20{\mu}M$ stimulated high production of eurycomanone. In which, treatment of $20{\mu}M$ MeJA after 4 days of culture resulted in the highest accumulation of this compound (17.36 mg/g dry weight), approximately 10-fold higher than that of untreated cells (1.70 mg/g dry weight).

패랭이꽃속 Dianthus gratianopol의 현탁배양세포로부터 Shoot 증식과 식물체 재분화 (Shoot Proliferation and Plant Regeneration from Suspension-Cultured Cells of Dianthus gratianopol)

  • 김준철
    • Journal of Plant Biotechnology
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    • 제32권4호
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    • pp.301-306
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    • 2005
  • 패랭이꽃속 Dianthus gratianopol 잎절편체로부터 캘러스를 유기하여 표면에 광택이 있고 치밀하게 배열되고 연한 녹색의 shoot-forming 캘러스를 선별하였다. 유기된 캘러스를 잘게 자르고 1.0 mg/L 2,4-D와 0.5 mg/L BAP가 포함된 CP 액체배지에서 7일 간격으로 계대배양하여 균일한 SF형태의 조직이 치밀한 세포괴를 얻을 수 있었고 이들 세포괴를 1.0 mg/L 2,4-D와 0.5 mg/L BAP, 1.5 mg/L 2,4-D와 0.5 mg/L BAP의 MS고체배지에서 배양했을 때 재분화능력이 있는 캘러스를 유도할 수 있었다. 이들 캘러스는 1.0mg/L TDZ과 0.5 mg/L PAA가 포함된 MS재분화배지에 치상하였더니 녹화되기 시작하여 배양 4주후부터는 다량의shoot 원기가 형성되고 shoot증식이 가능하였으며 평균 87%의 shoot 형성률을 보였다. 배양 9주후 절단된 shoot는 0.1 mg/L NAA가 첨가된 배지에서 뿌리를 형성하여 화뢰와 꽃을 갖고 있는 완전한 식물체로 재분화되었다. 또한 재분화 능력이 있는 캘러스 정단 원기를 절단한 절편체는 1.0 mg/L TDZ 과 0.5 mg/L PAA가 포함된 MS재분화 배지에서 직접 부정아를 형성하였고 이들 부정아로부터 다량의 shoot 증식이 가능하여 식물체를 효과적으로 얻을 수 있었다.

고구마 배양세포에서 Peroxiredoxin cDNA의 분리 및 발현 특성 (Molecular Cloning and Characterization of a Peroxiredoxin cDNA from Cell Cultures of Sweetpotato)

  • 박수영;류선화;권석윤;김종국;곽상수
    • Journal of Plant Biotechnology
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    • 제30권2호
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    • pp.135-141
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    • 2003
  • Peroxiredoxin(Pix) are large family of peroxidases that reduce alkyl hydroperoxides and hydrogen peroxide. A cDNA clone (referred to as swPrxl) encoding Pix was from a sweetpotato cDNA library constructed from suspension-sultured cells, and its expression was investigated in terms of stress. The swPrxl contained an open reading frame (ORF) encoding mature protein of 193 amino acids with calculated molecular mass of 20.8kDa. The predicted amino acid sequence of swPrxl has two conserved cysteines that are essential resicues for the reduction of peroxides. It showed high amino acid sequence homology ot PixIIF of Arabidopsis (77%) and putative Prx of rice(72%). RNA gel-blot analysis showed that swPrxl gene was expressed dominantly in leave among intact tissues, and also highly detect in suspension-cultured cells. Interestingly, the level of swPrxl transcripts was almost the same regardless of the growth stage in suspension culture. Furthermore, the transcription level of swPrxl gene was not significantly changed in response to various stress treatments such as wounding, extreme temperature and stress-related chemicals RT-PCR analyses.

Inhibition of mTOR signaling pathway by aqueous extract of Siberian ginseng

  • Byun, Boo Hyeong;Cho, Tae Hwan;Park, Kyeong Mee
    • 대한한의학회지
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    • 제38권2호
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    • pp.7-14
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    • 2017
  • Objectives: This study evaluated the effect of aqueous extract from roots of Siberian ginseng on mTORC1 pathway. Methods: mTORC1 activity was measured by the phosphorylation status of p70 S6 kinase (S6K) in HeLa cells as well as the brain, liver and muscle tissues in diabetic db/db mice. Autophagy induction after the treatment of Siberian ginseng extract was evaluated by monitoring the conversion of cytoplasmic LC3I into lipidated LC3II in cultured human HeLa GFP-LC3 cells. Cell cycle analysis was performed in HeLa cells treated with Siberian ginseng using flow cytometry. Results: Among >2,800 plant products used for oriental medicine, Siberian ginseng was found to inhibit mTORC1 to phosphorylate S6 kinsase (S6K) in HeLa cells as well as the brain, liver and muscle tissues in diabetic db/db mice. Siberian ginseng-mediated mTORC1 activity was reversible unlike the prolonged suppression of mTORC1 by rapamycin when HeLa cells were grown in fresh media after the removal of the inhibitors. Siberian ginseng extract at concentrations to inhibit mTORC1 was not overly cytotoxic in cultured HeLa cells whereas rapamycin was obviously cytotoxic. The conversion of cytoplasmic LCI into lipidated LCII was increased by fivefold in HeLa GFP-LC3 cells treated with Siberian ginseng extract. Progression of cell cycle was attenuated at G2/M phase by the treatment of Siberian ginseng extract. Conclusions: These results suggest that the aqueous extract of Siberian ginseng possibly plays a good therapeutic role in various diseases involving mTORC1 signaling.

Production of Polyhydroxybutyrate from Crude Glycerol and Spent Coffee Grounds Extract by Bacillus cereus Isolated from Sewage Treatment Plant

  • Lee, Gi Na;Choi, So Young;Na, Jonguk;Youn, HaJin;Jang, Yu-Sin
    • KSBB Journal
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    • 제29권6호
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    • pp.399-404
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    • 2014
  • Production of biodegradable polymer polyhydroxyalkanoates (PHAs) from industrial wastes exhibits several advantages such as recycle of waste and the production of high valuable products. To this end, this study aimed at isolating from the sewage treatment plant a PHA producing bacterium capable of utilizing wastes generated from biodiesel and food industries. A Bacillus cereus strain capable of producing poly(3-hydroxybutyrate) [P(3HB)] was isolated, which was followed by confirmation of P(3HB) accumulation by gas-chromatographic analyses. Then, the effects of nutrient limitation on P(3HB) production by B. cereus was first examined. Cells cultured in a minimal medium under the limitation of nitrogen, potassium and sulfur suggested that nitrogen limitation allows the highest P(3HB) accumulation. Next, production of P(3HB) was examined from both waste of biodiesel production (crude glycerol) and waste from food industry (spent coffee grounds). Cells cultured in nitrogen-limited minimal medium supplemented crude glycerol and waste spent coffee grounds extract accumulated P(3HB) to the contents of 2.4% and 1.0% of DCW. This is the first report demonstrating the capability of B. cereus to produce P(3HB) from waste raw materials such as crude glycerol and spent coffee grounds.

인삼재배지의 토양추출물이 종자 발아와 세포의 항산화효소 활성에 미치는 영향 (Cell Viability and Antioxidant Enzyme Activity in the Cell of Ginseng (Panax ginseng C.A. Meyer) Treated with Soil Extracts)

  • 류태석;권순태
    • 한국자원식물학회지
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    • 제21권4호
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    • pp.324-328
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    • 2008
  • 인삼재배지 180지점으로부터 토양을 채취하여 토양산도, 유기물함량 및 유효인산함량을 측정한 결과 재배년수별 유의한 차이는 나타나지 않았다. 채취한 토양의 메탄올추출액으로 상추종자 발아실험을 실시한 결과 $5{\sim}6$년 재배지의 토양에서 종자발아나 유묘생장을 강하게 억제하는 토양추출액을 선발하였다. 선발된 토양 추출액중 발아와 유묘생장을 억제하였던 추출액은 인삼배양세포의 활력을 최대 90%까지 억제하였으나 전해물질의 누출은 증가하지 않았다. 토양추출액으로 세가지 종류의 항산화 효소 활성을 측정한 결과 superoxide dismutase는 거의 영향을 받지 않았으나, 상추유묘의 생체중억제형 토양추출액을 처리한 인삼배양세포의 peroxidase의 활성이 현저하게 억제되었고, catalase의 활성은 발아억제형 및 생체중억제형 토양추출액 모두에서 유의한 억제를 보였다.

식물체를 이용한 조류증식억제 효과 (Inhibitory Effect of Microcystis aeruginosa (Cyanophyceae) Growth by Plants in vitro)

  • 정원화;변명섭;전선옥;임병진
    • 생태와환경
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    • 제33권2호통권90호
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    • pp.136-144
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    • 2000
  • 팔당호 주변에서 자생하는 식물체를 이용하여 실험실 내에서 배양된 남조류에 투여하여 조류증식 억제 효율을 조사하였다. 조류 성장 억제 효과에 있어 육상식물을 이용하는 경우 조류 밀도가 10$^{4}$ cells/ml 범위에서의 0.5g/l 투여량은 전혀 효과를 나타내지 못했던 반면, 2.5 g/l 투여량에서는 95% 이상의 효과를 보였다. 조류 밀도가 10$^{6}$ cells/ml 범위에서의 육상식물 투여량은 2.5 g/l 이상이 필요했다. 조류성장 억제에 육상식물은 잣잎, 수생식물은 애기마름이 큰 효과를 보였다. 애기마름 투여조는 조류 밀도가 10$^{6}$ cells/ml 범위에서도 2.5 g/l 투여량으로 50%의 억제 효율이 나타났다. 식물을 이용한 조류 증식 억제 효과는 식물 투여 후 7일째 후 가장 효과가 좋은 것으로 나타났다. 습체, 건체, 추출물 비교시 추출물이 가장 효과가 좋은 것으로 육상식물 투여조의 경우 1.25 g/l 투여량에 비해 2.5 g/l 투여량에서 현저한 효과를 보였고, 애기마름은 1.25 g/l 투여량에서도 99%의 효과를 보였다. 건체식물은 습체식물에 비해 초기에도 높은 효과를 보였다. 조류의 비증식속도로 보았을 때도 식물체 추출물을 투여했을 때 가장 효과가 좋았고 다음으로 건체, 습체식물 투여순으로 조류 증식억제 효과를 나타내었다.

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약용식물 추출액이 우산이끼 자가관양배양세포의 생존율, 엽록소함량 및 광합성전자전달 활성에 미치는 영향 (Effects of Several Medicinal Plants Extract on Survival Rate, Chlorophyll Contents and Photosynthetic Electron Transport Activity of Liverwort Photoautotrophic Cultured Cell)

  • 정형진;권순태;김시무
    • 한국작물학회지
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    • 제40권2호
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    • pp.133-141
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    • 1995
  • 약용 식물의 추출액이 자가영양배양세포의 광합성전자전달계에 미치는 영향을 조사하기 위해 9종의 약용식물 추출액으로부터 종자발아, PA세포의 엽록소 억제정도, DCIP의 환원율, 세포 생존율, 광계 I의 전자전달활성, 단백질에 미치는 영향을 조사한 결과는 다음과 같다. 1. 식물의 추출액을 농도별로 처리하였을 때 10% 처리시 전 식물체에서 상추의 발아억제 현상을 나타내었고, 특히 백두옹과 초오 추출물 10% 처리시는 100% 억제를 나타내었다. 2. 백두옹의 증류수 및 MeOH 추출액을 PA세포에 처리한 경우 엽록소의 생성을 100% 억제 하 였다. 이는 광합성 전자전달 저해제로 알려진 DCMU 10-3M 처리와 동일한 억제 효과였다. 3. PA세포에 추출물 처리시 백두옹이 힐반응 억제가 가장 컸으며, 세포 생존력은 가장 낮았다. 4. 광합성 산소발생은 반하, 독활, 백두옹, 만형자 추출액 처리시 14-77% 억제되었고, 특히 PA 세포 2ml 반응액에 백두옹 추출물 60rl 처리시 50% 산소발생 억제를 나타내었다. 5. 추출액을 PA 세포에 처리한 후 단백질을 추출하여 SDS-PAGE를 이용하여 조사한 결과 대조구에 비하여 백두옹 추출물 10% 처리에서 14KD, 31KD, 41KD, 53KD, 73KD의 밴드가 나타나지 않았다.

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THE STUDY ON TISSUE CULTURED WILD MOUNTAIN GINSENG(Panax Ginseng C.A. Meyer) ADVENTITIOUS ROOTS EXTRACT AS A COSMETIC INGREDIENT

  • Jung, Eun-Joo;Park, Jong-Wan;Kim, Joong-Hoi;Paek, Kee-Yoeup
    • 대한화장품학회:학술대회논문집
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    • 대한화장품학회 2003년도 IFSCC Conference Proceeding Book I
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    • pp.611-616
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    • 2003
  • Korean ginseng(Panax Ginseng C.A. Meyer) known as a oriental miracle drug is an important medicinal plant. Ginseng has been used for geriatric, tonic, stomachic, and aphrodisiac treatments for thousands years. Also, it is an antibiotic and has therapeutic properties against stress and cancer. Ginseng is widely distributed all over the world. Among them, Korean mountain ginseng has the most valuable effect on pharmaceuticals. The roots of mountain ginseng contained several kinds of ginsenosides that have many active functions for the human body. However, the study of mountain ginseng has a limit because the mountain ginseng is very expensive and rare. So, we artificially cultured mountain ginseng adventitious roots using the bioreactor culture system. We induced callus from original mountain ginseng, directly dug up in mountain and aged about one hundred ten years. Separated adventitious roots were precultured in 500ml conical flasks and then, transferred in 20L bioreactors. The adventitious roots of mountain ginseng were harvested after culturing for 40days, dried and then, extracted with several solvents. In this study, we investigated the whitening effect, anti-wrinkle effect and the safety of tissue cultured adventitious roots extract of mountain ginseng in order to identify the merit as a cosmetic ingredient. Particularly, extract of mountain ginseng adventitious roots showed whitening and anti-wrinkle effects. The inhibitory effect of this extract on the melanogenesis was examined using B-16 melanoma cell. When B-16 melanoma cells were cultured with adventitious root extract, there was a dramatically decrease in melanin contents of 8-16 melanoma cell. And we identified this extract inhibited Dopa auto-oxidation significantly. Also, when transformed mouse fibroblast L929 cells were treated with this extract, there was a significant increase in collagen synthesis. The results show significant inhibited melanization and wrinkle without inhibiting cell viability.

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Arabidopsis thaliana의 엽육세포 원형질체배양에 미치는 칼슘이온의 영향 (Effect of Calcium Ion on Mesophyll Protoplast Culture of Arabidopsis thaliana)

  • 박현용
    • 식물조직배양학회지
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    • 제22권5호
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    • pp.277-281
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    • 1995
  • 칼슘이온의 농도가 Arabidopsis thaliana의 원형질체배양에 미치는 영향을 조사하기 위해 Arabidopsis thaliana의 원형질체를 분리하여 서로 다른 농도의 CaCl$_2$를 첨가한 IMH 배지에서 배양하면서 나타나는 현상을 관찰하였다. 대조군과 12.5 mM 이하의 농도에서는 배양세포들이 심하게 액포화되었으며 세포분열은 관찰되지 않았다. 0-50 mM 범위의 농도에서는 농도의 증가와 비례하여 세포의 액포화가 적었으며 이에 반하여 plasma rich cell의 비율은 높아졌다. 세포분열의 유도는 25 mM 이상의 농도에서 관찰되었고 50mM에서 가장 높은 평판효율(5-6%)을 나타내었다. 그러나 100 mM 이상의 농도에서는 뚜렷한 저해효과를 나타내었다. 칼슘이온의 투여 시기가 세포분열과 콜로니 형성과정에 미치는 영향을 조사하기 위하여 서로 다른 농도의 칼슘이온을 각각 원형질체 분리용액과 배양액에 투여하고 배양한 결과, 투여 시기에 따른 영향은 콜로니의 형성과정에 다소 차이를 보였다. 이처럼 높은 칼슘 농도가 원형질체 배양시 요구되는 것은 원형질체가 배지로부터 생장조절물질을 흡수하여 재분화하는 과정에서 칼슘이온이 중요한 조절작용을 하기 때문인 것으로 추측된다.

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