• 제목/요약/키워드: Plant stimulation

검색결과 157건 처리시간 0.014초

Anti-inflammatory Effects of Scrophularia Koraiensis Nakai via NF-κB and MAPK Signaling Pathways in LPS-induced Macrophages

  • Da-Yoon Lee;So-Yeon Han;Hye-Jeong Park;Seo-Yoon Park;Jun-Hwan Jeong;Yoon-Jae Kwon;Tae-Won Jang;Jae-Ho Park
    • 한국자원식물학회:학술대회논문집
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    • 한국자원식물학회 2022년도 추계학술대회
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    • pp.107-107
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    • 2022
  • Scrophularia koraiensis Nakai is widely used to remedy fever, edema, and neuritis. S. koraiensis has harpagoside and angoroside C, these compounds have been reported to alleviate inflammation, rheumatic diseases, and analgesic stimulation. We evaluated the anti-inflammatory effects of the ethanol extract of S. koraiensis (SKE) in lipopolysaccharides (LPS)-induced macrophages. At cellular levels, SKE decreased the production of nitric oxide (NO), the expression of inducible nitric oxide synthase (iNOS), and cytokines (IL-1b, TNF-a, and IL-6) under the LPS stimulation. SKE inhibited the phosphorylation of nuclear transcription factor-kappa B (NF-κB) p65 and its inhibitor (IκB-α). In addition, SKE suppressed the phosphorylation of extracellular signal-regulated kinase (ERK), c-Jun N-terminal kinase (JNK), and p38 in the mitogen-activated protein kinase (MAPK) pathway. In conclusion, SKE could be considered a potential resource for attenuating inflammation response and it may be utilized in the material for cosmetics, food additives, and tea.

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STUDIES ON THE PHYSIOLOGY OF DEVELOPMENT IN CROPS. 4. STUDIES ON PHYTOPERIODICAL CONTROL FOR TUBER FORMATION IN SWEET POTATO

  • Kim, Yong-Choll
    • Journal of Plant Biology
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    • 제2권1호
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    • pp.35-42
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    • 1959
  • 1. 발아시부터 단일, 암기저온 조건하에서는 괴근은 전연 형성되지 않고, 장일조건에서만 괴근이 형성됨. 따라서 장일조건이 고구마괴근 형성에 대한 유도조건 내지 촉진조건임을 알 수 있다. 2. 본실험은 시종 약전광(300W 전구 사용)으로 재배하였기 때문에 동화작용이나 생장이 특히 미약한 상태에서도 괴근이 유도되었다. 따라서 괴근형성에는 동화물질이나 생장보다도 장일조건이 직접적결요인을 이루는 1종자극을 성립하는 것으로 보인다. 3. 장기조건과 단일조건하의 근계가 서로 특이한 상태를 나타냈고 그것은 단일과 장일조건이 이룬 자극과 관계하는 것으로 보인다. 4. 고구마괴근이 장일조건에 유되되는 사실의 생태학적 의의를 고찰함.

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The Stimulation of Arginine Decarboxylase Activity by alpha-Difluoromethyl$ Ornithine in Tobacco Suspension Cultured Cells

  • Lee, Sun-Hi;Kim, Yong-Bum;Lee, Myeong-Min;Park, Ki-Young
    • Journal of Plant Biology
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    • 제39권2호
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    • pp.107-112
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    • 1996
  • To study the compensatory aspect of putrescine biosynthetic enzyme n tobacco suspension cultured cells, we examined the contents of the cellular polyamines and the activities of arginine decarboxylase (ADC, EC 4.1.1.19) and ornithine decarboxylase (ODC, EC 4.1.1.17) in the tobacco suspension cells treated with $\alpha$-difluoromethyl arginine (DFMA) or $\alpha$-difluoromethyl ornithine (DFMO). In the untreated cells, the content of the cellular putrescine was decreased during the first 3 hours and then subsequently increased. However, the content of the cellular spermidine and spermine remained constant during the incubation time. While ADC activity increased after 6 hours, ODC activity decreased following the rapid increase until 6 hours. DFMA induced the decrease in the contents of putrescine and spermidine, and the increase in that of spermine. It also caused the inhibition of ADC and ODC activities throughout the incubation time. DFMO produced the stimulation of ADC activity about 2 times of untreated cells and the decrease in the content of putrescine about 50% of them at 12 hour. The application of putrescine or cycloheximide prevented the increase of ADC activity by DFMO but that of actinomycin-D did not show any detectable effect. The stimulation of ADC activity by DFMO in tobacco suspension cultured cells was probably due to the enhancement of de novo synthesis for ADC protein, which might be regulated in the translation step by the content of the cellular putrescine.

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"큰개별꽃" 엑기스의 약리학적(藥理學的) 연구(硏究) (Pharmacological Studies on Pseudostellaria palibiniana)

  • 양기숙;김태희
    • 생약학회지
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    • 제15권1호
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    • pp.6-14
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    • 1984
  • Pharmacological studies have been carried out with the methanol extract of the whole plant of Pseudostellaria palibiniana Ohwi (Caryophyllaceae). The results showed that it had stimulation effect on heart, hypotensive actions depending on extract contents, stimulation effect on respiration, contraction on excised intestines, enhancement of tension on excised uterus, antineoplastic activity on Ehrlich carcinoma, liver protective activity against $CCl_4$ intoxication, writhing and diuretic activities.

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연자성 세라믹 분말에 의한 식물세포 및 조직의 생장촉진 효과 (Stimulation Effect of a Soft Ferrite Ceramic Powder on Growth in Plant Cell and Tissue Cultures)

  • 안준철;김유정;박찬영;황백
    • KSBB Journal
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    • 제13권5호
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    • pp.530-534
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    • 1998
  • The addition of the ceramic powder as state of bare in culture medium has stimulated the growth of Achyranthes japonica in both the disorganized cell and the plantlet. The grwoth rate of Hyoscyamus niger adventitious root and Pylatycodon grandiflorum hairy root was enhanced up to 100 and 250%, respectively, even though Scopolia parviflora hairy root and Hyoscyamus albus adventitious root were not. The ceramic powder has enhanced the growth of H. niger adventitious root even in a test tube immersed into its culture medium to irradiate alone without any direct contact. The ceramic powder seems to have a significant role on both the growth and the physiological action of some plants.

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브러싱 자극 토마토 공정묘의 지상부와 지하부 생육 변화 (Changes in Shoot and Root Growth of Tomato Seedlings Stimulated by Brushing)

  • 정현우;황희성;황승재
    • 생물환경조절학회지
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    • 제32권3호
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    • pp.205-209
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    • 2023
  • 기계적 자극은 식물체의 형태적 변화를 유도하는 것으로 알려져 있다. 본 연구에서는 기계적 자극을 적용한 토마토의 육묘기 동안의 생육 변화를 확인하기 위해 수행되었다. 브러싱 처리가 기계적 자극으로 이용되었으며, 아크릴이 부착된 이송장치를 이용하여 2시간 간격으로 파종 후 10일 이후부터 처리를 진행하였다. 브러싱 처리 동안 생육 변화를 확인하기 위해 3일 간격으로 생육을 조사하였다. 초장과 엽면적은 브러싱 처리에서 대조구에 비해 감소하는 결과를 보였으며 지상부의 생체중과 건물중은 대조구와 유사한 값을 보였다. 총 근장과 지하부 표면적은 브러싱 처리에서 대조구에 비해 증가하였으며, 지하부 부피는 대조구와 브러싱 처리가 유사한 값을 보였다. 결론적으로 토마토 공정묘에 브러싱 처리는 지상부의 생육 감소를 유도하였으며 지하부의 형태적 발달을 증가시키는 것으로 판단된다.

브러싱 소재에 따른 토마토 공정묘의 생장억제 (Growth Suppression of Tomato Plug Seedlings as Affected by Material Type for Brushing Stimulation)

  • 정현우;이혜리;황희성;김은빈;황승재
    • 생물환경조절학회지
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    • 제29권4호
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    • pp.313-319
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    • 2020
  • 본 연구는 토마토 공정묘 생산 시 생장 억제를 위한 적정 brushing 소재를 구명하기 위해 수행하였다. 토마토 종자를 상업적 공정육묘용 상토가 충진된 40구 플러그 트레이에 파종하였으며, 파종 후 18일째부터 brushing 자극을 처리하였다. Brushing 소재는 연질 아크릴, 폴리프로필렌, 직조필름 소재를 이용하여 brushing 처리를 하였으며, 대조구로 무처리구와 diniconazole을 엽면살포 처리하였다. 연질 아크릴 처리에서 초장이 유의적으로 가장 짧았고, 경경은 가장 두꺼웠다. 잎의 크기는 diniconazole 처리에서 가장 낮았으나, SPAD값은 가장 높게 나타났다. 연질 아크릴 처리에서 T/R율이 가장 낮고, 왜화율과 충실도가 가장 높게 나타났다. 결과적으로, brushing 자극 처리를 위해 연질 아크릴 소재를 이용하는 것이 diniconazole 처리 보다 왜화율이 높아 도장 억제에 유리하며 묘 소질이 우수한 묘를 생산하는데 적절할 것으로 판단된다.

인체 락토페린 생산 형질전환 고구마 개발 (Development of transgenic sweet potato producing human lactoferrin)

  • 민성란;김재화;정원중;이영복;유장렬
    • Journal of Plant Biotechnology
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    • 제36권3호
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    • pp.224-229
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    • 2009
  • Human lactoferrin is an iron-binding glycoprotein with many biological activities, including the protection against microbial and virus infection and stimulation of the immune system. We introduced a human lactoferrin (hLf) cDNA under the control of 35S promoter into sweet potato by particle bombardment. Transgenic plants were regenerated via somatic embryogenesis. Transgenic plants were produced typical tuberous roots in soil. PCR, Southern and northern analyses confirmed that the hLf cDNA was incorporated into the plant genome and was properly expressed in plants. Western blot analysis showed that the 80 kDa full length hLf protein was produced in transgenic tuberous roots. Overall results indicated that sweet potato would be an excellent host to produce human therapeutic proteins.