• 제목/요약/키워드: tubers

검색결과 360건 처리시간 0.053초

매자기 槐莖의 發芽에 미치는 環境 要因들 (Environmental factors influencing on tuber germination in scirpus maritimus l.)

  • Yang, Hae-Kyeng;Kim, Ok-Kyung
    • The Korean Journal of Ecology
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    • 제15권2호
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    • pp.127-135
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    • 1992
  • The effects of nacl concentration, temperatura, light and growth regulator(GA3, kinetin) on the tuber germination of s. maritimus were investigated. The germination percentage increased with decreasing nacl, showing salt tolerance through time, and with increasing temperature untile 20~30oC light / dark (12/12 hr) of optimal temperature. The multiplication of nacl and temperature on germination percentage and velocity, increased significantly in higher temperature than lower temperature in saline. The germination percentage showed high value in dark condition than in light condition which is the charracteristics of underground organ. and ga3 act as germination stimulator to overcome the inhibitory effect of nacl. The effect of ga3 showed significant differances on tubers of s. maritimus of germination but that of kinetin had a litter sffects on germination. Factors of nacl and temperature interacted significantly and the effects of nacl on germination percentage and velocity depended on temperature condition.

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향부자의 성분 및 Nitric Oxide 생합성 저해효과 (Chemical Components of Cyperus rotundus L. and Inhibitory Effects on Nitric Oxide Production)

  • 김선기;황방연;강신정;이정준;노재섭;이경순
    • 생약학회지
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    • 제31권1호
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    • pp.1-6
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    • 2000
  • Five compounds were isolated from the methanol extract of the tubers of Cyperus rotundus (Cyperaceae). They were identified as cyperol(1), ${\alpha}-cyperone(2)$, cyperotundone(3), sugetriol triacetate(4) and ${\beta}-sitosterol(5)$ on the basis of spectroscopic and physicochemical analysis. Among them, cyperol, ${\alpha}-cyperone$ and cyperotundone were shown inhibitroy effects on LPS-induced nitric oxide production in RAW 264.7 cells in a dose dependent manner.

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Erwinia rhapontici가 기주식물 조직에서 생산한 Pectate Lyase의 특성 (Characterization of Pectate Lyase Produced by Erwinia rhapontici During Growth in Host Plant Tissue)

  • 최재을
    • 한국식물병리학회지
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    • 제10권3호
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    • pp.163-168
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    • 1994
  • Erwinia rhapontici causes soft-rot disease in a number of plants such as rhubarb, onion, hyacinth and garlic. Pectate lyase (Pel) depolymerizes pectin and other polygalacturonates, which is though to play a role in bacterial invasion of plants. Pel activity was not detected in E. rhapontici cultured in a minimal salts medium containing glycerol, polygalacturonate, or citrus pectin as a carbon source. However, when sterilized potato tuber and Chinese cabbage slices were added to minimal salts polygalacturonate (0.5%) medium, E. rhapontici produced pectate lyase enzyme. Also Pel activity was consistently detected from macerated potato tubers, Chinese cabbage leaves, lettuce leaves and celery petioles tissue. Pel in the extract of macerated Chinese cabbage caused by E. rhapontici strain 1, resulted in electrolyte loss, tissue maceration and cell death of potato tuber tissue. These results indicate that E. rhapontici produces pectate lyase only in the presence of non-diffusible plant components, and that this enzyme probably contributes to its pathogenicity.

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A new record for Korean flora: Scutellaria tuberifera C. Y. Wu & C. Chen (Lamiaceae)

  • Kim, Chan-Soo;Kim, Soo-Young;Byun, Gwang-Ok
    • 식물분류학회지
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    • 제41권3호
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    • pp.249-252
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    • 2011
  • Scutellaria tuberifera C. Y. Wu & C. Chen belonging to Lamiaceae, a species previously unrecorded for Korean flora, was collected streamside in the Andeok valley of Seogwipo-Si, on Jeju island. This species can be distinguished from others of Scutellaria from Korea by having rhizomes with leafless and branching stolons at the nodes, globose to ovoid tubers 5-7 mm in diameter at the terminal parts, and stems densely spreading pilose. Photos of the habit and illustration are provided.

The Metabolism of (4-$^{14}C$) Cholesterol on Photoperiodism in Solanum andigena

  • Bae, Moo;Mercer, E.I.
    • Nuclear Engineering and Technology
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    • 제2권3호
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    • pp.179-183
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    • 1970
  • Solanum andigena의 광주성 주기중의 방사성 콜레스테롤의 대사를 연구하였다. 대사산물로서 방사성 솔라닌과 그 가수분해물 솔라니딘을 분리 결정화하였으며, 콜레스테롤은 이 식물체 내에서 형성되는 에스테르화된 형태로 분리하였다. 단일 및 장일식물간의 콜레스테롤을 대사에는 뚜렷한 차이는 찾아 볼 수 없으나. 괴경중의 스테로이드 알카로이드에 콜레스테롤이 관여하고 있는 것으로 논의되었다.

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Two New Steroidal Saponins from the Tuberss of Liriope spicata

  • Lee, Do-Yong;Son, Son-Ho;Do, Jae-Chul;Kang, Sam-Sik
    • Archives of Pharmacal Research
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    • 제12권4호
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    • pp.295-299
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    • 1989
  • Two novel steroidal saponins designated as spicatosides A(1) and B(2) were isolated from the tubers of Liriope spicata and their structures were elucidated as 25(S)-rus-cogenin -1-0- fJ - D-glucopyranosyl (1$\rightarrow$2)- [$\beta$ - D-xylopyranosyl (1$\rightarrow$3)] -$\beta$- D- fucopyranoside (1) and 26-0-$\beta$-D-glucopyranosyI25(S)-22-0-methyl-furost-5-en-l$\beta$, 3$\beta$, 26-trioll-0-fJ -D¬glucopyranosyl (1$\rightarrow$2)- [$\beta$- D-xylopyranosyl (1$\rightarrow$3)] - $\beta$- D- fucopyranoside (2), respectively.

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Pharmacognostic Evaluation of Curcuma aeurigenosa Roxb.

  • Srivastava, Sharad;Nitin, Chitranshi;Srivastava, Sanjay;Dan, Mathew;Rawat, A.K.S.;Pushpangadan, Palpu
    • Natural Product Sciences
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    • 제12권3호
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    • pp.162-165
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    • 2006
  • Curcuma aeruginosa Roxb. (FamilyZingeberaceae), commonly known as 'pink and blue giner' is widely used in Indian system of medicine since time immemorial. The plant is found well in wild habitat and cultivated in southern India. The plant is distinguished by red corolla lobes and ferruginous or greenish-blue rhizome. Rhizoma is used medicinally as anti-diarrheal, anti-fungal; external use as astringent for wounds. A detailed pharmacognostic evaluation of its rhizome showed total ash 6.1%, acid insoluble ash 1.20%, alcohol soluble extractives 3.70% , water soluble extractives 14.50%, sugar 20.93%, starch 41.85%, and tannins 0.68%. Oh hydro distillation, the rhizomes and sessile tubers yielded 0.17% oil.

섬초오의 Diterpene Alkaloid (Diterpene Alkaloid from Aconitum napiforme)

  • 김영호;황방연;김항섭;이성우;이형규;이정준
    • 생약학회지
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    • 제25권4호통권99호
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    • pp.395-398
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    • 1994
  • A diterpene alkaloid in addition to hypaconitine and mesaconitine was isolated from the tubers of Aconitum napiforme (Ranunculaceae), which is an indigenous plant in Korea. Its structure was elucidated as 8-methoxy 14-benzoyl hypaconine by Physicochemical and spectroscopic data. This compound was isolated from this plant for the first time.

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Two Species of Penicillium Associated with Blue Mold of Yam in Korea

  • Kim, Won-Ki;Hwang, Yong-Soo;Yu, Seung-Hun
    • Mycobiology
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    • 제36권4호
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    • pp.217-221
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    • 2008
  • During 2007 survey of post-harvest diseases of yam performed in May and June, severe tuber loss caused by blue mold was observed in Iksan, Cheonbuk Province. Two species of Penicillium were isolated from the infected tubers. Based on $\beta$-tubulin gene sequence analysis, and cultural and morphological characteristics, the isolates were identified as Penicillium sclerotigenum and P. polonicum. P. sclerotigenum, which is a novel to Korea, is presently described and illustrated.