• 한국광과학회:학술대회논문집
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• 한국광과학회 2003년도 학술대회지
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• pp.97-103
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• 2003

Phytochrome controls diverse aspects of plant development in response to the ambient light conditions. HFRl, a basic helix-loop-helix protein, is required for a subset of phytochrome A (phy A)-mediated photo-responses in Arabidopsis. Here, we show that overexpression of HFR1-N105, but not the one of the full-length HFR1, confers exaggerated photo-responses. The transgenic plants overexpressing HFR1- N105 exhibited light-independence in a subset of photo-responses, including germination, de-etiolation, gravitropic hypocotyl growth, and blocking of greening. Overexpression of HFR1-N105 also caused constitutive light-responses in the expression of some light-regulated genes. In addition, the HFR1-N105 overexpressor showed hypersensitive responses under R and FR light, dependently on phyB and phyA, respectively. End-of-day far-red light response and petiole elongation were suppressed in the HFR1-N105 overexpressor plants. Together these results imply that overexpression of HFR1-N105 activated a branch of light signaling, supporting the hypothesis that transcriptional regulation in the nucleus would be the primary mechanism of light signaling in Arabidopsis. We discuss the biotechnological potential of the mutant bHLH protein, HFR1-N105 in regard to suppressed shade avoidance syndrome.

• 식물병연구
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• 제8권1호
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• pp.45-49
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• 2002

딸기탄저병의 발병특성은 정식 직후 격발하다가 시간이 지날수록 발병율이 감소하였으며, 11월 이후에는 발병이 감소하였다. 정식 직후에는 주로 런너로 침입하였으나 엽병 제거 후는 제거한 상처부위로 주로 침입을 하였다. 식물체의 부위별로는 런너에서 가장 강한 병원력을 보였으며 접종방법별로는 생장점 부위로 관주를 할 경우 가장 발병율이 높았다. 딸기탄저병에 의해 고사된 포기를 제거한 자리에 건전한 포기를 심었을 경우 옮겨 심은 포기에서는 발병이 되지 않았다.

• 한국식물병리학회지
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• 제14권6호
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• pp.654-660
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• 1998

Colletotrichum gloeosporioides and Glomerella cingulata are the most important pathogens causing anthracnose which may reduce the stand rate and yield on wide kinds of plants including strawberry. Average occurrence rate of anthracnose is 36.9% on major strawberry cropping areas in Korea. We newly found that C. gloeosporioides which does not forming a sexual stage, infects strawberry and differs in some characteristics concerning virulence, cultural and morphological properties to G. cingulata which has a sexual stage. C. gloeosporioides was mainly isolated from the crown with 35.2% rate, while G. cingulata was largely isolated from petiole, runner with 40.9% rate in infected strawberry plants. These two pathogens showed significant differences in cultural characteristics such as perfect stage formation, temperature response as well as benomyl resistance. It was demonstrated that C. gloeosporioides has significantly stronger pathogenicity than G. cingulata in pathogenicity test carried on strawberry plants to various strawberry cultivars. Akihime, Akaneko and Nyoho forcing cultured strawberry cultivars, considered to be susceptible, while semiforcing cultured cultivars, such as Suhong and Holowase, were shown resistant to both pathogens. In non-wound inoculation, C. gloeosporioides was shown pathogenicity on the apple fruit, but G. cingulata could not infect it.

• Plant Biotechnology Reports
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• 제2권4호
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• pp.253-258
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• 2008

The cDNA of the touch-induced genes (TCH) of the sweet potato [Ipomoea batatas (L.) Lam.] has been cloned and analyzed. IbTCH1, which exists as at least two-copy genes in the genome of the sweet potato, encodes for 148-amino acid polypeptides, and harbors four conversed $Ca^{2+}-binding$ motif EF-hands. IbTCH1 was shown to be expressed in the flower, leaf, thick pigmented root, and particularly in the white fibrous root, but expressed only weakly in the petiole. IbTCH1 is upregulated upon exposure to environmental stresses, dehydration, and jasmonic acid. Furthermore, IbTCH1 is developmentally regulated in the leaf and root. These results strongly indicate that the gene performs functions in both plant development and in defense/stress-signaling pathways.

• 자연과학논문집
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• 제8권2호
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• pp.147-152
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• 1996

딸기의 3품종을 엽과 엽병으로 배양한 결과 2,4-D + BA 처리에서는 치밀한 캘러스가 유기되었고 이 캘러스로부터 다수의 신초가 분화되었으며 NAA + BA 처리에서는 부숴지기 쉬운 캘러스가 유기되었다. '수홍' 엽조직을 NAA나 2,4-D가 첨가된 배지에서 8개월간 배양하면 212번 primer에서 생산된 RAPD band가 모본 band와는 상이하게 나타났다. '보교'와 '여봉'의 엽에서 유기된 캘러스를 2,4-D가 첨가된 액체배지에 계대배양회수를 달리하여 배양하였을 때 12회 계대배양에서 모본과 상이한 RAPD band가 출현되었다.

• 식물분류학회지
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• 제45권4호
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• pp.299-305
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• 2015

Huperzia lucidula (Michaux) Trevis.의 동북아시아 집단 및 북미 집단을 대상으로 외부형태와 포자형태를 비교한 결과 잎의 형태, 엽연부, 잎에서의 기공의 분포 및 포자의 형태에 있어서 뚜렷히 구분되었다. 따라서, 동북아시아 집단을 북미 지역의 H. lucidula와는 독립된 종 H. asiatica (Ching) B.-Y. Sun and J. Lim으로 분리, 승격하였다. 또한, H. serrata (Thunb.) Trevis.와 동일 종 또는 종내 분류군으로 인식되어 오던 H. javanica (Sw.) C. Yang은 영양엽에서 엽병의 발달 유무, 엽연 거치의 수 그리고 무성아가지의 중앙 열편 모양으로 별개의 종으로 처리하는 견해를 지지하였다.

• 식물분류학회지
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• 제45권4호
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• pp.380-390
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• 2015

한국산 마속(Dioscorea L.) 6분류군(마; D. polystachya, 참마; D. japonica, 부채마; D. nipponica, 단풍마; D. quinqueloba, 각시마; D. tenuipes, 도꼬로마; D. dokoro)을 대상으로 외부형태학적 형질을 관찰하였다. 지하부의 유형, 주아의 형성 유무 등이 마절(Enanatiophyllum)과 부채마절(Stenophora)을 구분하는 유용한 형질로 관찰되었으며, 엽병 기부의 돌기 유무, 꽃의 형태 및 색, 열매의 형태, 종자 날개의 형태 등을 비롯한 약의 위치 와 암술 형태와 같은 미세구조적 형질 등이 종을 식별하는 중요한 형질로 판단되었다. 또한 상기 식별형질을 바탕으로 검색표를 제시하였고, 한반도 내 마속 식물의 분포를 확인하였다.

• Journal of Plant Biology
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• 제22권1_2호
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• pp.21-27
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• 1979

Sandy loam plots of pH 5.5, which was created by the reclamation of highlands in Yongin county, Kyeonggi province, was selected for the present experimental study. Sugar beet was cultured in these plots by treating them with calcium hydroxide and 3 replications to maintain pH 5.5, 6.4, 6.8, 7.2, and 7.6, respectively. The growth and yield of sugar beet were investigated and the results obtained showed a great deal of boron deficiency. The growth in its early stage was favorable in high pH plots, while no significant difference was observed in sugar content, root weight and sugar production at the time of harvest in each treated plot. The tendency of sugar accumulation appeared to be identical in terms of pattern in each treated plot; i.e. sugar was accumulated until early September but declined momentarily from the middle of September and then the sugar accumulation was resumed from the middle of October. The number of individuals in boron deficiency was larger in high pH plots and the condition of such boron deficiency was also severe. The result of analysis of boron contained in plant body revealed that the boron content of individuals caused boron deficiency by water culture and that occurred in the plots was small alike. The appearance of boron deficiency is characterized by the emergence of black stripes on the surface of the basal part of petiole, severe necrosis of young leaves in the area of growing point and severe wrinkles. Therefore it is felt necessary to pay particular attention to boron deficiency in the culture of sugar beet in our country.

• Plant Resources
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• 제6권3호
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• pp.183-187
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• 2003

Two kinds of Angelica belong to Umbelliferae collected, the one is Angelica gigas that is inhabitant in Korea and the other is Angelica acutiloba that is indigenous in Japan at the field of Snyder Research and Extension Farm Rutgers University, New Jersey and was analyszed by GC and GC/MS. The composition of the essential oil of the different aerial parts of the Angelica has been studied. The oil yields obtained upon hydrodistillation were 0.18% (v/w) in Korean Angelica and 0.44% (v/w) in Japanese Angelica on dry root weight basis. By the growing stage in the Rutgers greenhouse condition, leaf and root of essential oil content a little decreased on 9 months later than 4 months later except for Angelica gigas leaf. Both of Angelica showed that amounts of essential oil content presented in order of leaf > petiole > root according to different plant part. The analysis of the essential oil from Angelica root led to the identification of 14 constituents totaling 64% in Korean Angelica and 13 constituents totaling 68% in Japanese Angelica. The major constituents of the Angelica root essential oil were ligustilide (47 %) and gamma terpi (14 %) in Korean Angelica, and alpha pinei (32 %) and nonane (25 %) in Japanese Angelica

• Journal of Ginseng Research
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• 제4권1호
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• pp.49-54
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• 1980

This investigation were carrion out to know the frequency, size and distribution of stomata in Korean ginseng, acanthopanax and codonopsis. The results are as follows; 1. Stomatal frequency in ginseng leaf was remarkably less than those of acanthopanax and codonopsis leaf, but size of stomata in ginseng leaf was larger than those of acanthopanax and codonopsis leaf. 2. Stomatal frequency of one year old ginseng plant was higher than those of the older. Two to five years old ginseng plants were not differed in frequency and size of stomata. 3. Frequency and size of stomata were higher and larger in red-berry variant in compare to yellow-berry variant. 4. Stomatal frequency in different leaf Position was not significantly different among those of middle leaf, first side leaf and second side leaf, but in decreasing order of middle Part, upper, lower part and edge in the same ginseng leaf. 5. Stomata was not seen in adaxial surface and petiole of leaf ginseng, acanthopanax and codonopsis. 6. Stomatal frequency was higher in ginseng plant grown under no$.$shading compared to shading, and that of ginseng plant in rear line was less than that of front line under the same shade roof.