• 한국환경복원기술학회지
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• 제11권3호
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• pp.62-73
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• 2008

This paper was conducted to acquire the scientific data for the waste landfill greening. The native plant flora was investigated in waste landfill at Nanjido. As a result, total 40 species, 22 families, 32 genus were classified. The dominant species were Robinia pseudoacacia (15%), Populus euramericana (3%), and Populus monilifera (1%), ect. Naive plant of 6 species (Zoysia japonica, Aster koraiensis, Liriope platyphylla, Hemerocallis fulva, Sedum kantschaticum, Indigofera pseudotinctoria) were planted in waste landfill in one species per 1 $m^2$ for greening purpose. After One year planting, the ornamental optimum value was showed in Zoysia japonica, Aster koraiensis, Hemerocallis fulva, Hemerocallis fulva, Sedum kantschaticum. The covering rate after nine months planting was 85% and 80% for Zoysia japonica and Hemerocallis fulva, respectively. While Aster koraiensis(a) 13 %, Liriope platyphylla 8 % and Sedum kantschaticum appeared 22 % were obtained. Aster koraiensis (a) has highest height and Sedum kantschaticum was the shortest plant.

• Journal of Plant Biology
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• 제36권3호
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• pp.251-257
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• 1993

The size variation of the cambial initials and their derivatives, in relation to the increase of girth, in the intact and decapitated stem of Populus euramericana was anatomically studied. In the typical nonstoried cambium of P. euramericana, the cell size of fusiform initials, vessel member, and sieve tube member were gradually increased and thus it reached a maximal state. In the intact plants, the size of the cambial initials and their derivatives was larger then in the decapitated ones. On the other hand, the frequency of anticlinal division of the cambial cells, the rate of the elongation and loss of the daughter initials in the intact plants was higher than in the decapitated ones. The cambium of the intact plants had higher ray compared with that of the decapitated ones. It was interpreted that these results were caused by the decapitation, which could block the supply of certain substances for cell growth such as hormones and metabolites.

• 한국가구학회지
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• 제18권3호
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• pp.243-247
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• 2007

An experiment was conducted to observe the safranine penetration depth in radial directions of Populus tomentiglandulosa. Radial penetration was considered from bark to pith. In radial direction, ray parenchyma and intercellular space were considered for the measurement of safranine penetration depth. It was found that sapwood conducted safranine 24.23% higher in radial direction compared with heartwood. Intercellular space conducted safranine 39.27% higher depth compared with ray parenchyma and the penetration depth was 39.41% higher in sapwood compared to heartwood. During safranine penetration, it formed a curvature in the lumen of ray parenchyma. Initially safranine penetration was found high and decreased gradually.

• 펄프종이기술
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• 제37권5호통권113호
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• pp.25-34
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• 2005

The chemical composition of the differentiating xylem of Populus deltoides M. was investigated and compared with that of sapwood. The cell wall polysaccharides were extracted sequentially from adifferentiating xylem and fractionated with gel chromatography. The sugar composition of each fraction was analyzed with G..C and H.P.L.C. The cell wall of the differentiating xylem is rich with the pectin substance and hemicellulose compared with that of sapwood. The water-extracted polysaccharides from the differentiating xylem were composed mainly of xylose and glucose residues. The sugar composition of some of the fractions in the gel filtration of purified $H_{2}O$ polysaccharide suggest that xyloglucan was extracted with $H_{2}O$ from differentiating xylem. Also, we can supposed that the purified $H_{2}O$ polysaccharide might be xyloglucan from the spectrometric data(IR and NMR) of purified $H_{2}O$ polysaccharide.

• 한국생물공학회:학술대회논문집
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• 한국생물공학회 2005년도 생물공학의 동향(XVII)
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• pp.979-979
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• 2005

• 한국생물공학회:학술대회논문집
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• 한국생물공학회 2005년도 생물공학의 동향(XVII)
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• pp.978-978
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• 2005

• KSBB Journal
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• 제7권2호
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• pp.85-91
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• 1992

Hybrid Poplar(Poplar nigra var. betulifollia X Poplar trichorcarpa)의 잎절편을 목본실물 배양배지에서 배양하면서 기관분화를 위한 배양조건과 분화과정 중 부정아의 분화와 auxib(NAA)과 cytokinin(BA)과의 상호관계에 대해서 연구하여 다음고 같은 결과를 얻었다. 1. Poplar잎절편으로부터 부정아의 분화는 식물호르몬의 조성이 NAA $0.01mg/\ell$, BA$0.2mg/\ell$일 때 배양후 13일정도에서 기부 절단면으로부터 부정아가 효과적으로 유도되었다. 2. RNA와 단백질의 함량은 단부가 기부보다 높았으며 기부가 4일에서 10일까지의 상대적이 수치에서는 단부보다 높았다. 3. RNA와 단백질의 함량은 식물호르몬의 조성이 NAA,$0.01mg/\ell$;BA,$0.2mg/\ell$일 때 배양후 7일정도에서 가장 높았다. 4. 표준 WPM에 조직 절편을 배양하였을 때 기부에서 배양시기가 경과함에 따라 특이한 단백질이 형성 되었다.

• 한국산림과학회지
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• 제87권1호
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• pp.50-56
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• 1998

오존에 약(弱)하거나 저항성(抵抗性)을 가지는 포플러 개체(個體)를 선발(選拔)하기 위해서 36개의 잡종(雜種)포플러 클론을 오존에 노출(露出)시켰다. Open-top chamber를 이용(利用)하여 하루에 6-8시간, 3개월 동안 90-115ppb의 농도(濃度)로 오존을 노출시켰다. 수고(樹高), 직경(直徑), 엽수(葉數), 물질생산량(物質生産量), root/shoot비율(比率), 낙엽률(落葉率), 기공반응(氣孔反應) 조사(調査)하였다. 수고, 직경, 엽수, 물질생산량, root/shoot비율, 기공 conductance는 오존 때문에 감소(減少)하였고, 낙엽률은 증가(增加)하였다. 이 연구에서는 기공 conductance와 물질생산량과의 관계(關係)는 아주 낮게 나타났다. 오존환경(環境)에 대해서 저항성을 갖는 것은 기공(氣孔)의 개폐(開閉)와 항상(恒常) 관계(關係)가 있는 것은 아니라고 사료(思料)되며, 아마도 생화학적(生化學的)이고 생리적(生理的)인 다른 요인(要因)에 대(對)한 연구(硏究)가 포플러 클론이 갖는 저항성을 이해(理解)하는데 도움이 될 것이다.

• Journal of Plant Biotechnology
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• 제31권1호
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• pp.49-53
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• 2004

기공이 잎의 앞뒤 양면에 존재하는 생리ㆍ형태적 특징을 가지고 있는 외래 교잡종인 Peace (Populus koreana ${\times}$ P. trichocarpa)포플러의 효율적인 기내증식법을 개발하고자 액아와 엽육 절편을 이용하여 기내배양을 실시하였다. 몇 종류의 배지 시험을 통해 1/2MS배지를 적정배지로 선정할 수 있었고, 이 배지에 TDZ를 처리하여 multiple shoot 및 adventitious shoot유도 효과를 조사하였다. 절간액아 및 엽육을 절편으로 TDZ의 농도별 처리로 배양 2주 후부터 multiple shoot 및 adventitious shoot가 유도되었으며 절편 및 TDZ처리 농도에 따라 차이를 나타냈다. 액아로부터는 TDZ 처리로 절편당 5-7개의 multiple shoot가 유도된 반면 엽육 절편에서는 2-5개의 adventitious shoot가 유도되었다. 한편 부정아로부터 정상적 인 줄기의 성장에 있어서도 절편에 따른 차이를 나타냈다. 이상의 결과는 저농도의 TDZ의 처리로 peace포플러의 액아 혹은 엽육 절편의 기내배양을 통해 대량증식이 가능함을 보여주는 결과이다.

• Journal of Forest and Environmental Science
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• 제31권2호
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• pp.78-90
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• 2015

Short rotation woody crops belonging to the genera Populus L., Salix L., Pinus L., and Eucalyptus L'Her. have provided broad economic and ecological benefits throughout the world, including afforestation and reforestation along urban to rural gradients. Within the genus Populus, cottonwoods, poplars, aspens, and their hybrids (hereafter referred to as poplars) have been shown to exhibit favorable genotype ${\times}$ environment interactions, especially in the face of changing climates. Similar growth responses have been reported for Pinus, especially with white pine (Pinus strobus L.) in the North Central United States. This has led to current research priorities focused on ecosystem services for both genera. The Millennium Ecosystem Assessment (2005) defines cultural, supporting, provisioning, and regulating ecosystem services. The overarching objective of this paper was to synthesize information about the potential of poplars to provide multiple ecosystem services when grown at sites with varying soil and climate conditions across landscape gradients from urban to rural areas. Specific objectives included: 1) providing background of the United States Forest Service and its Research and Development branch, 2) integrating knowledge of current poplar breeding and development with biomass provisioning and carbon regulating ecosystem services as they relate to changing climates in the North Central United States, and 3) providing a case study illustrating this integration through comparisons of poplar with white pine. Our results were evaluated in the context of climate change mitigation, with specific focus on selection of favorable genotypes for sequestering atmospheric carbon and reducing fossil fuel carbon emissions.