• The Korean Journal of Ecology
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• 제20권4호
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• pp.239-244
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• 1997

Hybrid poplar (Populus trichocarpa $\times$ P. deltoides) clones were fumigated with ozone. Fumigation was applied for 6 to 8 hours each day for approximately 3 months at ozone concentrations of 0.090 to 0.115 ppm using by open-top chambers. Growth and biomass of hybrid poplar seedlings were reduced by ozone exposure. Mean percentage of falling leaves in ozone-treated plant was 6 times higher than that of charcoal-filtered plant. Among physiological responses, rate of photosynthesis, stomatal conductance, transpiration and initial Rubisco activity were significantly lower in seedlings grown in ozone environment compared seedlings grown in charcoal-filtered air. All these physiological results supported that biochemical process to be a key feature to understand reduction in photosynthesis.

• 한국산림과학회지
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• 제105권1호
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• pp.103-107
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• 2016

연구는 수변지에 포플러 단벌기 목재에너지림을 조성한 후 2년생 포플러 클론들의 바이오매스 생산, 질소 및 탄소흡수량을 구명하여 수변지 단벌기 목재에너지림에 적합한 포플러 클론을 선발하는데 그 목적이 있으며, 공시수종은 이태리포플러 Eco28클론, 미류나무 교잡종 97-18클론 및 현사시나무 72-30클론 등의 포플러 3클론이다. 포플러 클론들의 평균 줄기 수는 5.0개로 나타났으며, 이태리포플러 Eco28클론이 5.9개로 가장 많았다. 포플러 클론들의 평균 줄기직경 생장은 23.2 mm로 나타났으며, 미류나무 교잡종 97-18클론이 25.4 mm로 가장 우수하게 나타났다. 포플러 클론별 연평균 바이오매스 생산량은 미류나무 교잡종 97-18클론이 16.1 ton/ha/year, 현사시나무 72-30클론이 12.3 ton/ha/year 그리고 이태리포플러 Eco28클론이 5.4 ton/ha/year로 나타나 미류나무 교잡종 97-18클론이 가장 우수하였다. 포플러 클론들의 평균 질소흡수량은 연간 46.5 kg/ha/year로 나타났으며, 현사시나무 72-30클론이 연간 63.1 kg/ha/year로 가장 높게 나타났다. 평균 탄소흡수량은 연간 5.3 ton/ha/year로 나타났으며, 미류나무 교잡종 97-18클론이 연간 7.7 ton/ha로 가장 높게 나타났다. 이와 같은 결과들을 고려할 때 미류나무 교잡종 97-18클론이 수변지 포플러 목재에너지림에 가장 적합한 포플러 클론이라 판단된다.

• 한국지하수토양환경학회:학술대회논문집
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• 한국지하수토양환경학회 2004년도 총회 및 춘계학술발표회
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• pp.252-254
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• 2004

In the past several years phytoremediation, defined as the use of plants for removing contaminants from media such as soils or water, has attracted a great deal of interest as a potentially useful remediation technology. In this study, we have attempted to asses the effectiveness of phytoremeidation of disel contaminate soils using hybrid poplar species. 3 poplar species had removed disel from soil effectively and toxic effect was also observed over 2500mg/kg disel contaminated soil, which indicating reducing disel removal.

• 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.

• Journal of Plant Biotechnology
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• 제3권3호
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• pp.131-134
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• 2001

In $\lambda$-Zap II vector system, a cDNA library was constructed for the developing secondary xylem mRNA from hybrid poplar, Populus nigra x maximowiczii. A cDNA clone of 1.5 kb in size, pOMTB1.4 encoding a lignin-bispecific O-methyltransferase was screened by plaque hybridization using a probe of 540 bp cDNA amplified by polymerase chain reaction from the cDNA library and identified by nucleotide sequencing. Its nucleotide sequence contains one open reading frame of 366 amino acids. The deduced amino acid sequence in comparison with that of Populus tremuloides showed the differences of 9 amino acids and revealed 85-99% homology among alfalfa, poplar and aspen.

• Journal of Plant Biotechnology
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• 제42권2호
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• pp.93-103
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• 2015

The isolation, cloning, and characterization of an R2R3-MYB transcription factor gene (MtMYB70) from the model legume Medicago truncatula is reported. MtMYB70 consists of a 768-bp coding sequence corresponding to 255 amino acids. Sequence alignment revealed that MtMYB70 cDNA contains conserved R2R3-type MYB domains with highly divergent C terminal regions. MtMYB70 was found to have relatively low sequence homology with known R2R3-MYB genes. Phylogenetic analysis placed the R2R3-MYB domain of MtMYB70 closest to PtMYB1, a known activator of lignin biosynthesis. Overexpression of MtMYB70 under the control of the 35S promoter in transgenic poplar did not cause a significant difference in total lignin content relative to the control, but glucan content was significantly increased in transgenic poplar. Therefore, MtMYB70 might have regulatory role in the biosynthesis of cell wall structural carbohydrates.

• Journal of the Korean Wood Science and Technology
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• 제33권5호통권133호
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• pp.66-75
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• 2005

Soybean-based adhesives have recently been reconsidered as alternatives to petroleum-based adhesives due to the uncertainty of availability of petrochemical products and the increased demand for wood adhesives. This study was conducted to investigate the adhesive properties of alkaline phenolic soy (APS) resin for hybrid poplar flakeboard. The APS resin was formulated by crosslinking an alkaline soy flour hydrolyzate with lab-prepared PF resin in the soy hydrolyzate to PF resin weight ratios of 70/30, 60/40, and 50/50. The APS resins were used to fabricate homogeneous hybrid poplar flakeboards with different resin solid levels (5%, 7%, and 9%), press temperatures (175 and $200^{\circ}C$), and press times of 8 and 10 minutes. The IB, wet MOR, and dimensional stability properties of board improved with increasing press time, press temperature, and PF level in APS resins. Increasing press time can be used to offset poor IB strength associated with a 9% resin solid level and the excessive moisture content in the mat. The following conditions were concluded to meet the requirements of the CSA standard for exterior-grade flakeboard: a 50% PF level, a 5% resin content, a $200^{\circ}C$ press temperature, and an 8 minute press time.

• 임산에너지
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• 제22권2호
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• pp.1-17
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• 2003

포플러는 생장이 빠르고 세대가 짧아 임목육종의 모델 수종으로 이용되어 왔을 뿐만 아니라 다른 어떤 수종보다 임목 육종성과가 많은 수종이다. 국내에서 개발된 신품종 포플러는 도입종으로 이태리포플러(p. eurmericana“I-214”,“I-476”), 이태리포플러 1, 2호(p. euramericana“Eco 28”, p. deltoides “Lux”), 교잡종으로 현사시 1, 2, 3, 4호(P. alba x p. glandulosa No. 1. 2. 3, 4), 양황철나무(P. nigra x P. maximowiczii), 수원포플러(P. koreana x P nigra var. italica) 등이 있으며, 신발육종으로 사시나무가 있다. 신품종으로 개발된 포플러류의 조림 실적은 지금까지 935,162 ha로 그 중 이태리포플러가 745,773ha, 현사시가 184,636 기타 신품종이 4,753ha가 조림되어 국토 녹화뿐만 아니라 농촌 경제에도 기여한 바 크다. 포플러와 관련되어 개발된 기술은 신품종 포플러의 적지판정, 교배가 불가능한 원연종간 교배, 무성증식법 등 수많은 기술을 개발 한 바 있다. 앞으로도 포플러는 용재수 및 가로수, 공원수 등 녹음수로서 뿐만 아니라 쓰레기 매립지 침출수, 축산폐수 등 각종 환경 오염물질 정화수로도 전망이 대단히 밝은 수종이다.

• 한국자원식물학회지
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• 제21권3호
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• pp.204-209
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• 2008

We have cloned an LTP gene (PoLTP1) from poplar (Populus alba ${\times}$ P. tremula var. glandulosa) suspension cells and examined changes in its expression levels in response to various stresses and ABA treatment. The full-length PoLTP1 cDNA clone encodes a polypeptide of 116 amino acids with typical characteristics of LTPs, notably a conserved arrangement of cysteine residues. Southern blot analysis indicate that two or three copies of the PoLTP1 are present in the genome of the investigated hybrid poplar. In addition, northern analysis of samples from soil-grown plants indicate that PoLTP1 is tissue-specifically expressed in the leaves and flowers. The gene is significantly up-regulated by treatment with mannitol, NaCl and ABA, but not by either cold or wounding. These results indicate that PoLTP1 is involved in osmotic stress responses in poplar plants and suspension cells.

• Journal of Forest and Environmental Science
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• 제36권4호
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• pp.259-266
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• 2020

Poplar trees from the Salicaceae family over the years have been utilized for various reasons which include prevention of deforestation as well as phytoremediation. This study aims to determine the optimal pre-treatment and soil conditions required for propagation of poplar cuttings for increased initial adaptability and survival rate. Five poplar clones (Hanan, 110, 107, DN-34, 52-225) were selected for IBA, soil composition treatments on propagation. IBA pre-treatment of cuttings were utilized 0, 10, and 100 mg l-1 concentrations. Soil compositions were amended with TKS-2+perlite 2:1 (v:v) and sandy clay loam mixed with artificial soil. According to the greenhouse results 10 mg l-1 of IBA showed a significant increase in plant height whereas 100 mg l-1 inhibited plant growth except in clone 110. Soil composition severely affected root growth and hence overall growth of the clones. Sandy clay loam soil had poor to stunted growth compared to TKS-2+perlite.