• 한국자원식물학회지
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• 제9권3호
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• pp.279-284
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• 1996

청양재래와 유성 2호 2품종을 공시하여 원줄기를 10cm로 고정시키고, 구기순 채취길이를 20cm, 30cm, 40cm로 달리 하였을 때 구기자나무의 생육적 특성 및 구기순의 수량을 알아봄으로써 구기순 재배에 필요한 기초 자료를 얻고자 수행한 시험 결과를 요약하면 다음과 같다. 1. 유성2호가 청양재래에 비해 구기순 수, 구기순당 엽수, 주당 총엽수, 수확횟수는 많았고 구기순의 굵기는 굵었으나 엽장, 엽폭은 작았다. 2. 청양재래의 구기순 채취횟수는 4.5회이었으나 유성2호는 5.5회로서 청양재래보다 1회 더 채취할 수 있었다. 3. 구기순의 건물중은 $1.01{\sim}1.03g$이었고, 줄기 : 엽비율은 46 : 54로 엽비율이 8% 높았다. 4. 구기순의 수량은 청양재래가 $108{\sim}204kg/10a$이고 유성 2호는 $215{\sim}383kg/10a$ 이었으며, 유성 2호는 년차간의 수량 증감폭이 적어 재식 당년의 수량을 기대할 수 있었다. 5. 청양재래의 구기순 수를 제외한 공시품종의 각 생육형질은 수량과 고도의 정(正)의 상관적이었으며, 유성 2호의 구기순 수는 주당 총엽수를 제외한 각 생육형질 및 수량과 부(負)의 상관이 있었다.

• Journal of Microbiology and Biotechnology
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• 제17권11호
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• pp.1805-1810
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• 2007

Purple nonsulfur bacteria were isolated from river sediments and their growth promoting capabilities on tomato were examined. Isolated strains KL9 and BL6 were identified as Rhodopseudomonas spp. by 16S rDNA sequence analysis. Rhodopseudomonas strain KL9 maximally produced 5.56 mM/min/mg protein and $67.2\;{\mu}M/min/mg$ protein of indole-3-acetic acid (IAA) and 5-aminolevulinic acid (ALA), respectively, which may be one of the mechanisms of plant growth enhancement. The germination percentage of tomato seed, total length, and dry mass of germinated tomato seedling increased by 30.2%, 71.1%, and 270.8%, respectively, compared with those of the uninoculated control 7 days after inoculation of strain KL9. The lengths of the root and shoot of germinated seedling treated with 3 mM tryptophan, a precursor of IAA, increased by 104.4% and 156.5%, respectively, 7 days after inoculation of strain KL9. Rhodopseudomonas KL9 increased 123.5% and 54% of the root and shoot lengths of germinated seedling, respectively, treated with 15 mM glycine and succinate, precursors of ALA. This plant growth promoting capability of purple nonsulfur bacteria may be a candidate for a biofertilizer in agriculture.

• 생태와환경
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• 제53권3호
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• pp.295-303
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• 2020

We investigated the growth response and population regeneration of four halophyte species: Suaeda japonica, Salicornia europaea, Suaeda maritima and Suaeda glauca, when climate change proceeds caused by increased CO₂ concentration and temperature. The plants collected from habitat in 2018 were transplanted into Wagner pots, and cultivated for two years in greenhouse divided into a control (ambient condition) and a treatment (elevated CO₂+elevated temperature). The shoot length of halophytes was measured in July of each year, and the population regeneration rate was measured in October 2019. The shoot lengths of S. japonica and S. glauca had no difference between control and treatment for two years. Those of S. europaea were longer in control than treatment for two years. Those of S. maritima had no difference between control and treatment in 2018 but were longer in control than treatment in 2019. In control, the shoot lengths of S. japonica, S. europaea and S. glauca had no difference between years while those of S. maritima were longer in 2018 than in 2019. In treatment, those of S. japonica, S. europaea and S. maritima were shorter in 2019 than 2018 but S. glauca had no difference between years. The regeneration rates of S. japonica, S. europaea and S. glauca were lower treatment than control, and there was no difference in the regeneration rate of S. maritima. In conclusion, if climate change progresses caused by the increase of CO₂ concentration and temperature, the shoot lengths of S. japonica, S. europaea and S. maritima will be shortened, and the regeneration rate of population will be increased only in the S. maritima.

• 한국토양동물학회지
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• 제8권1_2호
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• pp.23-26
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• 2003

고구마뿌리혹선충(Meloidogyne incognita)에 대하여 멀구슬나무(Azadirachta indica) 부산물인 Suneem-G와 요소의 억제효과를 연구하였다. 폿트 당 살균토양을 2kg씩 넣고 M. incognita 2령기 유충 2,000마리를 접종한 후 오크라를 심고 Suneem-G를 처리하였다. Suneem-G의 처리량에 따라 유충 밀도 및 형성은 유의성 있게 차이가 있었고, Suneem-G와 요소를 동시에 처리하였을 때 그 효과는 상승하였으며, 선충 밀도가 낮을수록 오크라 식물체의 생장이 좋았다. 요소와 Suneem-G를 함께 처리한 조합에서 가장 높은 효과를 보였으며, 처리량의 증가에 따라 억제 효과도 증가하였다. 폿트 당 Sueem-G 6g과 요소 25g 조합의 처리에서 최대의 식물생육과 뿌리혹의 최대감소를 보였는데, 식물체 엽육과 뿌리의 길이가 84%와 58%나 높았으며, 뿌리혹은 58%나 감소하였다. Suneem-G의 최저 처리인 폿트 당 2g 처리에서 식물체의 엽육과 뿌리의 길이는 25.7과 17%까지 증가하였으며, 뿌리혹은 24% 감소하였다. 그러나, 요소 25g 처리에서 가장 낮은 효과를 나타내었으며, 식물의 엽육과 뿌리의 길이는 증가하였으며 뿌리혹은 14% 감소하였다.

• Journal of Ginseng Research
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• 제31권1호
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• pp.14-22
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• 2007

As the zygotic embryo of North American ginseng (Panax quinquefolius L.) matured during stratification over 203 days it grew from 0.75 to 5.2 mm. Embryo excision and culturing on media containing different concentrations of two growth regulators, gibberellic acid ($GA_3$, 1 to 10 ${\mu}M$) and benzyladenine (BA, 1 to 5 ${\mu}M$), during stratification, showed that shoot and root number and the shoot, root and cotyledon length increased with increased stratification time. Gibberellic acid was the more effective growth regulator for increasing shoot and root number and shoot, root and cotyledon lengths. Immature embryos (stratified for up to 63 days) needed growth regulators for further development. Cultures on $GA_3$ at the last culture date (stratified for 203 days) when embryos were mature, produced multiple shoots but there was no effect of $GA_3$ concentration. Benzyladenine inhibited shoot and root growth regardless of embryo stratification. Growth regulators had little effect on cotyledon length of mature embryos. Embryos cultured on $GA_3$ combined with BA were green on all culture dates whereas greening in the control and BA treatments increased with culture date. The BA treatments induced 100% swelling of the embryos on the final culture date while in the control and $GA_3$ treatments there was no swelling. There was little or no curling in the control and BA treatments and a linear decrease in curling with culture date in the $GA_3$ and $GA_3$ + BA treatments.

• Preventive Nutrition and Food Science
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• 제15권2호
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• pp.113-119
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• 2010

The aim of this study was to investigate changes in 7 nutritional components (fatty acid, protein, fat, ash, total dietary fiber (TDF), $\gamma$-aminobutyric acid (GABA), and $\gamma$-oryzanol) of paddy rice (PR) and brown rice (BR) throughout the germination process, as measured at different shoot lengths (10 mm, 20 mm, and 30 mm). With the increase of shoot length, the nutritional components' concentrations increased, as compared to the concentrations measured before germination. Moreover, BR exhibited higher GABA, $\gamma$-oryzanol, and protein than PR. Among the components, TDF, GABA, and $\gamma$-oryzanol showed significant concentration differences throughout germination, while the others exhibited only slight variations. In particular, GABA and $\gamma$-oryzanol were predominantly increased in grains of 10 mm shoot length. These compounds might prove to be important factors from germinated rice. Additionally, the germinated cultivar 'Keunnun' might also prove to be a very important food source, owing to its high GABA and $\gamma$-oryzanol contents. These results suggest that variations in nutritional components related to the increase of shoot length may prove to be important when considering the beneficial aspects of rice on human health.

• 한국잡초학회지
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• 제12권2호
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• pp.173-182
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• 1992

해바라기의 상대억제작용(相對抑制作用)(타감작용(他感作用), Allelopathy) 및 천연제초제(天然除草劑)로서의 개발가능성(開發可能性)에 관한 시험(試驗)을 1988-1991년(年)에 걸쳐 국제미작연구소(國際米作硏究所) 농학(農學), 생화학부(生化學部) 및 국립(國立)필리핀 대학교(大學校) 화학과(化學科) 천연물(天然物) 연구실(硏究室)에서 수행(遂行)하여 얻은 결과중(結果中) 상대억제작용성(相對抑制作用性) 해바라기 근분비물질(根分泌物質)의 생물검정(生物檢定) 및 상대억제작용물질(相對抑制作用物質)(Allelochemicals)의 HPLC 분석결과(分析結果)는 다음과 같다. 1. 해바라기 근분비물질(根分泌物質)의 산(酸) 및 중성분획물질(中性分劃物質)을 생물검정재료(生物檢定材料)로 사용한 피 (Echinochloa colona (L.) Link 및 무 (Raphanus sativus L.)의 발아(發芽)가 유의성(有意性)있는 억제(抑制)를 보인 반면 알칼리 및 수용성분획(水溶性分劃)에서는 억제작용(抑制作用)이 나타나지 않았다. 2. 피의 경우 해 바라기 근분비물질(根分泌物質)의 분획물질(分劃物質) $10{\mu}l$ 농도(濃度)에서부터 유의적(有意的)인 생장억제(生長抑制)가 인정(認定)되었으며 지상부(地上部) 신장억제(伸張抑制)보다 지하부(地下部) 신장억제(伸張抑制)가 산(酸) 및 중성분획(中性分劃)에서 더 강하게 나타났다. 3 무의 경우 농도(濃度)에 관계없이 지상(地上) 및 지하부(地下部) 신장억제(伸張抑制)가 산(酸) 및 중성분획(中性分劃)에서 각각 높게 나타났다. 4. 생물검정(生物檢定)에서 강한 상대억제작용(相對抑制作用)을 보인 산성분획물질(酸性分劃物質)의 HPLC분석결과(分析結果) hydroquinone, ${\beta}$-resorcyclic acid, vanillic acid, caffeic acid, salicylic acid, quercetin 등의 물질(物質)이 확인(確認)되었다. 한편, 중성분획물질(中性分劃物質)에서는 Hydroquinone, gentisic acid, ${\beta}$-resorcyclic acid, vanillic acid, caffeic acid, ferulic acid, quercetin 등이 각각 동정(同定)되었다.

• 아시안잔디학회지
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• 제13권2호
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• pp.71-78
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• 1999

The influence of increasing livel (0.0, 0.05, 0.1, 0.2, 0.4, 0.6, 0.8, 1.2, 1.6, and 2.0%) fo NaCl on the germination of red fescue (Festuca rubra) 'Sea Breeze', tall fesce(Festucaarundinacea) 'Pixie', creeping red fescue (Festuca rubra ssp. rubra) 'Cindy', annual rye-grass (Lolium multiflorum) 'Permer Ⅱ', perennial ryegrass (Lolium perenne) 'Pennant', fairway wheatgrass(Agropyron cristatum), creeping bentgrass (Agrostis palustris) 'Penncross', and kentucky bluegrass (Poa pratensis) 'Nuglade' was investigated. Red fescue 'Sea Breeze', tall fescue 'Pixie', and creeping red fescue 'Cindy' had greater than 90% seed germination at NaCl concentrations of 0.2% or lower, while showing similar seeding shoot and root lengths and TAA50 values as the control. Creeping red fescue 'Cindy'gave at 0.6% or higher NaCl. Perennial ryegrass 'Pennant' and annual ryegrass 'Permer Ⅱ' showed more than 95% seed germination when NaCl concentrations were 0.4% and 0.8%, respectively. Fairway wheatgrass, creeping bentgrass 'Penncross' and Kentucky bluegrass 'Nugade' had showing similar germination percent, shoot and root lengths and T50 values as the control at NaCl concentrations of 0.1% or lower. In general, germination percent and the lengthes of seedling roots and shoots of all species tested decreased as NaCl concentrations iscreased. The T50 values became greater as NaCl concentration increased. Seed fermination in red fescue 'Sea Breeze', tall fescue 'Pixie',perennial ryegrass 'Pennant', and annual ryegrass 'Permer Ⅱ' was compoetely inhibited at 2.0% NaCl. Creeping red fescue 'Cindy' and fairway wheatgrass gardly germinated at 1.6% MaCl. Creeping bentgrass 'Penncross' and Dentucky bluegrass 'Nuglade' showed a complete inhibition of germination at 1.2% and 0.6% NaCl, respectively.

• 한국해양학회지:바다
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• 제22권4호
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• pp.199-204
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• 2017

독도에 자생하는 잘피의 생태적 특성을 연구하기 위해 2016년 9월 독도해역을 탐색하여 잘피가 출현하는 동도와 서도의 각 1개 정점에서 조사하였다. 조사장소에는 보호대상해양생물인 게바다말이 군락을 이루며 산재하고 있었다. 동도와 서도에 출현하는 게바다말은 각각 평균 잎 수가 4.8개와 4.7개, 잎 폭은 2.0 mm, 개체 길이는 각각 42.5 cm와 41.9 cm로 유사하였다. 동도와 서도의 게바다말 평균 생육밀도는 각각 $3,500{\pm}334.2shoots\;m^{-2}$와 $2,275{\pm}415.1shoots\;m^{-2}$로 유의한 차이는 나타나지 않았다. 독도에 자생하는 게바다말은 주로 소형 군락을 이루고 있었으며 생육밀도는 한반도 동해연안에 출현하는 게바다말과 유사하였다.

• 한국습지학회지
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• 제8권3호
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• pp.39-49
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• 2006

Seasonal biomass and carbon, nitrogen contents change of marsh club-rush (Schoenoplectus trigueter) was investigated in Nakdong river estuary, located near Busan, Korea. New shoot of S. trigueter sprouted from tuber in April and fast growth season was followed until mature in August. Mature lengths of shoot and root were 60 and 9.4 cm, respectively. The increase of biomass showed similar seasonal trends with length. Mature biomass were $3.5gind^{-1}$ in wet weight and $0.6gind^{-1}$ in dry weight. The biomass of S. trigueter in areal basis was also highest during July and August ($186gDWm^{-2}$). The shoot of S. trigueter was disappeared in October from the ground but the biomass of shoot was maintained as a form of detritus in sediment. The amount of S. trigueter detritus was about 30~50% of the biomass in August. During winter, the amount of detritus decreased with time but the biomass of root+tuber remained same, implying the root+tuber part is alive. The net productivity of S. trigueter estimated from biomass change were $538gDWm^{-2}yr^{-1}$, $240g-Cm^{-2}yr^{-1}$, $8.2g-Nm^{-2}yr^{-1}$ in dry weight, carbon and nitrogen equivalent respectively. During winter, carbon to nitrogen ratio in detritus increased implying the preferred remineralization of nitrogen during microbial degradation.