• 한국산림과학회지
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• 제31권1호
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• pp.48-52
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• 1976

잣나무 종자(種子)의 무게, 크기(길이 및 두께) 및 성숙기(成熟期)(올잣과늦잣)가 묘목(苗木)의 초기생장(初期生長)(묘종당년생장(苗種當年生長)에 미치는 영향(影響)을 알기 위(爲)하여 강원대학연습림(江原大學演習林)에서 채취(採取)한 종자(種子)를 재료(材料)로 종자(種子)의 무게, 크기 및 성숙기별(成熟期別)로 비교적(比較的) 균일(均一)한 환경조건하(環境條件下)에서 일년간(一年間) pot재배(栽培)하여 각생장(各生長)(묘목(苗木)의 생중량(生重量, 묘장(苗丈), 묘경(苗徑), 지하부장(地下部長), 자엽수(子葉數), 자엽장(子葉長))을 조사검토(調査檢討)했는바 다음과 같은 결과(結果)를 얻었다. 1. 발아율(發芽率)은 종자(種子)의 무게 및 크기의 차이(差異)에는 영향(影響)을 받지 않으나, 성숙기별(成熟期別)로는 차이(差異)가 있어 늦잣이 올잣보다 높은 발아율(發芽率)을 보이고 있었다. 2. 성숙기별(成熟期別) 영향(影響)은 발아율(發芽率)에 대(對)한 기여율(寄與率) 18.3%였다. 3. 종자(種子)의 무게, 길이 및 두께의 차이(差異)는 묘목(苗木)의 초기(初期) 각생장(各生長)에 크게 영향(影響)을 주어, 무게나 크기가 클수록 각생장(各生長)도 컸다. 특(特)히 종자(種子)의 무게나 길이 및 두께의 차이(差異)는 묘목(苗木)의 생중량(生重量), 묘경(苗徑) 및 자엽장(子葉長)에 대(對)한 영향(影響)이 커서 약(約) 50~90%까지 달(達)하고 있었다. 4. 종자(種子)의 무게나 두께의 차(差)가 종자(種子)의 길이의 차(差)보다 초기생장(初期生長)에 더욱 큰 영향(影響)을 주는 경향(傾向)이었다. 5. 성숙기별(成熟期別)로는 늦잣이 올잣보다 묘목(苗木)의 생중량(生重量), 묘경(苗徑) 및 자엽장(子葉長)에 있어서 우세(優勢)했으나 그 영향(影響)은 크지 못했다.

• 한국약용작물학회지
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• 제15권6호
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• pp.367-370
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• 2007

토양수분함량이 묘삼의 생육특성 및 수량에 미치는 영향을 구명하기 위해 비가림 시설하우스에서 토양수분을 $100{\sim}400$mbar 수준으로 조절하여 시험한 결과는 다음과 같다. 1. 광합성량은 토양수분의 감소에 따라 차차 감소되었는데, 토양수분이 매우 적은 조건에서는 뚜렷이 감소되었다. 2. 광합성량은 $25^{\circ}C$보다 $30^{\circ}C$에서 뚜렷이 감소되었으며, 광포화점은 온도에 따라 차이를 보여 $25^{\circ}C$에서는 약 $600{\mu}mol/m^2/s$로 높았으나 $30^{\circ}C$에서는 약 $300{\mu}mol/m^2/s$로. 낮아졌다. 3. 증산량은 광량이 증가할수록 증가하고 토양수분이 감소할수록 감소되었는데, 토양수분이 많았던 처리에서는 온도에 관계없이 고광조건에서 증산량이 매우 많았으나 $30^{\circ}C$의 고온과 400 mbar의 낮은 토양수분 조건에서는 상대적으로 큰 폭의 감소를 보였다. 4. 엽장, 엽폭, 엽록소함량 및 잎의 수분함량은 토양수분의 감소에 따라 차차 감소되었으며, 고온장해율은 토양수분이 감소될수록 뚜렷이 증가되었다. 5. 총근중, 주당근중 및 본포에 이식이 가능한 묘삼의 수량성은 토양수분의 감소에 따라 뚜렷이 감소되어 묘삼생산에 적합한 토양수분함량은 용수량의 63% (절대수분함량 18.9%) 수준이었다.

• Journal of Photoscience
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• 제9권2호
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• pp.391-393
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• 2002

Effects of illumination with xenon or sulfur lamp on growth of tomato seedlings were studied. Results showed no obvious differences in net photosynthetic rate and apparent quantum efficiency. In comparison with xenon lamp, illumination with sulfur lamp slightly reduced ChI a and ChI b content in leaves, relatively shortened epicotyl and hypocotyl length, but significantly increased anthocyanin content of leaves and promoted root growth of tomato seedling plants.

• Journal of Photoscience
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• 제9권2호
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• pp.397-399
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• 2002

The seedling height, leaf width and leaf length of pepper increased in plants grown from seeds irradiated with the low dose of 4 Gy. The $O_2$ evolution in the 4 Gy irradiation group was 1.5 times greater than the control. Pmax was decreased with increasing illumination time by 20% in the control, while hardly decreased in the 4 Gy irradiation group. Fv/Fm was decreased with increasing illumination time by 50% after 4 hours, while Fv/Fm in the 4 Gy irradiation group was decreased by 37% of inhibition, indicating that the low dose $\gamma$ radiation increased resistance of plants to photoinhibition.

• 한국연초학회지
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• 제16권2호
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• pp.102-107
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• 1994

This study was conducted to transfer the potato virus Y-necrosis strain resistance from Nicotiana africana to Nicotiana tabacum (cv. NC82) N. africana was crossed with NC82, GErmination of the cotyledon stage, at which time most of the seedling died. However, surviving seedlings continued to grow normally. Chromosomes of the these interspecific self-sterile F1 hybrids were doubled by tissue culture. Amphidiploid of F1 hybrid was self-fertile. Starting with amphidipliod, a wystematic backcross (BC) program was set up with NC82 as recurrent parent. In the BC5C2 generation, the resistant plant was selected. This resistant line, KF8833-1, had 48 chromosome and secreting glandular trichomes. It flowered 2days later than NC82, and stalk height, leaves per plant, leaf length and leaf width were similar to those of NC82.

• The Plant Pathology Journal
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• 제27권2호
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• pp.110-115
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• 2011

Aggressiveness was studied in seven Plasmopara halstedii (sunflower downy mildew) pathotypes: 100, 300, 304, 314, 704, 710 and 714. Aggressiveness criteria including percentage infection, latent period, sporulation density and reduction of hypocotyl length (dwarfing) were analysed in one sunflower inbred line showing a high level of quantitative resistance. Genetic relationships were detected between the seven pathotypes using 12 EST-derived markers. Pathotypes 100, 300, 304 and 314 were characterized with shorter latent period and higher sporulation density than pathotypes 710, 704 and 714. All pathotypes showed high percentage infection values and caused a large reduction in seedling size except for pathotype 314 involved in dwarfing. Pathotypes 714, 704 and 314 had an intermediary genetic position between the pathotypes 100 and 710. No correlation was detected between aggressiveness traits and EST genotypes.

• 한국유기농업학회지
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• 제6권1호
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• pp.151-160
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• 1997

Azospirillum sp., photosynthetic bacteria(Rhodopseudomonas sp.) and Pseudomonas sp. were separated and screened from soil and soilless culture, and identificated. The antifungal activities against root-infected pathogens and plant growth promoting effects of the cultured solution of the starins(5.0$\times$105 cells/$m\ell$) in the peatmoss compost on the early growth of cucumber and tomato seedling were investigated. Azospirillum sp. and Pseudomonas sp. showed a antifungal activities against Fusarium sp., Pythium sp. and Rhizoctonia sp in thed ranges of 51.0% to 72.0% on potato dextrose agar medium, however photosynthetic bacteria had not antifungal activities. When cultured solution of Azospirillum sp., photosynthetic bacterial and Pseudomonas sp. were bacterialized by mixing with peatmoss compost, early growth of cucumber and tomato in terms of plant height, number of leaves, leaf area, root length, fresh anf dry weight of leaf, stem and root were promoted, especially photosynthetic bacteria had a the best plant growth promting activities.

• Plant Resources
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• 제8권2호
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• pp.91-95
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• 2005

In spring, to determine the optimal planting date and plant density of rapeseed in southern areas of Korea. $Taiwan^{\#1}$ variety for spring sowing, the highest yielding variety was grown under five different planting date and plant density. Yield components such as plant height, ear length, number of seedling stand per $m^2$, number of per ear and seed set percentage were highest at the plots with Mar. 5 of planting date and 50/20cm drilling of plant density. Yield of seed, oil, gas and 1,000 grains weight and erucic acid content were highest at the Mar. 5 of planting date and 50/20cm drilling of plant density. Judging from the results reported above, at optimum planting date and plant density of rapeseed seemed too be Mar. 5 of planting date and 50/20cm plant density in spring sowing.

• 한국환경과학회지
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• 제27권10호
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• pp.821-829
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• 2018

This study was conducted to examine the influence of Light-Emitting Diode (LED) light quality in urban agricultural plant factories on the growth and development of Seolhyang strawberry daughter plants in order to improve the efficiency of daughter plant growth and urban agriculture. LED light quality by demonstrated that above-ground growth and development were greatest for daughter plant 2. Daughter plant 1 showed the next highest growth and development, followed by daughter plant 3. Among the different qualities of LED light, the stem was thickest and growth rate of leaves was highest for R + B III (LED quality: red 660 nm + blue 450 nm/photosynthetic photon flux density (PPFD): $241-243{\mu}mol{\cdot}m^{-2}{\cdot}s^{-1}$) and lowest for R (red $660nm/115-117{\mu}mol{\cdot}m^{-2}{\cdot}s^{-1}$). Plant height, leaf width, petiole length, and the leaf growth rate were highest for W (white fluorescent lamp/$241-243{\mu}mol{\cdot}m^{-2}{\cdot}s^{-1}$) and lowest for R + B I (red 660nm+blue 450nm/$80-82{\mu}mol{\cdot}m^{-2}{\cdot}s^{-1}$). For above-ground growth and development, as the plants surpassed the seedling age, mixed light (red + blue), rather than monochromatic light (red or blue), and higher PPFD values tended to increase development. Regarding the quality of the LED light, daughter plant 2 showed the highest chlorophyll content, followed by daughter plant 1, and daughter plant 3 showed the least chlorophyll content. When the wavelength was monochromatic, chlorophyll content increased, compared to that when PPFD values were increased. Mixed light vitality was highest in daughter plant 2, followed by 1, and 3, showed increased photosynthesis when PPFD values were high with mixed light, in contrast to the results observed for chlorophyll content.

• 한국식물병리학회:학술대회논문집
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• 한국식물병리학회 2003년도 정기총회 및 추계학술발표회
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• pp.89.1-89
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• 2003

Disease suppression by ectomycorrhizal(ECM) fungi has been demonstrated on red pine seedlings. Culturing of pathogenic fungi on petri plates containing culture filtrates of ECM fungi showed that culture filtrates of the ECM fungus Hebeloma cylindrosporum may inhibit the mycelial growth of all tested soil-borne plant pathogenic(SBPP) fungi upto 60％, In order to examine the effects of ECM fungi on SBPP fungi and on red pine seedlings, both symbiotic and pathogenic fungi were inoculated into the soil with red pine seedlings by three inoculation methods; pre-inoculation of SBPP fungi 10 days before inoculation of ECM fungi, simultaneous inoculation of both fungi, post-inoculation of SBPP fungi 60 days after inoculation of ECM fungi. Seedling mortality, seedling growth, and ectomycorrhizal formation by the combined treatments were examined and compared. Pine seedlings were dead by the pre-inoculation of pathogenic fungi, except Rhizina undulate which required 9-12 days, within 6 days after inoculation. Among pathogenic fungi tested, Fusarium oxysporum was the most pathogenic with the mortality of 44％. However, no dead seedlings were shown by simultaneous inoculation of both fungi or pre-inoculation of ECM fungi. In addition, pine seedlings treated by simultaneous or post-inoculation of SBPP fungi were relatively higher than those treated by pre-inoculation in diameter at root crown and the number of ectomycorrhizal roots. There were no significant differences among inoculation methods in root length and dry weight of treated seedlings. It means that ECM fungi somehow play a role in protecting primary roots of red pine seedlings against invasion by the SBPP fungi.