• KOREAN JOURNAL OF CROP SCIENCE
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• v.48 no.3
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• pp.152-155
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• 2003

Burcucumber (Sicyos angulatus L.), used as a medicinal or rootstock for cucurbitaceous crops have shown high variation in seed maturity and size. This study was carried out to determine the effect of seed maturity and size on seed germination, seedling emergence and growth of burcucumber, Seeds collected from a native site were divided into small, medium and large ones after sorted to mature and immature ones. Their germination, seedling emergence and growth were done in indoor and a green house. Mature seeds showed higher germination and seedling emergence rate than immature ones. Regardless of their maturity, medium. and small seeds showed higher germination rate than large ones. Medium and large seeds, however, had the greatest and the least seedling emergence, respectively. Seedling height, number of true leaves areas of cotyledons and true leaves except hypocotyl length were increased with increased seed size although were not affected by the maturity. Cotyledon, leaf, hypocotyl, root and their total dry weights were greater in large mature seeds than large immature ones while increased with increased seed size in both maturities.

• Korean Journal of Environmental Agriculture
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• v.25 no.4
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• pp.382-385
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• 2006

To know the effect of water treatment sludge (WTS) as a rice seedling culture soil, rice seeds are sown, germinated and grown on the culture soils mixed with different ratios of WTS to sand (100:0, 50:50, 30:70, respectively), and their growth effects was compared to that of control, commercial culture soil. When WTS is used as a culture soil for rice, the length and weight of the top part of rice seedling somewhat decreased than those of control treatment while their root length and weight in all WTS treatments significantly increased. Although phosphorus and potassium uptake of rice seedling in WTS treatments was slightly decreased, WTS treatment showed to develop root growth which is necessary in the seedling stage of all plane. Such a stimulatory effect on root growth of rice seedling was significant in the mixture ratio of 50% WTS to 50% sand.

• Proceedings of the Plant Resources Society of Korea Conference
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• 2018.10a
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• pp.57-57
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• 2018

관상용, 식용 및 약용으로도 이용되는 석죽목 석죽과의 여러해살이풀인 오랑캐장구채는 국내에서는 중부 이북지방의 유용 자생식물로 조경산업에의 이용가치가 크나, 이용성 증대 등을 위한 재배기술은 미흡하다. 지피식물용 재배조건의 구축을 위하여 2017년 7월 31일부터 10월 9일까지 약 10주간 본 연구를 수행하였다. 실험재료로 종자에서 육묘한 유묘를 사용하였으며, 유묘의 소질, 이식조건 및 재배관리에 대한 생육의 영향을 조사하였다. 유묘의 소질로는 162구 트레이에서 cell당 4립씩 파종하여 육묘된 유묘가 초장 및 건물중이 높았고, 특히 4립 파종구는 마디수를 제외한 생육량이 다른 처리구에 비해 유의적으로 큰 차이가 있었다. 경제성을 고려할 때, 상토는 혼합비료(N-P-K) $300-200-200mg{\cdot}L^{-1}$가 첨가된 마사토:피트모스(3:1) 혼용토를 충진한 처리구가 효과적이었다. 또한, 코트비료의 기비처리는 포트당 20알 처리구에서 지하부 생체중이 무거웠으나, 엽면적 등 다른 생육량을 고려할 때 기비하지 않은 처리가 효과적이다. 재배관리에 있어서 차광처리는 습기 등의 환경에 약한 유묘의 특성상 차광하지 않고 배치하는 것이 모든 생육량이 높았다. 이식 후에는 추비처리를 하는 것이 효과적이며, 추비농도는 엽수 등을 고려할 때 $500mg{\cdot}L^{-1}$ hyponex이 적합하였다.

• KOREAN JOURNAL OF CROP SCIENCE
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• v.41 no.1
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• pp.62-67
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• 1996

High density (HD) grains is associated with seedling vigor. Studies were conducted on the relationship of different grain densities and vascular bundle(VB) development and seedling growth. IR58 (indica type) and Unbong 7 (japonica type) were used in this experiment. HD grains had more and bigger VB in the leaf blade and sheath than poor density grain at seedling stage. IR58 had more large VB at the leaf compared with Unbong 7. Higher development of VB in seedling of HD grains can increase transport of assimilate and growth rate. Plant height, leaf number, root growth and dry weight increased with increasing grain density from poor to high. The total area of large VB in the leaf blade and sheath was highly correlated with the dry weight. Higher number and larger area of VB and dry weight can be obtained by using HD grains and these initial advantages can contribute to high yield potential.

• Korean Journal of Optics and Photonics
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• v.32 no.5
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• pp.215-219
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• 2021

Recently a system for nondestructive measurement of seedling plants in real time has been attracting attention as an essential element in fields such as the "smart farm". This study reports the simultaneous measurement of anthocyanin accumulations in leaf tissues in a large number of bok choy, using a hyperspectral imaging system. To measure many seedlings simultaneously, an existing hyperspectral imaging system is modified. In this paper, a total of 96 seedlings are measured: 24 each of 4 cultivars. Using the hyperspectral data-acquisition system, 12 seedlings can be analyzed simultaneously within 3 minutes. The hyperspectral imaging technology proposed in this paper is shown to provide an analytic system comparable to destructive chemical analysis. This hyperspectral imaging technology can be applied to a high-throughput plant-phenotyping system, owing to its capability of measuring a large number of specimens at the same time.

• Journal of Practical Agriculture & Fisheries Research
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• v.16 no.1
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• pp.17-24
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• 2014

The experiment was conducted at the growth chamber to determine germination, seedling growth and fresh weight between the untreated control and iron-coated seeds in germination test of the rice seeds. There was of 95% germination in rice seeds regardless of treatments and days for seedling emergence was relatively 13-14days. Seedling height was 4.9cm of the iron-coated seeds but 0.4cm of the untreated control and there was 6.S roots of seedling in iron-coated seeds and 5.5 roots of seedling in the untreated control, respectively. The fresh weight of seedling was 107mg of the iron-coated seeds and 66mg of the untreated control at 35days after sowing.

• KOREAN JOURNAL OF CROP SCIENCE
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• v.30 no.2
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• pp.184-189
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• 1985

The experiments were carried out to know the effect of methionine (precursor) and l-aminocyclopropane-1-carboxylic acid (ACC, direct precursor) on ethylene evolution in rice plant. Wher rice seedlings and leaves were incubated with various concentrations of methionine and ACC, the amount of ethylene evolution increased, but at high nitrogen levels the ethylene evolution decreased.

• Proceedings of the Plant Resources Society of Korea Conference
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• 2002.11b
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• pp.27-27
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• 2002

식용피(Echinochloa crus-galli var. formosensis Ohwi.) 유묘에 대한 생육저해 정도를 지표로 하여 경북 북부지방에 자생하는 10여종의 야생식물의 부위별 MeOH 추출물을 조사한 결과, 1,000 ppm에서 가죽나무(가지)및 할미꽃(경엽부)은 식용피 유묘의 뿌리의 생육을 약 60∼80% 억제시키는 것으로 나타났다. 식물생장억제활성이 나타난 상기 2종에 대해 각종 크로마토그래피법을 적용하여 활성의 본체를 분리ㆍ정제한 결과, 가죽나무 가지 및 할미꽂 경엽부로부터 500 ppm에서 식용피 유묘 뿌리의 생육을 각각 96%와 73% 억제하는 활성분획들이 획득되었으며, GC/MS 분석을 통해 이들 활성분획으로부터 수종의 식물생장억제활성물질들이 확인되었다.

• Korean Journal of Agricultural and Forest Meteorology
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• v.12 no.3
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• pp.207-216
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• 2010

Individual differences of ozone ($O_3$) resistance for seed production, seed germination and seedling development were examined in this study. Five in each healthy and damaged trees of Pinus thunbergii growing in air polluted area for 12 years were chosen based on visible foliar injury and growth. The cones of P. thunbergii, which were collected from healthy and damaged trees, were analyzed for physical characteristics and seeds from the cones were used to test germination percentage under $O_3$ treatment. The germinated seeds were continuously exposed to $O_3$ treatment and the lipid peroxidation and activities of antioxidative enzymes were determined for both seeds and seedlings. The $O_3$ treatment for seed germination and seedling development were conducted at three conditions: control, 150 ppb and 300 ppb of $O_3$. The non-treated seeds from the damaged trees showed 21.6% lower germination than those from the healthy ones. On the $O_3$ treatment of 300 ppb, seed germination decreased approximately 10% for the healthy trees and 19% for the damaged trees compared to that on the control. The seeds from the healthy trees showed significantly higher activities of superoxide dismutase (SOD), glutathione reductase (GR), and catalase (CAT) than those from the damaged trees. The activities of GR, ascorbate peroxidase (APX), and CAT decreased along with the increasing $O_3$ concentration in two tree grades. Malondialdehyde (MDA) content of seeds was not influenced by $O_3$ treatment for two tree grades. In seedling development, there were no significant differences for length and biomass of needle and root of two tree grades at both the control and 150 ppb of $O_3$. At 300 ppb of $O_3$ treatment, however, the length and biomass of needle and stem decreased for two tree grades but no significant differences was detected in root. The seedlings from the damaged trees were more sensitive to the $O_3$ treatment, showing higher activities of SOD, APX, and CAT and content of MDA compared to those from the healthy tree seedlings. Our results indicate that seed germination and seedling development are vulnerable to increasing $O_3$ concentrations and that attention must be paid to the individual selection of tree species for reforestation.

• 한국양묘협회지
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• s.14
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• pp.40-46
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• 1986