• Korean Journal of Medicinal Crop Science
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• v.24 no.1
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• pp.21-26
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• 2016

Background : Acer pictum is a deciduous tree belonging to the family Aceraceae. This study was conducted to collect basic data on mass propagation techniques by surveying the germination and growth characteristics of A. pictum seeds. Methods and Results : A. pictum seeds were harvested in 2014 on August 19, September 5, September 29 and October 31. The seeds were then sown on the same dates they were harvested. A portion of seeds harvested in August 2014 were stored at low temperatures and subsequently sown on March 11, 2015. The germination rate of A. pictum seeds was highest in seeds that were stored harvested on October 31. Mean germination time (MGT) was shortest and germination velocity (Rs) was fastest in seeds harvested on October 31. Root collar diameter, total root length, and dry weight were also highest from seeds collected October 31. Conclusions : A. pictum seeds harvested on October 31 had highest germination and growth rates compared with seeds harvested on earlier dates. It is expected that these results demonstrating optimum harvesting and sowing dates will be applicable to future seedling production for this tree species.

• Journal of Environmental Science International
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• v.21 no.11
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• pp.1419-1424
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• 2012

Purpose of this study was to evaluate germination characteristics of soil seed bank in rural stream topsoil using seedling emergence method in order to provide data for future ecological restoration of stream utilizing topsoil. There were 24 families, 52 genera, 61 taxa of soil seed bank flora found in topsoil from 6 rural streams. The most frequently found taxa were Compositae (12 taxa) followed by Gramineae (8 taxa), Caryophyllaceae (5 taxa), Cruciferae (4 taxa), Scrophulariaceae, Labiatae, Polygonaceae and Cyperaceae. Plant with the most number of germination was Stellaria aquatica followed by Erigeron annuus, Imperata cylindrica var. koenigii, Poa annua, Cyperus microiria and Veronica undulata. Naturalized plants found were Erigeron annuus, Rumex crispus, Oenothera odorata, Cerastium glomeratum, Bidens frondosa, Erigeron philadelphicus, etc.

• Journal of Environmental Science International
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• v.20 no.4
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• pp.541-549
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• 2011

This experiment was held to identify the germination feature of Papaver radicatum var. pseudoradicatum which has high economical value. Seeds were collected in the Mt. Changbai in China. To eliminate dormancy of the seeds, chilling treatment were carried out in the $5^{\circ}C$ refrigerator. 30 days, 60 days, 90 days, 120 days of chilling treatments were taken. After being Treated, seeds were under 15, 20, $25^{\circ}C$ of temperature and light, dark conditions respectively to see the differences in germination. Within many features, germination ratio of seeds and germination period were investigated. Also, features related to early growth were checked through the closer look into acrospire, growth of cotyledon of young plant. Over 30 days of chilling treatment was all effective. Especially, 120 days of chilling treatment was most effective. The seeds germinated well in the light conditions. 120 days of chilling treatment, $15^{\circ}C$, light conditions were found to be most effective conditions as 54.5% of the seeds germinated. The germination period was 4.29 days. 30 days after germinating, length of the aerial part had been 1.90 cm. But after 45 days, the length grew rapidly to 4.58 cm. Fresh weight of scales plant was also increased dramatically after 45 days. Therefore, transporting the plant 45 days after seeding judged to be good.

• Journal of Forest and Environmental Science
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• v.30 no.1
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• pp.120-125
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• 2014

Halophytes are plants of saline habitats that grow under conditions that may vary in extremes of temperatures (freezing to very hot), water availability (drought to water logging) and salinity (mild to almost saturation). Halophytes may also face sudden micro-environmental variations within their habitats. In this study, we examine some of the factors that determine the ability of seeds of Artemisia fukudo to germinate when conditions are optimal for seedling growth and survival. Germination percentage was the highest at 77.5% when treated in 0% seawater and seedling growth was best in 0% seawater plug cell tray. Physiological quality (chlorophyll contents) and mean germination time were best in the condition in which seeds were treated with 0% seawater (control). Germination performance index in the control group showed the highest value to 3.8. Seedling growth, seedling vigor index in the length of seedling growth andthe relative growth rate were the highest values of 0.76 cm, 1.43, 0.0099, respectively.

• Korean Journal of Plant Resources
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• v.18 no.3
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• pp.410-416
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• 2005

Rhodiola sachalinensis has been used as a traditional medicine in Asia. We were germination in vitro seedling of grow naturally in Chang bai Moutain. And callus induction from leaf segments, treatmented plant regeneration in plant growth regulators (Auxins and cytokinins). We investigated optimal conditions for efficient plant regeneration through callus induction and shoots formation on medium with various kinds of growth regulators. Callus induction and adventitious shoots formation was achieved when cytokinin and auxin combinated to this experiment. Especially, there was the highest callus induction rates when we were used to 1 mg/L kinetin and 2 mg/L NAA $(98\%)$, Adventitious shoots formation wear obtained difference rate when cytokinin alone 1 mg/L BA $(96.6\%)$. And regenerated plantlet was acclimatized and transplanted to the soil, showed $100\%$ survival.

• KOREAN JOURNAL OF CROP SCIENCE
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• v.35 no.1
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• pp.1-9
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• 1990

This experiment was carried out to understand the effect of pre-sowing seed treatment by GA$_3$ and IAA on flowering and characteristics of yield component in peanuts. Peanut seed was treated by soaking in 10, 50, 100ppm of GA$_3$ solution, and 50, 100, 200ppm of IAA solution. Treatments of GA$_3$ and IAA resulted 7-5 days earlier emergence and 11-17days shorter of the flowering date compared with the untreated control. By soaking treatments with IAA in 100ppm and GA$_3$ in 100ppm, accumulated flowers were increased at early growing stage of 30 days after flowering compared with untreated control. By soaking treatments with IAA in 100ppm and GA$_3$ in 100ppm, main stem length, branch length and internode of main stem showed to flourish at investigation from early growing stage to 3 days before harvesting.

• Journal of the Korean Society of Environmental Restoration Technology
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• v.18 no.2
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• pp.105-118
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• 2015

This study was conducted to obtain proper amount of solid swine manure and poultry manure in the beginning phase of Cornus kousa growth by investigating the initial germination, seedling growth increment, dry weight, chlorophyll content change, body nutrient uptake and chemical changes of soil according to the concentration of solid swine manure and poultry manure fertilization. When treated with solid swine manure and poultry manure, seed germination rate was the highest in the control. However germination rate showed a tendency to decrease when treated with high concentration of swine manure and poultry manure. The survey results of the growth increment were all higher than that of the control. At the 1.0% treatment of both swine and poultry manure, the seedling height growth was highest. Poultry manure treatment made higher result than swine manure treatment at each treatment. Dry weight was the highest at the 1.0% treatment by both swine and poultry manure. Dry amount declined sharply at the 2.0% treatment. Poultry manure was higher in weight than swine manure at every treatment. Chlorophyll content was the highest at the 1.0% treatment by both swine and poultry manure, but declined sharply at the 2.0% treatment. The survey content was higer than that of the control. The amount of nutrients absorbed in the seedling body was generally high at the 1.0% treatment of swine manure and poultry manure. For the planting soil of Cornus kousa the higher concentration of swine manure and poultry manure was, the lower pH became. However, nitrogen, got higher. available phosphoric acid, exchangeable K, Na, and Mg got higher.

• Korean Journal of Plant Tissue Culture
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• v.22 no.6
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• pp.351-355
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• 1995

A truncated Polygalacturonase (PG) cDNA was fused in reverse orientation to the CaMV 35S promoter of the binary vector pCA643, and introduced into tomato cells by Agrobaderium - mediated transformation. Transformed cells were selected using kanamycin as select agent then regenerated into plants. After selfed, one transgenic line (T9), was germinated and grown on MS medium containing 1 mg/mL of kanamycin Genomic Southern analysis of a T9 progeny with labelled PG2 cDNA probe showed a single antisense PC fragment as well as the endogenous PG2 gene, suggesting that PC antisense gene was integrated into tomato genome. Northern blot analysis demonstrated that the antisense RNA was produced from the transgene at much tiger level than the endogenous PG2 gene. Polygalacturonase activity analysis of the fruit from transgenic plants demonstrated that the antisense transgene expression caused 4 to 60% reduction of endogenous PG activity.

• KOREAN JOURNAL OF CROP SCIENCE
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• v.39 no.3
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• pp.232-236
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• 1994

The term underground stem is not used correctly as mesocotyle that is the first internode of barley, wheat and rye. Mesocotyle does not elongate and it remain in the seed in case of these crops. The elongated stem is second internode of these crops and not mesocotyle but rhizome or underground stem. The node on which the underground stem is attached is coleoptile node and coleptile is attached here. The objective of this study was to determine if the depth of sowing affect the coleoptile length and plant height. The deeper sowing caused the longer coleoptile length and plant height. Coleoptile length and plant height of 2cm depth of sowing showed significant difference with 6cm and 10cm depth of sowing in barley and wheat. Variation of these two characters were high in rye and corn because these crops were both heterogeneous due to out crossing. All the varieties of 4 crops showed significant correlation between coleoptile length and plant height. Chilbohomil showed highly significant correlation between two characters.

• Korean Journal of Organic Agriculture
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• v.20 no.4
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• pp.589-605
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• 2012

This study was conducted to identify allelopathic effect of Ganghwa domestic Artemisia spp., named Sajabalssuk and Ssajuarissuk, for various receptor plants including clover (Trifolium repens L.), alfalfa (Medicago sativa L.), lawn grass (Zoysia japonica Steud.), dandelion (Taraxacum platycarpum Dahlst.), and dahurianpatrinia (Patrinia scabiosaefolia Fisch. ex Trevir). Receptor plants were treated with the aqueous and essential oil extract of Artemisia plants. In consequence, their allelopathic effects were evaluated by measuring seed germination rates, seedling growth, and dry weights of the receptor plants. The seed germination and seedling growth of the receptor plants were inhibited by all treatments of both aqueous and essential oil extracts of the Artemisia plants, and, in addition, the inhibitory effects were increased according to the higher concentration. Among the donor plants, A. $sp.^*III$ showed most effective allelopathic effect. Comparing the alleopathic effect among the receptor plants, seed germination was most inhibited in lawn grass while inhibitory effect of seedling growth was comparatively higher in dandelion. Although inhibitory effects were comparatively lower, the allelopathic effects of Artemisia plants were identified in clover and alfalfa since the seedling growth of these plants were inhibited more than 70%. Thus, in result, Ganghwa domestic Artemisia spp. could be possibly used for weed control since natural products of the plants showed inhibitory effects on seed germination and seedling growth of various receptor plants.