• Korean Journal of Plant Resources
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• v.9 no.2
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• pp.189-195
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• 1996

In order to obtain basic information for breeding varieties of onion which is suitable at the southern part of Korea. 222 early mature variety and 219 late mature variety were grown from sep.1993 to jun. 1994 at experimental field of Muan-Gun area, and yield components and yield of onion plant ware observed. Early mature onion cv. Changnyeongchunghwan-gkeukjoseng and Keumjungjoseng showed higher yield than other early mature variety used in the experiment. It showed relatively long plant height and leaf sheath length and, height of bulb and diameter of bulb and high weight of bulb. Late mature onion cv. Chunjudaego showed higher yield than other late mature variety used in the experiment. It showed relatively long plant height and leaf sheath length and diameter of bulb, and high weight of bulb. Therefore, it was concluded that Changnyeongchunghwangkeukjoseng,Keumjungjoseng and Chunjudaego were the most suitable early and late mature varieties with high yield at the southern part of Korea.

• Current Research on Agriculture and Life Sciences
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• v.7
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• pp.11-21
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• 1989

This experiment was conducted at the IRRI experimental fram, Los Banos, Philippines to determine the effects of planting methods on lodging in rice, and to determine plant characteristics that induce lodging. Moderately lodging-susceptible IR36, lodging-susceptible line IR21820-3-2-2-3 and lodging-resistant IR8 and IR64 were tested. Except in IR8, lodging resistance of all test rices was higher when transplanted than when broadcast-seeded. Transplanted rices yielded higher than did broadcast-seeded rices except with broadcast-seeded IR8. Yield reduction due to lodging varied from 0.6 to 1.5 t/ha. Yield components and vegetative characteristics did not differ significantly between planting methods. However, higher culm K content was observed in transplanted rice, and it consequently increased lodging resistance. Phosphorus ans Si contents did not significantly affect culm strength.

• Korean Journal of Organic Agriculture
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• v.11 no.1
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• pp.79-88
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• 2003

Saved labor cost, energy conservation, reduced soil erosion, and increase of emergence rate would be expected from no-tillage cultivation of corn. Few research has been reported on the no-tillage effects for waxy corn hybrid. Five waxy com hybrids were tested under conventional and no-tillage practices to investigate responses of early growth, plant characters, ear characters, fresh yield, and grain yield. Emergence rates under no-tillage were lower than under conventional tillage. Plant heights at early growth stages under no-tillage were higher than those under conventional tillage. Plant height under no-tillage was higher than that under conventional tillage. There were no differences between conventional tillage and no-tillage for ear length, number of kernel rows, number of kernels per row, 100 kernels weight, fresh yield, and grain yield. This result indicates that no-tillage practice might be recommended for practical method for waxy com production. Days to tasseling and silking, plant height, ear height, ear length, and number of kernels per row were correlated with fresh and grain yields.

• Korean Journal of Plant Tissue Culture
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• v.25 no.5
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• pp.329-333
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• 1998

$\beta$-Glucuronidase (GUS) gene of Escherichia coli was introduced into sweet potato (Ipomoea batatas (L.) Lam.) cells by particle bombardment and expressed in the regenerated plants. Microprojectiles coated with DNA of a binary vector pBI121 carrying CaMV35S promoter-GUS gene fusion and a neomycin phosphotransferase gene as selection marker were bombarded on embryogenic calli which originated from shoot apical meristem-derived callus and transferred to Murashige and Skoog (MS) medium supplemented with 1 mg/L 2,4-dichlorophenoxyacetic acid and 100 mg/L kanamycin. Bombarded calli were subcultured at 4 week intervals for six months. Kanamycin-resistant calli transferred to MS medium supplemented with 0.03 mg/L 2iP, 0.03 mg/L ABA, and 50 mg/L kanamycin gave rise to somatic embryos. Upon transfer to MS basal medium without kanamycin, they developed into plantlets. PCR and northern analyses of six regenerants transplanted to potting soil confirmed that the GUS gene was inserted into the genome of the six regenerated plants. A histochemical assay revealed that the GUS gene was preferentially expressed in the vascular bundle and the epidermal layer of leaf, petiole, and tuberous root.

• KOREAN JOURNAL OF CROP SCIENCE
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• v.34 no.3
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• pp.239-245
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• 1989

This experiment was conducted to study the physiological and ecological responses of agronomic characters related to source and sink relation in rice. Standard deviation and coefficient of variability of agronomic characters by individual tiller were greatly influenced by the lower internodes in the length of internode, flag leaf in the leaf blade, lower leaf blade in the leaf width, and the number and spikelets of secondary rachis branch in panicle. In relation to the parts of source and sink of rice plant and the number of spikelet in panicle, the number of spikelet was significantly correlated with the length and leaf area of second leaf blade, the length of second internode, and culm diameter of third internode. The correlation of the length of panicle with the length of internode and leaf blade was greatly influenced by the length of second leaf blade and second internode. The number of spikelet was increased with increasing the second rachis branch rather than first rachis branch. The content of total inorganic nutrients was greatest at leaf blade followed by leaf sheath and internode, and panicle.

• KOREAN JOURNAL OF CROP SCIENCE
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• v.28 no.3
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• pp.351-357
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• 1983

To study the relationships between soybean seed yield and meteorological elements, the investigation into the important agronomic characters of Bongeui cultivar and climatic factors such as precipitation, rainy days, and temperature from 1970 to 1981 was made. The results obtained were summarized as follows: 1) Coefficients of variabilities for pod-filling rate, seed yield, number of pods per plant, and seed weight were about 38%, 30%, 30%, and 5.5%, respectively. 2) Weather conditions mainly in July and August influenced soybean production. Particularly, high temperature played an important role in soybean yield reduction. 3) Correlation coefficients between maximum, minimum, or average temperature of July (and, in the case of August, maximum temperature only) and yield or seed weight, and between those of August and podfilling rate were significantly negative. 4) Regression equations between average temperature of July or maximum temperature of August and yield were Y=-42.46X +1200.86 and Y=-37.95X + 1210.42, respectively. 5) High temperature during the flowering stage affected soybean seed yield reduction significantly.

• KOREAN JOURNAL OF CROP SCIENCE
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• v.57 no.4
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• pp.384-388
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• 2012

Variation of major characteristics of 140 sweet sorghum germplasm which had been collected from domestic and foreign countries were investigated to study the possibility of bioethanol production in reclamed soil of Korea. Averages of culm length, ear length, the number of nodes, stem diameter, fresh weight yield, and growth duration from seeding to heading were 175 cm, 26 cm, 9, 11.6 mm, 12.1 t/ha, and 96 days, respectively. Sugar content, which has a great effect on bioethanol, ranged from 5.7 to 23.5 Brix (average 14.1 Brix). Sugar contents of selected two varieties were more than 20 Brix. Fresh weight yield ranged from 20 to 50 t/ha (average 12.1 t/ha). Fresh weight yield of selected three varieties were more than 30 t/ha. Culm length showed highly significant positive correlation with the ear length, the number of nodes, stem diameter, fresh weight yield, and growth duration from seeding to heading. The number of node showed highly significant positive correlation with stem diameter and fresh weight yield. Fresh weight yield showed highly significant positive correlation with culm length, the number of nodes, stem diameter, and growth duration from seeding to heading.

• Korean Journal of Weed Science
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• v.8 no.3
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• pp.324-329
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• 1988

This experiment was conducted to find the effect of paclobutrazol application of 12, 18, 24g/10a at 35, 25 and 15 days before heading on the characters related with lodging, growth and yield of paddy rice plants in 1985. Culm lengths were reduced from 7% to 12% by paclobtrazol application of 35, 25 and 15 days before heading. The paclobutrazol caused more short internode, thick well of internode and wide section area of internode than the untreated control. The lodging index were remarkably decreased by paclobutrazol application and also the field lodging of rice plant was not observed. The number of spikelet per panicle was decreased by paclobutrazol application at 35 days before heading and 25, but ripened grain ratio and 1000 grain weight were higher than the untreated control. Paclobutrazol applications increased more from 5% to 8% than untreated control on the grain yield.

• Korean Journal of Medicinal Crop Science
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• v.11 no.2
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• pp.109-114
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• 2003

To determine the optimum N rate m Jeju island for utricle and root production of Achyranthes japonica Nakai, a medicinal plant, the plants were grown at two plant densities $(50\;and\;100\;hills/m^2$, two plants per hill; mall plots) at six N application rates (0, 6, 12, 18, 24, and 30 kg/10a; split plots) in 2001. There was no significant interaction between plant density and N application rate for all measured agronomic characters. Main root length and roots per hill were 5 and 52% greater, respectively, but N content of stover was lower under lower plant density compared to higher plant density. The other characters were not affected by plant density. N application rate did not significantly affect mall stem diameter, spikes per hill, spike length, utricles per spike, mall root length and diameter, and utricle N content. As N rate increased from 0 to 30 kg/10a, SPAD values and stover N content increased linearly from 35.0 to 40.5 and 1.09 to 1.38%, respectively, and plant height, branches per hill, stover, utricle and root dry matter yields, roots per hill, and top N yield increased quadratically. Spikes per hill were increased in a cubic manner with increased N application rates. N application rate for the maximum dry matter yield of utricle and root in A. japonica was estimated to be 21 kg N/10a.

• Journal of Life Science
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• v.20 no.6
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• pp.934-939
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• 2010

We have previously reported recombinant productions of bacteriocins using yeast expression plasmid pAUR123, which contains the alcohol dehydrogenase (ADH) promoter, in Saccharomyces cerevisiae cells and their antibacterial activities. In order to improve the antibacterial activities of bacteriocidal yeast cells, a strong glyceraldehyde phosphate dehydrogenase (GPD) promoter gene of S. cerevisiae was amplified and inserted upstream into bacteriocin genes such as the OR-7, Subpeptin JM4-A or JM4-B gene in the corresponding recombinant yeast plasmid. Yeast cells transformed by the recombinant plasmid containing the GPD promoter represented higher antibacterial activities against both Gram positive B. subtilis and Gram negative E. coli cells compared to those transformed by the corresponding recombinant plasmid containing the ADH promoter. Thus, yeast cells harboring the recombinant plasmid containing the GPD promoter constructed in this study could be applied in the food preservative or animal feed industries.