• Landscaping Tree
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• v.80 no.5_6
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• pp.14-16
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• 2004

부처꽃 하면 초여름에 곧게 뻗은 빨간 꽃차례도 아름답지만 자생화 중 가장 수명이 긴 화종이라는게 생각난다. 몇 년 전 우리 자생화들의 종자수명을 알아보고자 냉장고에서 보관 중이던 약 50종의 종자를 당년산부터 최장 12년산까지 뿌려 발아력을 조사한 적이 있는데, 당시 부처꽃만 100% 가까이 발아되어 정말 수명이 긴 종류구나 하는 것을 느꼈던 기억이 난다. (중략)

• Journal of Korean Society of Forest Science
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• v.97 no.6
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• pp.576-581
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• 2008

The germination responses of Fraxinus rhynchophylla seeds collected from four provenances to constant temperature were investigated over the range $5{\sim}35^{\circ}C$. Difference among seeds in percentage and rate of germination and cardinal temperatures was observed. The seeds from Inje had high germination percentage at low temperature ($5{\sim}15^{\circ}C$) whereas those from Gangneung had high germination percentage at high temperature ($30{\sim}35^{\circ}C$). Three cardinal temperatures viz., the base ($T_b$), the maximum ($T_m$) and the optimum ($T_o$) for germination percentage and germination rate varied among four provenances. $T_b$, $T_m$ and $T_o$ for F. rhynchophylla seed germination as estimated by the quadratic models were the lowest in Inje while those were the highest in Gangneung. The cardinal temperatures ($T_b$, $T_m$ and $T_o$) were estimated by linear sub- and supra-optimal models for germination rate as a function of temperature response. $T_b$ was the lowest in Hoengseong while that was the highest in Gangneung. $T_m$ and $T_o$ were the lowest in Inje while those were also the highest in Gangneung. That is, the seeds from the provenance where the annual mean temperature was high had the higher cardinal temperatures ($T_b$, $T_m$ and $T_o$) as compared to seeds from the provenance where the annual mean temperature was low.

• Korean Journal of Weed Science
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• v.31 no.1
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• pp.78-83
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• 2011

This study was conducted to evaluate germination rate of Vicia tetrasperma and V. hirsuta as affected by storage duration, temperature, and light. All seeds of both species were gathered from Dangjin, Chungnam in the late June of 2004 and 2005, stored for a certain period of time, and then exposed for 20 days to the alternating temperatures ($15/^{\circ}C,\;20/10^{\circ}C,\;25/15^{\circ}C$, and $30/20^{\circ}C$) for evaluating the germination rate. Both 2004 and 2005, two species stored at room temperature for 3 months had germination rates less then 30% with applying various alternating temperatures for 20 days although the highest germination rate was obtained with $25/15^{\circ}C$ treatment. V. tetrasperma at 12 month storage after seed gathering in 2005 had 82% of germination rate with $25/15^{\circ}C$ treatment and showed the increased rate as time passed. V. hirsuta at 6, 9, and 12 month storage after seed gathering in 2005 ranged, however, from 33 to 53% of the germination rate at alternating temperature treatments for 20 days and did not seem to be affected by the elapsed time of the storage. Storage at room temperature was more effective for increasing germination rate of both species compared to those of the storage at low temperature. The germination rate of both species was not significantly affected by either exposure of light or short period of high temperature.

• Journal of Korean Society of Forest Science
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• v.112 no.3
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• pp.352-362
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• 2023

Harvest time is one of the most important determining factors of seed quality, especially for species that produce seeds over irregular and long-term periods, such as Larix kaempferi. A cone collection plan must be established to increase seed production efficiency and stable mass production. We investigated seed qualities such as seed efficiency, germination rate, and T₅₀ (germination speed), with 7 or 8 cone collection times at a clonal seed orchard of L. kaempferi in Chungju between 2021 and 2022. A multivariate analysis was then performed for the collected data. In early August, decreases in the moisture contents and browning of cones were observed. These were followed by a decrease in germination rate, with a peak at the end of September, but no clear trend was observed. The later the cones were harvested, the better the seed vigor (T₅₀). However, the seed yield and efficiency decreased owing to increases in seed scattering and the number of insect-damaged seeds. As a result, the optimal time of seed harvest for the seed orchard was in early August. To produce uniform seedlings, insect damage must be reduced through timely control and harvest cones in early September. This shows that the degree of browning and moisture content of cones can be used as indicators of the timing of cone collection in L. kaempferi seed orchards.

• Research in Plant Disease
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• v.13 no.3
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• pp.157-163
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• 2007

Hot water treatment that is the most appropriate seed disinfection method for organic vegetable farming was evaluated in this study. Among the leafy vegetable seeds lettuce that was the most sensitive to hot water was suitable to treat at $45^{\circ}C$ for 25 min, while Chinese cabbage and radish seeds were optimally treated at $50^{\circ}C$ for 25 min. The treatments resulted in similar or higher seed germination rate than non-treated seeds and promoted plant growth. In addition, fungi such as Alternaria, Aspergillus, Penicillium, or Mucor grown on the seeds were suppressed over 90% and the bacterial growth on lettuce seeds reduced 98.5% by the treatment. Among the fruit vegetable seeds pumpkin that was vulnerable to hot water was suitable to treat at $50^{\circ}C$ for 15 min, while cucumber and hot pepper seeds revealed optimum treatment at $50^{\circ}C$ for 25 min as chinese cabbage and radish. The treatment also showed similar or higher seed germination rate and growth than non-treated seeds. Furthermore, fungi such as Rhizopus, Aspergillus, Penicillium or Mucor grown on the seeds reduced from 72.0% to 95.4%. The bacterial growth on cucumber and red pepper seeds was suppressed from 65.5% to 86.0% by the treatment. Results indicated that the hot water treatment is practical for disinfection of organic vegetable seeds and the optimum temperature and soaking time varied among the seeds.

• Proceedings of the Plant Resources Society of Korea Conference
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• 2001.04a
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• pp.74-76
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• 2001

• Proceedings of the Plant Resources Society of Korea Conference
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• 2001.04a
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• pp.77-79
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• 2001

• Proceedings of the Plant Resources Society of Korea Conference
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• 2002.11b
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• pp.33-34
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• 2002

• Proceedings of the Korean Environmental Sciences Society Conference
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• 2005.05a
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• pp.40-42
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• 2005

• Proceedings of the Plant Resources Society of Korea Conference
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• 1996.09b
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• pp.12-28
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• 1996