• Title/Summary/Keyword: Bolting Response

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Bolting Response of Various Lettuce Cultivars Affected by Seed Treatments (종자처리에 의한 상추 품종간 추대반응 차이)

  • Hwang, Hyeon-Jeong;Lee, Jung-Myung;An, Jong-Moon;Kim, Se-Young;Choi, Geun-Won
    • Korean Journal of Environmental Agriculture
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    • v.26 no.4
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    • pp.325-331
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    • 2007
  • A series of experiments were performed to evaluate effects of lettuce seed treatment with low temperature and dry heat treatment (DHT) on bolting response in the case of spring cultivation. During spring production in greenhouse, bolting response of the plants produced from the treated seeds was faster in the order of low temperature treatment, control and DHT. Plant height was increased 5-10 cm higher by low temperature treatment, but plant growth of some cultivars was inhibited by DHT. Difference on lettuce plant growth between low temperature treatment and DHT was gradually diminished with the lapse of time after transplanting. Fresh weight of plant was not significantly different among all treatments. 'Red Gyeolku' showed very early bolting response and plant height was significantly promoted by low temperature treatment. However, 'Cheongchima' showed low bolting percentage after various seed treatments, so it is considered late-bolting cultivar.

Plant Growth and Bolting Affected by Transplanting Time in Angelica gigas (참당귀의 정식시기에 따른 생육 및 추대)

  • Yu, Hong-Seob;Jo, Jae-Seong;Park, Chung-Heon;Park, Chun-Geon;Sung, Jung-Sook;Park, Hee-Woon;Seong, Nak-Sul;Jin, Dong Chun
    • Korean Journal of Medicinal Crop Science
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    • v.11 no.5
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    • pp.392-396
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    • 2003
  • This study was carried out to determine plant growth and bolting characteristics of Angelica gigas. Three varieties and/or lines Manchu bolting resistant variety, AGJ90-1 medium type line, and bolting Jinbu local were used for field trial in Suwon. FIve different transplanting times were applied on March 25, April 5, April 15, April 25, and May 5th. Survival rate was decreased by the delayed transplantation and it affected after April 25th respectively. Plant growth by the early transplantation showed the best growth during the beginning stage and recognized signifiquence but not by the late transplantation. Bolting rate revealed severe different by the variety and line, it ranged from $10{\sim}8.1%$ of Manchu, $5.9{\sim}20.3%$ of AGJ90-1, and $58.5{\sim}74.6%$ of Jinbu local clearly. By the treatment of transplantation time bolting rate was different, early plantation showed high bolting rate compare to the late plantation from the all of tested variety and lines. Bolting response according to the transplanting time, bolting resistant variety showed insensibility and boling line showed sensitive response. In Manchu root yield was best when planted on April 5th as 389 kg /10a, in case of AGJ90-1 was determined 377 kg/10a when planted on April 15th, and Jinbu local root yield was showed 133 kg/10a planted on April 25.

Effect of Weight of Crown Part on Growth and Bolting Response in Ostericum koreanum Kitagawa. (노두무게에 따른 북강활의 생육 및 추대반응)

  • Kim, Soo-Yong;Lee, Sang-Seok;Choi, Hyo-Sim;Sohn, Hyoung-Rac;Oh, Sei-Myoung
    • Korean Journal of Medicinal Crop Science
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    • v.17 no.3
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    • pp.161-164
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    • 2009
  • This study was conducted to investigate the weight of crown part effect on growth and bolting response of Ostericum koreanum Kitagawa. Bolting rate with crown part weight was represented 0%, 0%, 4.1%, 12.9%, 25.1%, 34.9% corresponding to each crown part weight 5 g, 10 g, 20 g, 30 g, 40 g, 50 g. The heavier the crown part weight was the higher the direction rate rose and the flowering time came earlier. The dried root amount was the highest at 30 g and crown part number, the length of root, and crown diameter showed all the highest figures at 30 g. The relation between amount per 10 g and outcrop weight increased on secondary regression formula as weight increased and reached its peak at 29.7 g and then decreased over 29.7 g.

Variation of Bolting at Cultivation of Different Regions and Molecular Characterization of FLC homologs in Angelica gigas Nakai (재배 지대에 따른 참당귀의 추대 변이와 FLC 유전자 특성)

  • Kim, Young-Guk;Yeo, Jun-Hwan;An, Tae-Jin;Han, Sin-Hee;Ahn, Young-Sup;Park, Chung-Beom;Jang, Yun-Hee;Kim, Jeong-Kook
    • Korean Journal of Medicinal Crop Science
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    • v.20 no.5
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    • pp.359-364
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    • 2012
  • This study were carried out to find bolting response of cultivation in different regions and to isolate FLC (FLOWERING LOCUS C) homologs in Angelica gigas Nakai. The mean temperature of different regions, ordering in altitude, were as follows: 100 m > 350 m > 530 m > 700 m. The largest amount of rainfall was occurred in the region of 350 m while the longest time of sunshine was occurred in the region of 100 m. The content of soil chemical properties in regions showed pH 6.2 ~ 7.4, T-N 0.17 ~ 26, organic mater $1{\sim}32gkg^{-1}$, $P_2O_5$ ${151{\sim}664_{mgkg}}^{-1}$, exchangeable potassium and calcium and magnesium were 0.78 ~ 1.15, 3.9 ~ 10.0, ${0.7{\sim}3.2_{cmol}}^{+kg-1}$. L5 line of A. gigas was occurred in bolting at all regions, but the bolting ratio was 60.0% in 700 m region with non-mulching treatment. Manchu of A. gigas was not occurred in bolting at all regions. The accumulation bolting ratio of L5 line by non-mulching was higher than that of mulching as 90.4% and 72.8% in 100 m region. The MADS-box transcription factor FLC is one of the well-known examples as a strong floral repressor. We decided to isolate FLC homologs from A. gigas as a starting point of flowering mechanism research of this plant. We have isolated two RT-PCR products which showed very high amino acid sequence homology to Arabidopsis FLC.

Inhibiting Floral Induction of Angelica gigas NAKAI in the Hilly Altitude Area (중.산간지대에서 참당귀의 화성억제 연구)

  • 이승필;조지형;민기군;권태용;최장수;박노권;최부술
    • KOREAN JOURNAL OF CROP SCIENCE
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    • v.40 no.1
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    • pp.1-8
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    • 1995
  • This study was carried out to investigate the effects of floral inhibition of An-gelica gigas NAKAI in the hilly altitude located in the Northern Gyeongbuk Province from Feb. 1992 to Nov. 1994. The results obtained were as follows : As the cultivated areas are high, rate of bolting was significantly decreased, having high yield, good growth, and medicinal quality. It is considered that the optimal cultivating area was at least above 600m altitude. In the hilly altitude, the more shorten nursery period was, the more decreased rate of bolting was, it results in decreased yield, having no significant differences in contents such as extracts and decursin. In bolting response from temperature treatment of the seedlings, treatment of high temperature was significantly decreased floral induction, but rate of establishment was decreased by decayed root. Bolting rate at different organic resources has more reduced in single fertilization than that of in organic application, but among organic resources, compost of rice straw has the lowest bolting rate. As a result, yield and medicinal qualities at various organic resources were increased in application of organic resources which was no con-siderable tendency among organic resources.

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Effects of Nursery Periods on Bolting Response and Yield of Solidago (미역취의 육묘일수가 추대반응과 수량에 미치는 영향)

  • 민기군
    • Korean Journal of Plant Resources
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    • v.10 no.4
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    • pp.382-385
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    • 1997
  • The experiment was carried out to investigate the optimum nursery periods on bolting responses and fresh leaf yield in Solidago virga-aurea. The result were as followings: growth characteristics as affected by nursery periods was promoted at the 60 and 70days without cultural years. Bolting responses by nursery periods of first year was respectively 14.5 and 13.5% in 40 and 50days, but the plant showing bolting reponse was not appeared at the 60 and 70 nursery periods. The highest fresh leaf yield was 60 nursery period as 2,750kg per 10a. The more bolting rate was increased, the more fresh leaf yield was decreased. As a rusult, the optimum nursery period to produce high fresh leaf yield of this crop plant was 60days.

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Studies on Inhibiting Floral Induction of Angelica gigas NAKAI in the Hilly Altitude Area (중.산간지대에서 참당귀의 화성억제에 관한 연구)

  • 이승필
    • Korean Journal of Plant Resources
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    • v.8 no.1
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    • pp.55-62
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    • 1995
  • This study was carried out to investigate the effects of floral inhibition of Angelica gigas NAKAI in the hilly altitude located in the Northern Gyeongbuk Province from Feb. 1992 to 1994. The results obtained were as follows: As the cultivated areas are high, rate of bolting was significantly decreased, having high yield, good growth, and medicinal quality. It is considered that the optimal cultivating area was at least above 600m altitude. In the hilly altitude, the more shorten nursery period was, the more decreased rate of bolting was, it results in decreased yield, having no significant differences in contents such as extract and decursin. In bolting response from temperature treatment of the seedlings, treatment of temperature was significantly decreased floral induction, but rate of establishment was decreased by decayed root. Bolting rate at different organic resources has more reduced in single fertilization than that of in organic application, but among organic resources, compost of rice straw has the lowest bolting rate. As a result, yield and medicinal qualities at various organic resources were increased in application of organic resources which was no considerable tendency among organic resources.

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Dynamic Characteristics of Bolted Joint in Tube Line by External Vibration (외부 가진을 받는 관로계에서 볼트 결합부의 동특성)

  • Park, T.W.;Kim, Y.K.;Shin, G.S.
    • Journal of Power System Engineering
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    • v.5 no.4
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    • pp.38-43
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    • 2001
  • This paper describes the effect of dynamic characteristics in tube line by external vibration conveying fluid with the power steering system. By the experimental analysis we found out that the factor of system vibration is the fluid-structure interaction of tube line. In fluid-filled tube system we study on the influence that the natural frequency of system and the frequency of wave motion produce upon through experiment. Experiments are modal test, frequency response function in continuous system, and vibrating tests when the system is driving with bolted clamping joint condition. From the results of the experimental studies, we obtained that the natural frequencies of system are very important than the wave induced vibrations. And we found that the tendency of system vibration level was decreased by bolting force, bolting condition and clamping distance.

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Seedling Quality and Bolting Response by Seeding Time in Angelica gigas Nakai (참당귀(當歸)의 파종시기(播種時期)에 따른 묘소질(苗素質) 및 추태반응(抽苔反應))

  • Yu, Hong-Seob;Bang, Jin-Ki;Kim, Young-Guk
    • Korean Journal of Medicinal Crop Science
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    • v.6 no.2
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    • pp.160-164
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    • 1998
  • Angelica gigas has been a major medicinal crop in Korea for a long time. This study was to determine optimum seeding time and bolting response by shifting seeding time between November 10, 1993, and August 10, 1994 using promising line, Suwon 2. Days to emergence were similar among seeding times from April 10 to August 10 in Suwon. Seedling duration was shortened 92 days when seeded on July 10 compared with the conventional seeding time of April 10. Productivity of seedling ranging from 0.31 to 0.70cm in diameter was highest of 730 plants per $m^2$ in July 10 seeding. When seeded in July 10, bolting rate was 2.4 percent as compared with 2.6 percent in conventional seeding (April 10). The optimum seeding time was July 10. Seedling quality, survival rate after planting in field, and root yield were greatly influenced by seeding time.

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