• Title/Summary/Keyword: Short day response

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Flowering Response According to Different Seeding Dates and Day-length Treatment in Perilla (들깨 파종기와 일장처리에 의한 품종간 개화반응)

  • 정찬식;오기원;김현경;권일찬;배석복;박충범;곽용호
    • KOREAN JOURNAL OF CROP SCIENCE
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    • v.48 no.6
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    • pp.490-494
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    • 2003
  • To understand flowering response under diverse day-length condition and the movement of floral stimulus, we used six perilla accessions which showed diverse days to flowering. Though the growth phase was reported as irreversible between vegetative and reproductive stage, perilla showed reversible growth phase according to day length increase in May and June. When it sowed in March, flowering response was started in early May and vegetative and reproductive phase was coexisted in late June. When a part of a perilla plant was treated under short day condition, only apical buds on main stem or branches were flowered but other long day conditioned apical buds were not flowered. With this result it is suggested that the floral stimulus can not be transferred to other part of perilla.

Breeding of Red Compact Poinsettia Cultivar 'Clara' (적색의 컴팩트한 포인세티아 'Clara')

  • Lee, Eun-Kyung;Kim, Won-Hee;Kim, Seung-Tae;Lee, Su-Young
    • Korean Journal of Breeding Science
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    • v.42 no.6
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    • pp.664-667
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    • 2010
  • A new poinsettia cultivar 'Clara' was bred by the National Institute of Horticultural and Herbal Science (NIHHS) in 2005. A cross was made between 'Red Velvet', a variety with dark green leaves and red bracts, and 'Freedom Bright Red', a variety with early short day responding and bright red bracts, in 2002. 'Clara' was finally selected in 2005 after the investigation of the growth and flowering characteristics from 2003 to 2005. 'Clara' has red ovate bracts and weak intensity of rugosity between bract veins. Leaf blade is ovate and medium green. Petiole length is relatively short, and stem color is reddish. 'Clara' has medium free-branching ability and makes short and compact canopy. Clara's bracts and transitional leaves are fully colored 9 weeks after short day commencement.

Changes in Hematological, Biochemical and Non-specific Immune Parameters of Olive Flounder, Paralichthys olivaceus, Following Starvation

  • Kim, Jong-Hyun;Jeong, Min Hwan;Jun, Je-Cheon;Kim, Tae-Ik
    • Asian-Australasian Journal of Animal Sciences
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    • v.27 no.9
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    • pp.1360-1367
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    • 2014
  • Triplicate groups of fed and starved olive flounder, Paralichthys olivaceus (body weight: $119.8{\pm}17.46$ g), were examined over 42 days for physiological changes using hematological, biochemical, and non-specific immune parameters. No significant differences in concentrations of blood hemoglobin and hematocrit and plasma levels of total cholesterol, aspartate aminotransferase, alanine aminotransferase, glucose, and cortisol were detected between fed and starved groups at any sampling time throughout the experiment. In contrast, plasma total protein concentrations were significantly lower in starved fish than in fed fish from day 7 onwards. Moreover, plasma lysozyme concentrations were significantly higher in starved flounder from day 21 onwards. This result confirms that the response of olive flounder to short-term (less than about 1.5 months) starvation consists of a readjustment of metabolism rather than the activation of an alarm-stress response. The present results indicate that starvation does not significantly compromise the health status of fish despite food limitation.

Efficacy and safety of growth hormone treatment for children born small for gestational age

  • Hwang, Il Tae
    • Clinical and Experimental Pediatrics
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    • v.57 no.9
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    • pp.379-383
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    • 2014
  • Recombinant growth hormone (GH) is an effective treatment for short children who are born small for gestational age (SGA). Short children born SGA who fail to demonstrate catch-up growth by 2-4 years of age are candidates for GH treatment initiated to achieve catch-up growth to a normal height in early childhood, maintain a normal height gain throughout childhood, and achieve an adult height within the normal target range. GH treatment at a dose of $35-70{\mu}g/kg/day$ should be considered for those with very marked growth retardation, as these patients require rapid catch-up growth. Factors associated with response to GH treatment during the initial 2-3 years of therapy include age and height standard deviation scores at the start of therapy, midparental height, and GH dose. Adverse events due to GH treatment are no more common in the SGA population than in other conditions treated with GH. Early surveillance in growth clinics is strongly recommended for children born SGA who have not caught up. Although high dose of up to 0.067 mg/kg/day are relatively safe for short children with growth failure, clinicians need to remain aware of long-term mortality and morbidity after GH treatment.

Breeding of early colored poinsettia "Early Bird" (착색이 빠른 포인세티아 "Early Bird" 육성)

  • Lee, Eun-Kyung;Kim, Won-Hee;Park, Pil-Man;Kim, Seung-Tae;Lee, Dong-Woo;Kim, Young-Jin
    • Korean Journal of Breeding Science
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    • v.41 no.1
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    • pp.32-35
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    • 2009
  • A new poinsettia cultivar "Early bird" was bred by the National Institute of Horticultural and Herbal Science (NIHHS) in 2007. A cross was made between 'Ichiban', a variety with deep lobed transitional leaves and bright red bracts, and 'Freedom Red', a vigorously growing dark red colored variety in 2004. "Early bird" was finally selected in 2007 after the investigation of the growth and flower characteristics from 2005 to 2007. "Early bird" has bright red colored, wide obovate bracts. Leafblade is dark green and ovate. Plant height is short and stem color is greenish. Response to short day is early and its bracts and transitional leaves are fully colored 6.5 weeks after short day commencement.

Varietal Difference for Cool Temperature and Short-day in Nicotiana tabacum L. (연초 품종간 저온단일 감응성의 차이)

  • Jeong, Yun-Hwa;Keum, W.S.;Lee, S.C.
    • Journal of the Korean Society of Tobacco Science
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    • v.13 no.1
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    • pp.69-73
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    • 1991
  • Varietal response to cool temperature(18$^{\circ}C$) and short (8hr.)-day treatment were investigated under controlled conditions of Phytotron in the Suwon Agronomy Experiment Station. Five flue-cured and one burley tobacco varieties (Nicotiana tabacum L.) were used, and the length of treatment ranging from 8 to 32 days at 3-day intervals and also includes continuous treatment up to the plants were flowered. The days to flower decreased significantly than the no treatment when the length of treatment was 11 to 14 days for the varieties NC82, Br.21 and NC22NF, and 17 to 26 days for SPG-28, Mc.944 and TC499, respectively. And also the number of leaves decreased significantly than the no treatment when the length of treatment was 8 days for NC22NF, 11days for NC82 and Br.21, 14 days for Mc.944, and 17 days for SPG-28 and TC499, respectively. The maximum decreasing ratio of the leaf number by the cool temperature and short-day treatment were 47.7 to 58.5% for NC82, Br.21 and NC22NF, and 38.9% for Mc.944, 33.4% for SPG-28 and 29.0% for TC499, respectively.

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Varietal Difference of Some Traits Related to Earliness under Different Daylength in Barley (일장처리에 따른 보리의 출수관련형질의 품종간 차이)

  • Chun, Jong-Un;Lee, Eun-Sup;Cheong, Dong-Hee
    • KOREAN JOURNAL OF CROP SCIENCE
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    • v.30 no.3
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    • pp.314-319
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    • 1985
  • In order to observe the differences of several characters related to earliness, seven barley varieties were tested under two different photoperiodic conditions. Final leaf number per main stem under long day did not vary among varieties, but ranged 6 to 7 in early group and 9 to 10 in late group under shortday. Shoot apex of early varieties, Jogangbori and Oweolbori reached to X stage at 24 days, but that of late variety, CI 15446 did to X stag at 32 days after transplanting under short day. Spike length reached to maximum length at 39 days in early group, but at 51 days in late group. Saeolbori, CI 15446 and Hangmi were photo-sensitive, but Jogangbori and Oweolbori were photo-insensitive. Therefore, the photoperiodic response to short day was most responsible to heading time. Those results showed that early heading varieties had the characteristics with less variation of final leaves, less retardation of shoot apex development and spike elongation, and shorter period to flag leaf emergence under short day.

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Flowering Responses to Sequential Short Day/Long Day Exposure in Chrysanthemum (Dendranthema grandiflora Tzvelev) (교호적 단일/장일 처리에 대한 국화의 개화반응)

  • Lee, Byung-Joo;Won, Mi-Kyoung;Lee, Dong-Hee;Shin, Dong-Gi
    • Horticultural Science & Technology
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    • v.19 no.4
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    • pp.560-563
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    • 2001
  • To determine the minimum number of short day (SD) required for flower initiation and development of chrysanthemum, plants were exposed to SD and long day (LD) conditions. Floral development was significantly different between continuous exposure of 16 hour long day (LD) condition and 2 or 4 SD prior to LD in chrysan-themum cvs. Envy and Lady Time, respectively. As more SD exposure was given, final leaf number was decreased and floral stage was advanced, suggesting a facultative response to photoperiodic cycles. Therefore, only 2-4 days of SD were enough to induce flower initiation. After 6 weeks of SD condition, the plants continued anthesis regardless of subsequent photoperiods. The long day leaf number (LDLN) varied between cultivars as 38.0 and 45.4 in Envy and Lady Time, respectively.

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Short-course versus long-course neoadjuvant chemoradiotherapy in patients with rectal cancer: preliminary results of a randomized controlled trial

  • Aghili, Mahdi;Khalili, Nastaran;Khalili, Neda;Babaei, Mohammad;Farhan, Farshid;Haddad, Peiman;Salarvand, Samaneh;Keshvari, Amir;Fazeli, Mohammad Sadegh;Mohammadi, Negin;Ghalehtaki, Reza
    • Radiation Oncology Journal
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    • v.38 no.2
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    • pp.119-128
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    • 2020
  • Purpose: Colorectal cancer is becoming an increasing concern in the middle-aged population of Iran. This study aimed to compare the preliminary results of short-course and long-course neoadjuvant chemoradiotherapy treatment for rectal cancer patients. Materials and Methods: In this clinical trial we recruited patients with rectal adenocarcinoma located from 5 cm to 15 cm above the anal verge. Patients in group I (short-course) received three-dimensional conformational radiotherapy with a dose of 25 Gy/5 fractions in 1 week plus concurrent XELOX regimen (capecitabine 625 mg/㎡ from day 1-5 twice daily and oxaliplatin 50 mg/㎡ on day 1 once daily). Patients in group II (long-course) received a total dose of 50-50.4 Gy/25-28 fractions for 5 to 5.5 weeks plus capecitabine 825 mg/㎡ twice daily. Both groups underwent consolidation chemotherapy followed by delayed surgery at least 8 weeks after radiotherapy completion. The pathological response was assessed with tumor regression grade. Results: In this preliminary report on complications and pathological response, 66 patients were randomized into two study groups. Mean duration of radiotherapy in the group II (long-course) was 5 ± 1 days (range, 5 to 8 days) and 38 ± 6 days (range, 30 to 58 days). The median follow-up was 18 months. Pathological complete response was achieved in 32.3% and 23.1% of patients in the shortcourse and long-course groups, respectively (p = 0.558). Overall, acute grade 3 or higher treatment-related toxicities occurred in 24.2% and 22.2% of patients in group I and II, respectively (p = 0.551). No acute grade 4 or 5 adverse events were observed in either group except one grade 4 hematologic toxicity that was seen in group II. Within one month of surgery, no significant difference was seen regarding grade ≥3 postoperative complications (p = 0.333). Conclusion: For patients with rectal cancer located at least 5 cm above the anal verge, short-course radiotherapy with concurrent and consolidation chemotherapy and delayed surgery is not different in terms of acute toxicity, postoperative morbidity, complete resection, and pathological response compared to long-course chemoradiotherapy.

Physiological and Genetical Characters for Early Maturity in Barley and Common Wheat

  • Yasuda, Shozo
    • KOREAN JOURNAL OF CROP SCIENCE
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    • v.35 no.6
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    • pp.548-558
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    • 1990
  • Physiology and genetics of early maturity in cereals are the subject of practical as well as scientific interest for agronomist and plant breeders, Thorough understanding of the true nature of such a complex character requires physiological and genetical knowledge about the internal factors, which are closely bound up with and react to some particular external or environmental factors. From the practical point of view. experiments should be conducted under controlled conditions. especially the day length and temperature, so that the genotypic differences pertaining to these factors may be discerned. Takahashi and Yasuda (1958, 1970) maintained that at least three physiological factors were responsible for determining earliness in barley. namely. (1) spring and winter habit of growth or vernalization requirement, (2) ogitioeruiduc response or sensitivity to short-day, and (3) earliness factor in a narrow sense or minimal vegetative growth. The same situations were true in common wheat also (Yasuda and Shimoyama, 1965), In this report. physiology and genetics of internal factors and their relations to the time of heading in the field will be presented with some problems concerning differences in mechanism of early maturity between barley and wheat.

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