• 동력기계공학회지
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• 제15권4호
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• pp.5-10
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• 2011

In case of using rapid vacuum-freeze drying for high quality dry flower of flowering plant, the morphological and physiological characteristics of dry rose showed as the following. The dry ratio of about 82% presented after 1 day in case of using rapid vacuum-freeze drying and it was reached that the optimum storage water content of general dry products was 18%. The dry ratio of about 89% presented after 4 days. This result indicates very short dry time comparing with natural dry time of 12 days. Also, the morphological characteristics of flowering plant in case of vacuum-freeze drying showed similar shape with real flower. The contraction decreased about 9% comparing with real flower under dry time of 72 hours. But the contraction in case of natural dry decreased 36% and showed noticeable difference. The brightness which affects physiological characteristics of dry flowering plant showed lower values according to the dry process and chromaticity was thick. After 4 days, natural dry was thick with about 2 times comparing with vacuum-freeze drying. In case of vacuum-freeze drying, the quantity of anthocyanin and chlorophyl which affect discoloration and bleaching of dry flowering plant showed the clear difference comparing with natural dry method due to the sublimation by vacuum after rapid freeze with short initial time.

• 생물환경조절학회지
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• 제2권2호
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• pp.136-146
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• 1993

쑥갓의 개화에 미치는 한계일장을 구명하고 차광처리, 관수량 및 생장조절제 처리에 따른 쑥갓의 개화반응을 보고자 실험하여 다음과 같은 결과를 얻었다. 일장을 12, 14 및 16시간으로 처리한 결과 일장이 증가할수록 초장은 증가하였으며, 개화시기는 빨라졌다. 또한 생육이 진전될수록 일장에 민감하게 감응하고, 화기 발육도 빨라졌으며, 특히 엽수가 8매 이상일 때 장일처리 효과가 뚜렷하였다. 쑥갓의 개화 유도에 필요한 장일처리 일수는 10일 이상인 것으로 나타났다. 차광처리시 65% 차광구(40,0001ux)는 대조구보다 약 20일 늦게 개화하여 개화지연 효과가 나타났다. 관수량은 증가시킬수록 개화가 억제되었다.

• Journal of Plant Biotechnology
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• 제45권2호
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• pp.83-89
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• 2018

The interplay of plant hormones is one of the essential mechanisms for plant growth and development. A recent study reported that Brassinosteroids (BR) and ABSCISIC ACID (ABA) interact antagonistically in early seedling developments through the BR-mediated epigenetic repression of ABSCISIC ACID-INSENSITIVE 3 (ABI3). However, the other physiological roles of the BR-mediated regulation of ABI3 and ABA responses beyond early seedling developments remain largely unknown. Here, we showed that the activation of BR signaling by high temperatures promotes flowering time through the suppression of ABI3 expressions. Elevated ambient temperature induced early flowering in wild type Col-0 plants, but not in BR-defective bri1-116 mutant plants. Conversely, a hyper BR biosynthetic dwf4-D mutant displayed more sensitive thermomorphic long shoot elongation and early flowering. Both expression patterns and physiological responses supported the biological roles of ABI3 in the regulation of floral transition and reproduction under high temperature conditions. Finally, we confirmed that the lowered expressions of the transcript and protein levels of ABI3 brought on by elevated temperature were correlated with warmth-induced early flowering phenotypes. In conclusion, our data suggest that the BR- and warmth-mediated regulation of ABI3 are important in thermomorphic reproductive phase transitions in plants.

• 한국작물학회지
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• 제50권spc1호
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• pp.167-170
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• 2005

To obtain some information on the change of antioxidant components of seeds during grain filling stage as affected by the sowing dates, lignan compounds were investigated according to days of flowering under different sowing dates. Sesamin and sesamolin contents showed significantly different by days of flowering and varieties. Both of sesamin and sesamolin content increased after flowering and reached highest at 40 days of flowering, but they started to decrease thereafter, Sesamin and sesamolin contents of sesame seeds changed with sowing dates. Generally, late sowing date of May 30 showed relatively higher accumulation rate of sesamin and sesamolin contents rather than other sowing dates, but overall patterns were a little different by varieties and lignan compounds. In Yangbaekkae, sesamin and sesamolin contents showed relatively higher at sowing date of May 30, but Yanghuckkae showed higher sesamin and sesamolin contents till 20 days of flowering when sowing date of May 30, but it showed to change that both lignan contents were relatively higher under sowing date of May 10.

• 한국자원식물학회지
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• 제25권3호
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• pp.323-328
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• 2012

This paper describes the potential use of deep sea water to stimulate seed germination in both common and Tartary buckwheat. Treatment of 10% deep sea water at $25^{\circ}C$ would slightly enhance germination of buckwheat seeds compared to non-DSW treatment and other temperature. In this study, the significant effects of photoperiod and temperature on seedling growth were also found in the HL treatment for the number of leaf, plant height, and plant fresh weight and LL treatment for root length and leaf size. Common buckwheat (Suwon No.1) showed higher rate (93%) of flowering plants in the HS and LL (93% of flowering rates) than those revealed in the HS and LS treatment, while the low percentage(67%) of plant flowering plants was shown in the LS treatment. All plants (100%) of a Korean landrace, Ahndong-jaerae showed flowers in the HS and LS treatment. HL and LL treatment status did not occur in the plant's flowering. Any Tartary buckwheat (KW45) plant did not yet flowered when it was 21 days-old.

• Molecules and Cells
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• 제26권4호
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• pp.368-372
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• 2008

Recent molecular and genetic studies in rice, a short-day plant, have elucidated both conservation and divergence of photoperiod pathway genes and their regulators. However, the biological roles of rice genes that act within the autonomous pathway are still largely unknown. In order to better understand the function of the autonomous pathway genes in rice, we conducted molecular genetic analyses of OsFVE, a rice gene homologous to Arabidopsis FVE. OsFVE was found to be ubiquitously expressed in vegetative and reproductive organs. Overexpression of OsFVE could rescue the flowering time phenotype of the Arabidopsis fve mutants by up-regulating expression of the SUPPRESSOR OF OVEREXPRESSION OF CO1 (SOC1) and down-regulating FLOWERING LOCUS C (FLC) expression. These results suggest that there may be a conserved function between OsFVE and FVE in the control of flowering time. However, OsFVE overexpression in the fve mutants did not rescue the flowering time phenotype in in relation to the response to intermittent cold treatment.

• 한국농림기상학회지
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• 제19권4호
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• pp.252-269
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• 2017

본 시험은 품종별 개화가 가능한 기준온도와 저온($5.0^{\circ}C$) 누적시간 및 발아 후 변온에 따른 평균 개화소요일수를 구명하여 국내 주요 사과품종('후지', '쓰가루')들과 국내에서 육성한 품종('추광', '감홍', '홍안', '홍금', '홍로', '홍소', '화홍', '섬머드림', '선홍')들의 개화기를 예측하고자 군위지역에서 4년(2009-2012년)동안 조사하였다. 또한, 이들 자료를 이용하여 군위 지역 기온이 현재보다 $5.0^{\circ}C$ 상승되었을 때의 개화시기를 추정하였다. 저온($5.0^{\circ}C$) 누적시간(저온요구도)의 처리 범위는 0~1,671hr 정도였고, 저온 처리 후 개화를 위한 고온(고온요구도) 처리 범위는 $5.0{\sim}29.0^{\circ}C$ 정도였다. 발아 후 변온 처리구들은 항온구(대조구), $5.0{\sim}10.0^{\circ}C$ 상승구 및 하강구로 분류하였다. 결과를 살펴보면, 저온에서의 누적시간이 짧을수록 개화소요일수가 길어지는 경향이 있었으며, 0hr 처리구의 발아 후 개화까지의 소요된 일수는 1,335~1,503hr 처리구보다 2~4주 정도 길었다. 품종 별로는 모든 품종이 발아 후 기온이 $10.0^{\circ}C$ 미만일 때 개화를 하지 못하였고, 저온요구도가 낮은 품종일수록 개화에 필요한 고온요구도가 낮았다. 발아 후 기온을 $15.0^{\circ}C$로 조절된 처리구들의 개화소요일수는 $10.0^{\circ}C$ 처리구들보다 1~3주 정도 빨랐다. 발아 후 변온 처리에서는 발아 후 기온 상승 처리구들의 발아 후 개화까지 소요된 일수가 항온 처리구보다 짧았다. 이상의 결과를 종합해보면, 국내 주요 사과품종들의 개화 기준온도는 $10.0^{\circ}C$로 생각되었으며, 군위지역의 기온이 지금보다 $5.0^{\circ}C$ 정도 상승된다고 가정하면, 개화기는 1주 정도 지연될 것으로 예측되었다.

• 한국작물학회지
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• 제38권1호
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• pp.23-30
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• 1993

참깨 종실의 등숙진전에 따라 항산화성분, 함유률 및 천입중을 조사분석하므로써 품질향상을 위한 신품종육성과 재배기술 개선에 기초정보로 이용하고자 무분기형 단백깨와 수원깨, 분기형 안산깨와 한성깨를 공시하여 실시한 시험결과를 요약하면 다음과 같다. 1. 분기형 참깨는 sesamin 함량, sesamolin 함량이 축적시기가 개화후 10일경부터 무분기형 참깨는 개화후 20일경부터 급격한 함량증가를 보여 분기형의 참깨에서 축적시기가 다소 빠른 것으로 나타났다. 개화후 43일 이후에는 약간의 함량감소를 보였다. 2. 참깨 과성에 따라 sesamin 함량은 3과정 참깨에서는 개화후 10일부터 40일까지 완만한 함량증가를 보인반면 1과성 참깨는 개화후 10일부터 30일까지 급격한 함량증가를 보였으며 sesamolin 함량은 3과정 참깨는 개화후 10일부터 50일까지 완만한 함량증가를 보인반면 1과정 참깨는 개화후 10일부터 30일까지 급격한 함량증가를 보여 1과성 참깨에서 축적시기가 다소 빠른 것으로 나타났다. 3. Sesamin 함량, sesamolin 함량, 함유률, 천입중의 급격한 증가시기는 개화후 20일에서 40일 사이에 급격히 증가하여 이 시기가 동화저장양분이 종실로 전환하는 시기일 것으로 생각된다. 4. 2차 회귀방정식에 의해 최대에 달하는 시기는 Sesamin 함량 43일, sesamolin 함량 45일, 함유률 47일, 천입중이 48일로 추정되었다. 5. 따라서 참깨의 유질이 가장 우수한 생리적 성숙기는 개화후 43일에서 48일 사이에 속하는 것으로 생각된다.

• 원예과학기술지
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• 제19권4호
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• pp.568-573
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• 2001

본 실험은 triazole계 화합물을 백일홍 'Dream Land Rose'와 'Dream Land Scarlet'에 경엽살포 또는 토양관주처리를 하여 생육 및 개화에 미치는 영향을 조사하기 위하여 수행하였다. 경엽살포처리에서 'Dream Land Rose'의 초장은 tebuconazole, diniconazole, bitertanol에서 크게 감소하였으며 특히, tebuconazole이 가장 큰 왜화효과를 보였고 지상부 생체중도 가장 적었다. 꽃의 직경, 생체중, 건물중도 tebuconazole 고농도에서 현저하게 감소하였다. 한편, 개화소요일수는 약제처리에 의한 영향을 받지 않았다. 'Dream Land Scarlet'의 초장도 모든 처리에서 감소하였고, 특히 tebuconazole에서 현저한 감소를 보였다. 개화소요일수는 diniconazole에서 단축되었다. 토양관주처리에서 'Dream Land Rose'의 초장은 diniconazole과 myclobutanil에서 감소하였으나 diniconazole이 더 효과적이었다. 개화소요일수는 diniconazole에서 단축되었다. 'Dream Land Scarlet'의 초장은 모든 처리에서 감소하였으며, mycrobutanil $300mg{\cdot}L^{-1}$에서 극심한 억제현상을 보여서 개화가 이루어지지 못하였다. 개화소요일수는 diniconazole에서 증가하는 경향을 보였다.

• Journal of Ecology and Environment
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• 제37권4호
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• pp.165-175
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• 2014

A natural population of Adonis multiflora, a spring ephemeral herb growing in temperate deciduous forests, was studied to determine the seed production characteristics. Plant size, flowering time, and seed number were monitored from February 2009 to May 2011 in main growing season (i.e., from March through May). The biomass rates of the shoot and the root in the A. multiflora population were 22-24% and 76-78%, respectively, and the biomass of the root was proportional to that of the shoot. The flowering rate was 60% in the plants with 1 to 2 g of shoot biomass, and 100% in the plants with >2 g of shoot biomass. In the plants with root biomass between 4 and 6 g, the flowering rate was 43% and, in the plants with the root biomass over 8 g, it was 100%. The shoot biomass was a better predictor of the flower production probability than the root biomass. The number of flowers and seeds was closely correlated to shoot biomass at 1% significance level. The size of the plant that produced seed excessively instead of the shoot biomass in one year typically decreased in the next year and vice versa. The flowering time and its duration were closely related to the number of faithful seeds but not to that of total seeds. The number of faithful seeds was proportionate to flowering duration and inversely proportionate to flowering time (year day, YD). In a plant, the number of faithful seeds noticeably decreased with the inflorescence (i.e., order of flower in a plant), and this difference between the two successive flowers was significant at the 1% level between the first and the third flower in 2009 and 2011 but not between the third and the fourth. However, the number of total seeds was mostly similar in the first through the fourth flower for all three years.