• 한국자원식물학회지
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• 제1권1호
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• pp.88-92
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• 1988

The study was conducted to determine the optimal basal media and the concentration of plant growth regulator for germination of seeds and growth of plantlet from Dendrobium monile. The results obtained were summarized as follows. Germination was similar in light and dark condition, but the growth of plantlet after germination was better under dark than under light condition in several media. Germination was best in Hyponex and Kyoto solution medium among the 9 media tested. The number of roots/shoot was most in the Hyponex medium containing 0,1ppm NAA and 1.Oppm BA.

• 한국작물학회지
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• 제31권3호
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• pp.293-298
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• 1986

담배종자의 발아생리를 깊게 이해하여 건묘육성의 기초자료를 얻고자 종자를 파종하여 발아될 때까지 종자체내에서 일어나는 생리적 변화를 명암조건 및 온도별로 조사하여 다음과 같은 결과를 얻었다. 1. 발아과정중 수분흡수는 치상후 3∼6시간까지 물리적인 수분흡수단계, 다음 6시간부터 24시간까지 보합세유지 세째단계로 48시간∼168시간까지 급격한 수분흡수 증가를 보이는 단계로 나눌 수 있었다. 그러나 암조건 및 저온에서는 세째단계의 급격할 수분흡수 양상을 볼 수 없었다. 2. 발아과정중 호흡의 변화도 수분흡수와 비슷하여 처음 48시간까지 호흡의 증가가 없었으나 48시간 이조 발아시작과 함께 급격허 상승하여 120시간을 전후하여 최고에 달하였다가 점차 떨어졌다. 반면, 암조건에서는 호흡이 매우 낮고 변화가 없었다. 3. 발아신 호흡의 증가와 더불어 지방산의 감소가 상응하게 일어났으며 당 및 지방산의 변화가 광조건에서는 많이 변화하였으나 암조건에서는 변화가 없었다.

• 한국약용작물학회지
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• 제18권1호
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• pp.9-14
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• 2010

Several presowing seed treatments have been used to facilitate the seed germination and seedling emergence. The study was performed to design a model of presowing seed treatments in Taraxacum platycarpum. Germination and seedling growth responses to temperature, drying, chilling, $GA_3$ and priming were investigated to know the optimum germination conditions and presowing treatment. The optimum temperature condition for germination and seedling growth were $15{\sim}20^{\circ}C$ at dark condition. The seeds exposed to infra red light, however, did not germinate. The moisture content of seeds dried at $35^{\circ}C$ for 3.5 hours was returned to the level of unimbibed seeds. The germination of seeds dried under dark condition was better than those dried under infra red light. Prechilling treatment imposed for 6 weeks showed higher germination rate than $GA_3$ treatment or priming. In field test, the highest field emergence was observed in the seeds dried after prechilled for 6 weeks and followed by drying followed by $GA_3$ > low temperature > $KNO_3$ priming. Imbibition with 0.1 mM $GA_3$ solution for 2 hours then drying at 35 for 3.5 hour under dark condition was effective to the practical presowing treatment for Taraxacum seeds.

• 한국자원식물학회지
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• 제13권3호
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• pp.202-207
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• 2000

자생식물 16종의 종자형질 특성 및 저온습윤 및 변온 처리에 의한 발아양상을 조사하기 위하여 본실험은 수행되었다. 종에 따라 종자의 길이, 넓이, 폭은 각각 1.1∼8.9, 0.7∼7.5, 0.4∼l.7mm의 범위였으며 천립중은 0.1∼8.8g의 범위였다. 무처리에서 발아율이 가장 높은 종에 있어 냉이와 익모초는 암조건에서 각각 16, 36%이었으며 장구채와 각시취는 명조건에서 각각 69, 81%이었다. 참취, 고려엉겅퀴, 곰취, 질경이, 청옥취는 저온습윤처리 명조건에서 각각 84, 29, 57, 78, 95%로 물엉겅퀴는 암조건에서 30%로 발아율이 가장 높았다. 변온처리에서 발아율이 높은 종에 있어 두릅나무와 벌개미취는 명조건에서 각각 2,57%로, 수리취는 암조건에서 52%로 가장 높았다.

• 한국자원식물학회지
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• 제2권1호
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• pp.235-241
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• 1989

The study was conducted to determine the Ms orthogonaL modia and the concentration of plant growth regulator for seed matura-tion and growth of rhizome from Cymbidium goeringii Germination waswell in dark condition, but the growth of rhizome was better un-der dark than under light condition in MS orthoTonal . Sucrose con-centration( 3 %) gave better results than higher ones(6%), andthe use of NAA(0.1 PPm) effect significant difference of seed ge-rmination .But the growth of rhizome was best in medium Containingsucrose concentration(3%) Ippm NAA and 1 PPm BA.

• 아시안잔디학회지
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• 제15권1호
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• pp.15-20
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• 2001

Two types of annual bluegrass have been reported, and those consist of annual type (Poa annua ssp. annua) and perennial type (Poa annua ssp. reptans). As a weed, annual bluegrasses are commonly found in putting greens and fairways in many golf courses. Due to its strong competitiveness such as tremendous seed reproduction rate a year, prostrate growth habit, and no herbicide availability, annual bluegrasses have been considered as one of the most hard-to-control weeds in turf management systems. A growth chamber study was conducted to determine seed dormancy and to understand seed germination characteristics of annual bluegrass (Poa annua ssp. annua). Freshly harvested seeds showed 80 and 55% germination at 30 and $35^{\circ}C$, respectively, indicating that the optimum temperature of annual bluegrass is $30^{\circ}C$. However, the seed germination occurred only under light condition at any given temperature. This result demonstrated that light is prerequisite for the seed germination, and no primary dormancy of annual bluegrass seed exists. Secondary seed dormancy induced by unfavorable temperatures and dark condition was broken through 4 to 6 wk-storage at $4^{\circ}C$ with moisture, and the stored seeds germinated at $20^{\circ}C$ even under the dark. In red and far-red light trial, fresh seeds resulted in 40% germination under red while no seed germination occurred under far-red light condition, indicating that phytochrome Pr and Pfr could be related to annual bluegrass seed germination. When the far-red light replaced the red the germination was recovered, but this reversibility did not reach to the germination level under the red light only. This result implied that other lights than red and far-red would play an important role on seed germination of annual bluegrass.

• 한국자원식물학회지
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• 제13권3호
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• pp.219-226
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• 2000

본실험은 울릉도와 오대산 산마늘 자생종의 종자의 특성 및 물리·화학적 처리에 의한 종자의 발아 양상과 가온개시기에 따른 종구의 휴면 특성을 조사하기 위해 수행하였다. 종자의 특성에 있어 모양, 색, 탈립성은 2개 자생종이 비슷하였으나 그 외의 형질에서는 달랐다. 천립중는 울릉도 자생종이 14.8g 으로 오대산 자생종에 비해 2.1배였다. 울릉도 자생종은 채종 즉시 파종한 처리에서만 발아하였으며 화학제 처리효과는 없었다. 또한 무처리 암장태에서 발아율이 86%, 평균발아일수 42일, 발아계수 2.05이었으며, 저온유수 및 저온습윤혼용처리에서는 발아율이 감소하였다. 오대산 자생종은 무처리 암장태에서 발아율이 70%, 평균발아일수 47일, 발아계수 1.0이었는데, 저온습윤 처리에서는 명장태에서 발아율 82%, 평균발아일수 47일, 발아계수 1.75로 광에 대한 반응이 달라졌다. 오대산 자생종 종구는 초상후 45일 이후가 되어야 휴면이 타파되어 가온개시시기로써 적합할 것으로 보여진다.

• 한국약용작물학회지
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• 제9권4호
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• pp.295-300
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• 2001

지황 pelleting 종자의 발아특성을 구명코자 온도에 따른 발아율, 채종 후 기간, pelleting물질의 종류, pelleting 크기에 따른 발아율 조사한 결과 온도 및 채종 후 기간에 따른 발아율은 명조건, 암조건 모두 $25^{\circ}C$에서 발아율이 높았으며, 당년에 채종한 종자에 비해 채종 후 1년 경과한 종자가 발아율이 높았다. Pelleting 물질별 발아율은 talc처리에서 82.5%로 가장 높았다. Pelleting 종자 크기에 따른 발아율은 2.0mm 크기가 발아율이 높았으며, 특히 talc 2.0 mm에서는 100%의 발아율을 보였다. Pelleting 물질 조합처리에서는 talc + vermiculite, zeolite + vermiculite 모두 대조구보다 발아율이 낮았으며, pelleting 크기별 발아율은 0.7 mm에서 가장 높았다.

• 한국환경과학회지
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• 제30권1호
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• pp.77-85
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• 2021

This study was carried out to establish optimal conditions for breaking dormancy of Agastache rugosa O. Kuntze seeds. A series of experiments according to seed maturity and treatment with plant growth regulators were performed to improve germination percentage and synchronize germination of the seeds. In addition, it was conducted to test whether the useful effect of seed treatment before sowing leads to healthy seedling and early vigorous growth. The average seed size was 1.85 mm (length) × 0.82 mm(width). The seed size was much smaller than other vegetable seeds. Seeds colorappeared dark brown, the shape of the seeds was oval and the weight of 1,000seeds was 352.8 mg. The optimum germination temperature was 22℃. Light exposure during germination did not affect germination promotion, suggesting that A. rugosa seeds are a kind of dark germinating seeds. Seed dormancy lasted for 40 days after harvesting, and GA3 treatment of dormant seeds could break dormancy. There were significant differences in germination percentage and rate according to the maturity of seeds. The germination percentage of mature seeds was 10 - 18% higher than that of immature seeds, and germination rate was 2 days faster. GA3 treatment during growth regulator treatment improved germinability, but BAP or ethephone treatment did not. The optimal growth regulator concentration of for germination was the combination treatment of 100 mM GA3 ＋ 100 mM BAP.

• 원예과학기술지
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• 제31권6호
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• pp.700-705
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• 2013

This study was initiated to evaluate hydrophilic polymers (hydrogels) as a new solid matrix medium for seed-priming of Heteropappus arenarius Kitam. Solid matrix priming (SMP)-media were prepared with the combination of Na- and K-based hydrogels and hydrogels with three different dry levels (DC; 70%, 80%, and 90%). Priming was performed in the dark at 15 or $20^{\circ}C$ for 24 hours, and all primed seeds were incubated at $20^{\circ}C$ in the dark for the germination test. Non-primed seeds and seeds primed with distilled water (DW) were also included. To reach the germination rate of 50% ($T_{50}$), it took 4.0 days for non-primed seeds, and 3.6 and 3.9 days for DW-primed seeds at 15 and $20^{\circ}C$, respectively. Na-based hydrogel-primed seeds with 70% DC (Na 70%) showed the fastest germination, which respectively took and 1.9 and 1.8 days at 15 and $20^{\circ}C$ to $T_{50}$. K-based hydrogel-primed seeds with 70% DC showed the fastest germination among K-based hydrogels with various DC levels, but it took 0.6 days more to $T_{50}$ compared to Na 70%. The hydration rate (HR) of DW-primed seeds was 37% lower than that of Na 70%-primed seeds at $15^{\circ}C$ priming temperature, which indicates that Na 70% priming is the best solid matrix priming condition for promoting the germination of H. arenarius seeds.