• 한국작물학회:학술대회논문집
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• 한국작물학회 1991년도 춘계 학술대회지
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• pp.30-31
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• 1991

• 한국환경농학회지
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• 제17권1호
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• pp.39-42
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• 1998

사탕수수 찌거기를 여름느타리에 의해 발효한 후 부산물의 추출물로부터 생물학적 활성을 조사하기 위하여, 항종양성, 콩에 있어서의 glyceollin 유도성 및 완두에 있어서의 줄기 성장성을 관찰하였다. 알콜추출분획 및 DMSO분획물은 자실체 추출분획보다는 약했지만 매우 좋은 항종양성을 나타내었다. 콩의 자엽실험에서는 모든 추출물이 식물체로 하여금 병원성 감염을 방지할 수 있는 glyceollin 유도성을 갖고 있었다. 또한 IAA 유도 줄기성장 실험에서는 양성반응을 보인 모든 실험군에서 IAA와 추출물간의 유도 상승효과가 있는 것으로 나타났다.

• 원예과학기술지
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• 제34권1호
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• pp.55-66
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• 2016

This study was carried out to investigate the effect of artificial light sources with different light qualities on the growth and flowering characteristics of a herbaceous long-day plant, Petunia ${\times}$ hybrida Hort. Seedlings of petunia cultivar 'Madness Rose' were potted, acclimated for one week, and grown in a phytotron equipped with tube- and bulb-type fluorescent lamps (FL tube and bulb), tube-type white light-emitting diodes (LED tube), halogen lamps (HL), metal halide lamps (MH), and high pressure sodium lamps (HPS) for 10 weeks. The temperature, photoperiod, and photosynthetic photon flux density (PPFD) in the phytotron were $22{\pm}2^{\circ}C$, 16 h, and $25{\pm}2{\mu}mol{\cdot}m^{-2}{\cdot}s^{-1}$, respectively. Light sources combined with HL promoted stem elongation, and plant height and internode length decreased with increasing red to far-red (R:FR) ratio. FL tube + LED tube, HPS, and FL tube promoted branching, whereas plants grown under light sources combined with HL did not have any branches. Days to flowering (from longest to shortest) occurred as follows: FL tube + HL > FL tube + HL > MH > HPS = FL tube + FL bulb > FL tube + LED tube > LED tube > FL tube, indicating that reducing the R:FR ratio of the light sources promoted flowering. Only 20% of plants grown under an FL tube flowered, whereas under all other treatments, 100% of plants flowered. At 10 weeks after treatment, plants grown under HPS and MH had (cumulatively) 12 open flowers, and those grown under FL tube + FL bulb, LED tube, FL tube + LED tube, and HPS treatment had approximately seven flower buds. These results suggest that light sources with low R:FR ratios promote flowering and stem elongation in petunia, but they reduce its ornamental value due to overgrowth and poor branching.

• 생명과학회지
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• 제7권2호
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• pp.134-141
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• 1997

미류나무 잎절편 조직배양에 의한 식물체 재분화에 관한 여러 가지 여인을 조사한 결과를 요약하면 다음과 같다. 1. 5가지 각기 다른 농도를 가진 培地에 줅,절편을 치상하여 側牙의 발달을 유기시킨 결과, WPM이 MS배지 보다 더 좋은 반응을 보였고 또한 배지내의 NH$_{4}$NO$_{3}$의 양은 측아 증식에 큰 영향을 미치지 않는 것으로 관찰되었다. 2. 기내에서 증식된 잎을 3부분으로9윗, 중간 그리고 및) 절단하여 2종류의 식물성장 절물질(TDZ와NAA)의 16가지의 농도배합을 사용하여 배양한 결과 TDZ0.01mg/1와 NAA 0.02 mg/1에서 가장 높은 부정줄기 형성체들이 생성되었다. 또한 잎의 윗 부분 보다는 중간과 밑부분에서 높은 부정줄기 형성체들이 생성되었는 것을 관찰하였다. 3. 3가지 탄수화물을 사용하여 부정줄기의 유기를 관찰한 바, sucrose 나 glucose보다 fructose를 첨가한 배지에서 좋은 반응을 보여 주었다.

• 식물병연구
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• 제22권2호
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• pp.116-121
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• 2016

In 2015, stem blight of Rubus crataegifolius was observed in Pohang, Korea. The symptoms began as dark red spots in the stem, which led to stem blight, then leaf blight, and eventually resulted in death. A fungal isolate was obtained from a symptomatic stem and incubated on a potato dextrose agar plate. The isolated fungus produced white, cloudy mycelia turned black in 3 days. Based on the morphological characteristics, the causal fungus was assumed to be Botryosphaeria sp. A pathogenicity test was conducted according to Koch's postulates. To identify the causal agent, the combined sequence of the internal transcribed spacer, ${\beta}$-tubulin, and translation elongation factor $1{\alpha}$ genes were used for phylogenetic analysis. Approximately 1,200 bp of the combined sequence clearly suggested that the isolated pathogen was Botryosphaeria parva. This is the first report on stem blight in R. crataegifolius caused by B. parva in Korea.

• Journal of Plant Biology
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• 제37권3호
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• pp.317-323
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• 1994

The calluses formed on the surface of a quarter-girdled Robinia pseudoacacia stems have been shown to originate from immature xylem cells and preexisting cambial cells. The cellus is not only formed by periclinal and anticlinal divisions of radial cells, but also axial cells. In tangential view, the callus at initial stage showed heterogeneous structure composed of long and short cells and then homogeneous one with short cells. Some cells of homogeneous structure in middle region of callus at early stage is later elongated and others mainly divided in trasverse plane. In the result the homogeneous structure becomes into a heterogeneous one. Subsequently, the long cells in heterogeneous structures elongated further and became fusifrom initials, and the short cells divided transversely became ray initials. The appearence of homogeneous and heterogeneous structure in the callus on debarked stem without organ elongation is almost similar to that of the structure in the procambium of young stem which is elongating extensively. Eventually, the ontogeny of vascular cambium in wound callus resembles that of a young stem grown normally, although the debarked stem does not grow in length but in girth and the young stem elongates activity. These findings mean that the active intrusive growth of short procambial cells occurs during the differentiation of fusiform cambial cells.

• 원예과학기술지
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• 제33권5호
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• pp.633-637
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• 2015

Cucumber and paprika transplants were stored at 9, 12, 15, and $18^{\circ}C$ under dark conditions for 15 days and then grown in a greenhouse for 14 days after transplanting. To determine the effects of low storage temperature and long-term continuous darkness on the quality and vigour of transplants, we investigated the quality of transplants during storage and the growth of stored transplants after transplanting. In cucumber transplants, decreasing storage temperature reduced stem elongation and decrease in SPAD value. The quality of cucumber transplants stored at $9^{\circ}C$ was well preserved during storage, but they did not survive after transplanting due to chilling damage. Growth and development after transplanting were significantly greater when cucumber transplants were stored at $12^{\circ}C$. In paprika transplants, the quality of transplants did not significantly differ before and after storage. After transplanting, there was no significant difference in the survival rate and growth, but the number of flower buds was greater in the paprika transplants stored at lower temperatures (9 and $12^{\circ}C$). These results indicate that the responses of transplants to the conditions of low temperature and darkness differed between cucumber and paprika, and storage temperature in darkness must be controlled carefully considering species-specific responses to reduce quality deterioration during storage and improve the recovery of transplants after transplanting.

• 생물환경조절학회지
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• 제6권1호
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• pp.15-25
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• 1997

피망(Capsicum annuum L.) 플러그 육묘시 초장 조절을 위해 주야간 온도차(DIF)에 따른 16조합 처리를 50일간 실시한 뒤 각각의 묘소질에 따른 정식후 생육에 관하여 실험하였다. 주야간 온도차 처리에 따른 피망 플러그묘의 초장은 주간온도가 증가함에 따라 증가하였고, 같은 일평균 온도에서는 -DIF에 의해 억제되고, +DIF에 의해 촉진되었다. 엽전개 속도는 DIF처리 효과보다는 일평균 온도에 의해 좌우되었고, 생체중 및 건물중은 일평균 온도가 증가할수록 증가하였고 야간온도에 비해 주간온도가 크게 영향을 미쳤다. 엽면적과 줄기직경은 주야간온도가 16$^{\circ}C$부터 24$^{\circ}C$로 증가할 때까지 증가하다가 그 이상의 온도에서는 감소하였다. 육묘시 온도처리에 따른 제 1번화의 착생 절위는 일평균 온도가 증가할수록 낮아졌으나 화뢰의 퇴화는 오히려 증가하였다. 이상의 결과를 종합해 볼 때 피망육묘시 DIF를 조절하여 육묘시 초장조절이 가능하며 -DIF 처리로 초장이 억제된 유묘일지라도 정식후 +DIF 조건에서 재배함으로써 생육을 촉진시킬 수 있었다. 또한 엽전개 속도(생육속도)와 제 1번 화의 화아 분화도 일평균 온도를 조절함으로써 조절이 가능하며, 적온 범위 내에서 일평균 온도를 증가시킴으로써 화아 분화를 촉진시킬 수 있다고 판단된다.

• 한국작물학회지
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• 제41권3호
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• pp.318-331
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• 1996

밀과 보리에 있어서 종자크기와 질소영양이 수분리용효율과 탄소동위원소차별에 미치는 영 향을 조사하여 탄소동위원소차별, 수분이용효율, 질소영양간의 상호작용를 구명하고저 종자크기가 영과당 각각 44mg과 22mg인 춘파형 밀과 보리 한 품종을 직경이 15.3cm인 폿트에서 2본씩 재식, m$^2$당 질소 10g과 32g 비율로 시용하여 수분이용효율에 관련된 형질과 탄소동위원소차별을 조사하였다. 두 종자크기와 두 질소 시비량을 평균한 건물중은 절간신장기에는 보리가 밀보다 105% 컸던 반면 개화기에는 보리보다 출수가 3일 늦은 밀이 보리보다 16% 많았다. 절간신장기과 개화기에 있어서 보리에 비하여 밀에서 건물중에 미치는 대립종자의 영향이 컸었다. 다질소구가 소질소구에 비하여 개화기에 있어서 밀과 보리의 건물중이 각각 40%와 31% 높았다. 절간신장기와 개화기에 있어서 수분이용효율은 보리가 밀보다 각각 35%와 20% 많았고, 지상부의 탄소동위원소차별은 밀보다 보리가 생육기와 식물체 부위에 따라 2.0~3.6% 적었다. 종자크기가 수분이용효율에 미치는 영향은 뚜렷한 경향이 없었고 탄소동위원소차별에도 유의한 영향을 주지 않았다. 절간신장기에 있어서 수분이용효율은 질소영양에 의하여 영향을 받지 않았으나 개화기에 있어서는 소질소구에 비하여 다질소구에서 밀과 보리가 각각 2%와 7% 컸었다. 두 맥종과 두 종자크기를 평균한 탄소동위원소차별은 생육시기에 관계없이 다질소구에서 소질소구보다 약 2.5% 낮았다. 탄소동위원소차별은 절간신장기에는 수분이용효율과 유의한 상관관계가 없었으나 개화기에 있어서는 부의 상관이 있었다.

• Plant Resources
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• 제7권1호
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• pp.77-86
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• 2004

The reduced ratio of red:far-red (R:FR) light acts as a measure of the proximity of competitors and plants can detect the potentially competing neighbor plants by perceiving reflected R:FR signals and initiate the response of “shade avoidance” before actual shading occurs. The phytochrome system is responsible for monitoring the changes in the R:FR and initiating the shade avoidance response. The response to low R:FR ratio was studied in a white aspen Populus alba clone ‘Bolleana’ using two filter systems: a clear plastic filter system that allows a R:FR ratio less than 1.0 to pass from adjacent border plant reflection; and a special commercial plastic that blocks FR light and creates a R:FR ratio above 3.0. The reduced R:FR signals enhanced the stem elongation in response to competition at the expense of relative stem diameter growth. Trees grown inside clear chambers were 27 ％ taller than trees grown inside the FR-blocking filter chambers. Stem taper of clear chamber trees was 16％ less than the FR-blocking filter trees. Low R:FR also induced 22％ more stem dry weight and 13％ greater petiole length per leaf compared to the FR-blocking filter trees. There were no statistically significant differences in leaf area, leaf number increment, and total dry weight between the two light filter treatments.