• BMB Reports
• /
• 제43권1호
• /
• pp.34-39
• /
• 2010

Expression patterns of OsAREB1 revealed that expression of OsAREB1 gene can be induced by ABA, PEG and heat. Yeast one-hybrid assay demonstrated it can bind to ABA-responsive element (ABRE), which was found in most stress-induced genes. Transgenic Arabidopsis over-expressing OsAREB1 had different responses to ABA and glucose compared to wild-type plants, which suggest OsAREB1 might have a crucial role in these two signaling pathways. Further analysis indicate that OsAREB1 have multiple functions in Arabidopsis. First, OsAREB1 transgenic plants had higher resistance to drought and heat, and OsAREB1 up-regulated the ABA/stress related gene such as RD29A and RD29B. Second, it delayed plant flowering time by down-regulating the expression of flowering-related genes, such as FT, SOC1, LFY and AP1. Due to the dates, OsAREB1 may function as a positive regulator in drought/heat stresses response, but a negative regulator in flowering time in Arabidopsis.

• The Korean Journal of Ecology
• /
• 제8권1호
• /
• pp.53-59
• /
• 1985

Phenological development, flowering and leafin times of Rhododendron muronulatum and R. schlippenbachii along elevagtion were studied at Mt. Kwanak, 629m high above the sea level, in Seoul. Flowering and leafing time of the former were delayed at the rate of 2.3~3.3 days and those of the latter were of 2.0~3.0 days per 100m ascent. Phenological changes of both plant species were closely correlated with minimum air temperature first, and then soil water content and minimum soil temperature among the climatic factors. Phenological difference caused by altitude and slope direction(southeast-northwest) among the topographic factors was admitted at the high significance level, but the difference by ridgevalley was little.

• 농업생명과학연구
• /
• 제45권1호
• /
• pp.49-58
• /
• 2011

본 연구는 밤나무 품종개량을 위한 기초자료를 제공하기 위하여 남부지방에서 재배되고 있는 31품종의 개엽 및 개화특성을 조사하였다. 개엽시기는 품종 간에 약간의 차이가 있었으며, 2008년과 2009년에 비해 2010년에 늦게 개엽되었다. 개엽 1단계부터 4단계까지 소요되는 기간은 2008년과 2009년은 약 8일 정도였지만, 2010년에는 약 14일 정도가 소요되었다. 개화특성에 있어서 2008년과 2009년의 경우, 암꽃의 개화개시와 개화완료는 각각 5월 초순과 6월 초순이었으나 2010년에는 늦은 개화개시와 개화완료를 나타내었다. 개화특성에 있어서는 수꽃도 암꽃과 동일한 경향이었으나, 개화개시는 수꽃이 암꽃보다 20일 정도 빠르게 나타났다.

• Current Research on Agriculture and Life Sciences
• /
• 제22권
• /
• pp.1-12
• /
• 2004

Pod-edible bean or snap bean is a fairly new crop to domestic farmers but the national demand is steadily increasing in recent years along with the development of western food business and change in dietary patterns. At the same time, much efforts are being made to export it to foreign country, mainly to Japan. The amount of seeds introduced from outside is also continuously increasing along with the enlargement of area planted for the crop. Hybridization breeding for the crop has already been started to supply the cheaper and better seeds which will reduce the seed costs and foster the higher income to the farmers. In this experiment, several technologies related with the production of quality seeds are preliminary investigated. Some of the results obtained are summarized as follows; 1. Highly significant interaction was recognized between planting dates and no. of pods per plant and no. of branches but no interaction between planting dates and plant height and no. of nodes on main stem. Days to maturity was proportionally reduced to later planting dates. 2. Rate of viviparous pods and seeds was gradually increased in later planting dates but rate of germination was increased in earlier planting dates with lower germination rate in white seed coat grains than in colored seed ones. 3. Seed yield was higher in the earlier planting dates with a great deal of varietal difference. Early to mid April was considered to he the optimum planting dates for snap bean in Kyungbuk area. High correlation was recognized between seed yield and no. of pods per plant, no. of seeds per plant, and 100 seed weight. 4. Days to flowering was three and seven days longer in Cheongsong, high mountainous area than in Kunwi, somewhat prairie lowland. One hundred seed weight was also higher in Cheongsong than in Kunwi. Rate of viviparous grains, pods, and decayed seeds was higher in Cheongsong but, at the same time, the rate of germination and seed yield was also higher in Cheongsong. 5. One hundred seed weight of KLG5007 increased continuously up to 35days after flowering and decreased thereafter but that of KLG50027 increased to 40days after flowering and slowly reduced thereafter. The content of crude oil reached to maximum at 40 days after flowering and reduced thereafter. The rate of germination in Gangnangkong 1 was the highest, 89.3%, at 35 days after flowering and reduced thereafter while that in KLG50027 reached to maximum, 70.7%. at 40days after flowering and reduced thereafter. Thus, the optimum harvesting time for snap bean was considered to be 35~40days after flowering. 6. The snap bean pods at yellow bean stage easily became viviparous ones under saturated moisture conditions for 24 hours at $25{\sim}30^{\circ}C$. Therefore, it is recommended to harvest pods somewhat earlier than yellow-bean stage and let them do post maturing, especially when it is to be rained.

• 한국작물학회:학술대회논문집
• /
• 한국작물학회 2017년도 9th Asian Crop Science Association conference
• /
• pp.83-83
• /
• 2017

The National Agrobiodiversity Center (NAS, RDA, Republic of Korea) has continually collected new valuable genetic resources. In this study, we regenerated conserved kidney bean (Phaseolus vulgaris L.) germplasm which couldn't be available because of seed quantity and quality, and we also surveyed their morphological characters for the sustainable utilization. A total of 431 kidney bean accessions were regenerated and 18 morphological traits were surveyed according to the characterization guideline of RDA Genebank. Among the surveyed traits, flowering time ranged from May 23 to September 4 and 73.8% of tested accessions were mainly flowering in June. The maturity time ranged from July 1 to October 15 and main flowering time was July (91.4%). For plant type, 270 accs (62.6%) were climbing type followed by medium type of 86 accs (20.0%) and dwarf type of 65 accs (15.1%). The seed coat colors were various; yellow (34.6%), white (22.3%), brown (17.9%), red (10.7%), black (5.8%), violet (11%), pink (1.4%), navy (0.9%). Principal component analysis indicated that five principal components (PCs) with Eigen values >1 accounted for more than 65.8% variability. The first PC was more related to growth habits such as growth type, flowering time, and plant type. The second and third PCs showed higher values of the pigment characters such as seed coat color, flower color, and pod color. In fourth and fifty PCs, there were the higher positive values of the pod shapes. Our results provided insight into the characteristics kidney beans, thus the utilization basis of kidney beans might be elevated for bio-industry.

• 한국작물학회지
• /
• 제37권4호
• /
• pp.347-354
• /
• 1992

땅콩은 고온성 작물로 우리나라 환경에서는 생육일수 부족과 등숙기간의 저온 등 부적당한 환경조건 때문에 저위생산을 면치 못하고 있을 뿐 아니라 재배품종의 적정 수확기 판단이 어려워 과숙협, 탈협 둥으로 인한 수량감소는 물론, 수확기에 노력의 소모가 지대하여 개화후 경과일수별로 수확, 수양구성형질을 조사하므로서 충북지방의 땅콩 적정 수확시기 결정에 필요한 기초자료를 얻고자 하였으며 그 시험결과를 요약하면 다음과같다. 1. 비닐피복재배는 자방병의 수를 유의성 있게 증가시켰으며 개화후 일수가 경과 할수록 자방병의 수는 감소하였다. 2. 착협수는 피복재배에서 현저히 증가하였고 수확시기에 따른 차이에도 고도의 유의성이 있었으며 새들땅콩은 개화 후 100일까지, 영호땅콩은 개화후 110일까지 증가하다가 이후부터 감소하였다. 3. 협실비율과 완숙입률은 비닐 피복재배에 의해 현저히 증가되었고 개화 후 일수가 경과 할수록 증가되는 경향이었다. 4. 과숙협률과 탈협률은 비닐 피복재배와 무피복재배간에 유의적 차이가 없었으나 개화후 일수가 경과 할수록 증가하여 새들땅콩은 110일부터, 영호땅콩은 120일부터 급격히 증가하였다. 5. 비닐 피복재배에 의한 100립중 증가는 통계적 유의성이 없었으나 종실수량은 고도의 유의성이 있었으며 새들땅콩은 100일 수확기, 영호땅콩은 110일 수확기에 최고 수량을 보였다. 6. 종실수량과 자방병수와는 유의한 부의 상관이 있었으며 협수, 협실비율, 탈협률, 100립중과는 유의상관이 있었다.

• 한국작물학회지
• /
• 제32권2호
• /
• pp.188-195
• /
• 1987

입당호밀, 두루호밀, 신기호밀(트리티케일), 그루밀, 메귀리 등 5개 품종에 대하여 미성숙종자의 초기 생육(27일간)을 조사하기 위하여 1985년 10월부터 1987년 2월까지 수원지방에서 행한 시험결과를 요약하면 다음과 같다. 1. 미성숙 종자의 천립중은 성숙기까지 계속 증가를 나타냈는데 (r=0.9000 이상), 입당호밀과 두루호밀은 개화후 35 일 (각각 6월 19일, 6월 24 일), 신기호밀, 그루밀, 메귀리 등은 개화후 30일 (각각 6월 29일, 6월 19일, 7월 9 일)에 천립중이 거의 최대에 달하였다. 2. 미성숙 종자의 발아율은 종자의 천립중 증가와는 상관이 높지 않았으며, 메귀리에서 개화후 5일에 49 %의 발아를 보였고 개화후 10 일부터는 94% 이상을 보였다. 기타 품종들도 어느 일정 시기이후에는 90％ 이상의 높은 발아율을 보였다. 3. 미성숙 종자에서 생육한 개체의 초장은 종실의 천립중과 고도의 정의 상관을 보였지만 신기호밀과 메귀리에서 개화후 20 일, 25 일, 30 일 (성숙기)에 수확한 종자의 유식물체간에 그루밀에서는 개화후 25일, 30 일 (성숙기) 간에 차이가 적었다. 4. 미성숙 종자에서 온 유식물체의 생체중과 건물중은 종실의 천립중과 고도의 정의 상관을 보였으나 신기호밀, 그루밀, 메귀리 등에서 개화후 25 일이나 30일에 수확한 종자의 유식물체들 간에 차이가 적었다. 5. 수원지방에서 청예용 종자로서 사용할 경우 입당호밀과 두루호밀은 개화후 35 일 (각각 6월 19일, 6월 24 일 ) 신기호밀, 그루밀, 메귀리 등은 개화후 25 일 (각각 6월 24 일, 6월 14 일, 7월 4 일) 에 수확하여도 청예수량이 크게 감소되지 않을 것으로 보인다.

• Animal cells and systems
• /
• 제2권1호
• /
• pp.55-63
• /
• 1998

The effects of inflorescence herbivory and flowering time on plant architecture and reproductive yields were examined with a perennial herbacious species, Vicia cracca, occurring in Natick, Massachusetts, USA. Natural herbivory on inflorescences was observed among the total of 157 plants during a growing season. Vegetative and reproductive characters were measured in the field as well as in the lab depending on the characters. Approximately 64% of the plants were subjected to herbivory on inflorescences. Plants were classified into three groups; unbrowsed plants, partially browsed, and totally browsed plants, according to the level of herbivory on inflorescences of each plant. Plants were also categorized by their flowering time such as early vs late flowering plants. Herbivores tended to favor inflorescences on rather small plants, resulting in a pattern of totally contact or partially intact inflorescences on taller plants. The mean number of stems, which was assumed to be a direct result of severe herbivory in this population, differed among herbivory groups. There also was a tendency that plants flowering late in the season had more nodes with more leaves, suggesting that herbivory on stem tips early in the season before flowering might have induced growth of side branches or branchlets along the main stems. Comparison between unbrowsed and partially browsed plants showed that the latter compensated for browsing in terms of numbers of inflorescences, fruits, seeds and seed size (weight), though they did not compensate in flower number. The probability of fruit production (presence vs absence of fruits) and seed weight declined toward the end of the season. These results suggest that resources are deficient at the end of the season. Almost complete reproductive failure in totally browsed plants is attributed to the destruction of inflorescence display and the disadvantage of small vegetative size of those plants. After all, in this population, a moderate level of herbivory on inflorescences did not reduce the maternal fitness of the plants. However, severe herbivory on inflorescences resulted in antagonistic interactions between plants and herbivores.

• 한국환경과학회지
• /
• 제23권9호
• /
• pp.1573-1581
• /
• 2014

This study was conducted to examine the effect of LED light quality and supplemental LED light on growth and flowering for potted flowering plant of Kalanchoe. 1. Plant height of Kalanchoe was enhanced under Red, regardless of treatment time. 2. Root length and stem diameter of Kalanchoe were enhanced by Red+Blue. 3. The number of internodes was not influenced by LED light quality. Length of flower stalk of Kalanchoe increased under Red+Blue, but treatment time did not result in statistically significant differences. 4. Leaf area was not influenced by LED light quality in Kalanchoe. 5. The number of flower buds and open flowers was decreased by LED light treatment, but days to flowering was reduced by Red+Blue for 4 hr after sunset in Kalanchoe. 6. Chlorophyll and anthocyanin content was not significantly affected by LED light treatment, but anthocyanin content tended to increase by Blue 4 hr after sunset. 7. Fresh and dry weight did not increased by LED light treatment in Kalanchoe.

• 한국작물학회지
• /
• 제45권3호
• /
• pp.171-175
• /
• 2000

황기의 개화, 결실 및 수분양식을 구명하여 품종육성의 기초자료를 얻고자 시기별 개화.결실 특성 및 수분방법별 결실율에 대한 시험을 수행하였던 바 다음과 같은 결과를 얻었다. 1. 황기의 개화는 원줄기의 20-22절위에서 첫 꽃이 피기 시작하여 분지 발생순으로 개화되며 7월 중.하순경에 개화하기 시작하적 10월 중.하순까지 계속 관화되는 무한화서이다. 2. 개화시기별로는 9월 상순에 개화한 화경수가 가장 많아 꼬투리 및 종실 수도 9월 상순에 개화한 화경에서 가장 많은 경향이었다. 3. 소화가 착생되는 부위의 길이는 6.6-7.3cm, 소화수는 화경당 13-17화, 착협률은 30-45%, 협당 종실수는 4.8-5.3위 정도였다. 4. 꼬투리는 수분 후 30일 경에 길이가 3.8cm로 최대에 달하며, 폭은 8mm정도이고 종실수는 7.3개정도 형성되었다. 5. 황기 꽃의 수분양식은 봉지 씌우기로 자가 수정시키는 경우 거의 결실되지 않았고, 인공수분에 의한 결실율은 7월 하순부터 8월 하순까지는 5%이하였으나 9월 상순 이후부터는 13%이상으로 높아지는 경향이며 타가수분을 하는 것으로 나타났다.