• 제목/요약/키워드: Flowering plants

검색결과 554건 처리시간 0.03초

한라산 고산식물의 개화시기 및 화색에 관한 연구 (Flowering Season and Flower Color of the Alpine Plants in Paeknokdam, the Crater of Mt. Halla)

  • 오순자;고정군;고석찬
    • 한국자원식물학회지
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    • 제14권1호
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    • pp.1-7
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    • 2001
  • 한라산 백록담내의 고산식물 59종류를 대상으로 생활형, 화색, 개화시기, 그리고 종자의 성숙시기 등을 조사하여 화훼자원으로의 개발가능성을 조사하였다. 백록담내 고산식물의 생활형은 반지중식물이 67.8%로 대부분을 차지하여 전형적인 고산식물의 생활형 분포를 보여주고 있다. 개화는 전반적으로 7∼8월에 이루어지며, 종자는 8∼9월에 집중적으로 성숙되는 것으로 확인되었다. 한편 고산식물의 화색은 백색이 27% (16종)로 가장 많고, 백색, 청색, 황색 꽃의 출현빈도가 대체로 높게 나타났다.

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The Effect of Fluctuations in Photoperiod and Ambient Temperature on the Timing of Flowering: Time to Move on Natural Environmental Conditions

  • Song, Young Hun
    • Molecules and Cells
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    • 제39권10호
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    • pp.715-721
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    • 2016
  • Plants have become physiologically adapted to a seasonally shifting environment by evolving many sensory mechanisms. Seasonal flowering is a good example of adaptation to local environmental demands and is crucial for maximizing reproductive fitness. Photoperiod and temperature are major environmental stimuli that control flowering through expression of a floral inducer, FLOWERING LOCUS T (FT) protein. Recent discoveries made using the model plant Arabidopsis thaliana have shown that the functions of photoreceptors are essential for the timing of FT gene induction, via modulation of the transcriptional activator CONSTANS (CO) at transcriptional and post-translational levels in response to seasonal variations. The activation of FT transcription by the fine-tuned CO protein enables plants to switch from vegetative growth to flowering under inductive environmental conditions. The present review briefly summarizes our current understanding of the molecular mechanisms by which the information of environmental stimuli is sensed and transduced to trigger FT induction in leaves.

Effect of Deep Sea Water on Seed Germination, Photoperiod and Temperature on the Growth and Flowering of Buckwheat Species

  • Briatia, Xoxiong;Hong, Soon-Kwan;Sung, In-Je;Chang, Kwang-Jin;Park, Byoung-Jae;Park, Cheol-Ho
    • 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.

New records of flowering plants collected from the Phou Khao Khouay National Biodiversity Conservation Area for the flora of Laos

  • LIM, Chang-Kun;LEE, Kyoung-Eun;CHO, Hyun-Sung;SAYSAVANH, Veosavanh;WON, Hyosig
    • 식물분류학회지
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    • 제51권3호
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    • pp.305-318
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    • 2021
  • We report 14 species of flowering plants as new additions to the flora of Laos. These are Illex viridis (Aquifoliaceae), Capparis erycibe (Capparaceae), Euphorbia bokorensis (Euphorbiaceae), Exacum darae (Gentianaceae), Aeschynanthus cambodiensis (Gesneriaceae), Tetraphyllum roseum (Gesneriaceae), Utricularia gibba (Lentibulariaceae), Macrosolen brandisianus (Loranthaceae), Decaschistia siamensis (Malvaceae), Nyssa yunnanensis (Nyssaceae), Adenia penangiana var. penangiana (Passifloraceae), Pentaphylax euryoides (Pentaphylacaceae), Wikstroemia bokorensis (Thymelaeaceae), and Debregeasia wallichiana (Urticaceae). We discovered the species during a botanical survey of the Phou Khao Khouay National Biodiversity Conservation Area (PKKNBCA) of Lao PDR in 2015-2019. In addition, nine rarely collected flowering plant species in Laos are newly reported for the PKKNBCA.

The characteristics of seed production in an Adonis multiflora (Ranunculaceae) population

  • Min, Byeong-Mee
    • 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.

식물 이름에 대한 초등학생들의 인지도와 그들이 사용하는 식물 분류 기준 (Elementary School Students' Perception of the Name of Plants and Their Criteria Used in Classifying Plants)

  • 김상영;송남희
    • 한국초등과학교육학회지:초등과학교육
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    • 제26권1호
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    • pp.41-48
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    • 2007
  • The purpose of this study is to examine how many plant names elementary school children how, and what kind of criteria they use for classifying these plants. The sample involved 926 students from the 2nd, the 4th, and the 6th grades dwelling in one urban, three suburban, and six rural areas. Their level of perception on the name of plants increased in correlation to the elevation of the grade level. However, different patterns of increases were shown depending on the local environments in which they live. The most well-known plant names for students were the rose of Sharon, the rose and the pine tree. The students mostly classified the plants using the following criteria such as 'with or without flower' and 'edible or inedible' regardless as to whether they had prior loaming experience of plant classification. 65.3% of the 6th graders correctly grouped 5 kinds of plants into the flowering and the non-flowering plant categories at the 1st level of classification. However, only 17.9% and 7.7% correctly divided the flowering and the non-flowering plants into two subgroups at the 2nd level of classification respectively. Therefore, their abilities in plant classification was shown overall to be poor. The students living in suburban areas appeared to be harmonized with both the natural and urbanized surroundings and classified the plants more scientifically than those from the urban or rural areas were able to. This suggests that the conception of plant classification by children is affected by the environment in which they live. If children have more opportunities to observe plants in surroundings such as their classrooms and school gardens, it will help them to form the relevant scientific concepts as well as to correct any alternative conceptions related to classification.

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Wild edible flowering plants of the Illam Hills (Eastern Nepal) and their mode of use by the local community

  • Ghimeray, Amal Kumar;Sharma, Pankaja;Ghimire, Bimal;Lamsal, Kabir;Ghimire, Balkrishna;Cho, Dong Ha
    • 식물분류학회지
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    • 제40권1호
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    • pp.74-77
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    • 2010
  • The Illam district, situated in the extreme North Eastern part (Latitude 26.58N and 87.58E Longitude) of Nepal, is a hot spot for floral diversity. The study of wild edible plants of this region was an attempt to highlight the types of wild flowering plants found there and mode of use by the people of the Illam hills. In this respect, a survey of natural resources of some of the representative regions of the district was undertaken and more than 74 major varieties of plant species were found to be used frequently by the people of the hills. The rich diversity occurring in Dioscoriaceae, Moraceae, Rosaceae, Myrtaceae, Poaceae, Urticaceae and Arecaceae provided the wild angiospermic species commonly used by the people of the hills.

조선시대 화훼식물의 이용과 상징성에 관한 연구 (A Study on the Utilization and Symbolizes of the Joseon Dynasty Flowering Plant)

  • 김승민
    • 한국전통조경학회지
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    • 제32권2호
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    • pp.134-147
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    • 2014
  • 본 연구는 조선시대의 고문헌과 옛 그림에서 나타나는 화훼식물을 재료로 궁궐정원과 민가정원에 나타나는 지피식물의 이용특성과 상징성을 분석하였다. 이를 통해 문화재 지역 및 현대 조경공간에 활용을 위한 기초자료를 제공하는 것을 목적으로 하였으며, 결과는 다음과 같이 요약될 수 있었다. 첫째, 조선시대 고문헌과 옛 그림에서 출현한 화훼식물의 출현빈도는 매화, 연꽃, 모란, 국화, 파초, 영산홍, 장미, 진달래, 작약 등이 10회 이상으로 높은 빈도를 나타내는 것으로 조사되었으며, 다음으로 비교적 출현 빈도가 높은 식물은 치자, 석류(8회), 패랭이꽃, 포도(7회), 난초, 정향, 봉선화, 원추리, 맨드라미, 무궁화, 철쭉류, 창포, 접시꽃, 황매화, 유자(5회), 부용, 동자꽃, 금전화, 베고니아, 해바라기, 양귀비, 수선화, 서향화, 옥잠화 등(4회)이였으며, 그 외에는 29분류군 총 81종의 화훼식물이 조사되었다. 둘째, 궁궐과 민가에서 사용되었던 조선시대 화훼식물의 이용은 분에 심어 가까이 두고 완상하거나 화단, 화계, 화오, 연못 및 담장주변 등에 주로 식재하였음을 고문헌의 기록과 정원도 및 민화의 그림을 통해서 확인할 수 있었다. 그러나 영산홍의 식물재료에 대한 기록은 조선왕조실록의 내용에서 다루어지고 연구되어진 민가정원의 관련된 문헌(6점)이나 옛 그림(766점)에서 출현한 내용이 없는 것으로 보아 조선시대 대중에게 유통이 극히 일부에 국한되었던 것으로 판단된다. 셋째, 조선시대 화훼식물 상징성은 유교의 절개, 군자, 청빈, 충효사상을 나타낸 경우, 도교의 신선사상이나 불로장생을 나타내는 경우, 민간신앙의 부귀영화나 만사형통을 기원하는 경우로 구분할 수 있었다. 이는 식물을 덕성함양의 대상이나 기복의 대상으로 여겼음을 알 수 있다. 넷째, 조선시대 이용했던 화훼식물은 선비가 닮고 싶은 이상과 지향하는 정신세계와 일치하였기 때문에 선조들의 상징으로 나타났다고 본다. 조선시대 이용하였던 화훼식물은 수목종류에 따른 보편적인 판단기준이 아닌 다양하고 주관적이며, 또한 정신적인 측면으로 접근하여 해석할 때에 조선시대 화훼식물의 조경공간에서의 활용범위 또한 넓어질 것으로 사료된다.

파종기이동에 따른 결명(Cassia tora L.)의 개화의 결협특성 (Flowering and Pod Setting Characteristics of Cassia tora L. Grown under Different Planting Time)

  • 김광호;조선행
    • 한국작물학회지
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    • 제34권3호
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    • pp.246-251
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    • 1989
  • 파종기 이동에 따른 결명의 개화와 결협 특성의 변이양상을 구명하기 위하여 1986년 4월 20일부터 6월 20일까지 20일 간격으로 4회에 걸쳐 파종하여 개화 및 협발달을 중심으로 조사한 결과를 요약하면 다음과 같다. 1. 4월 20일, 5월 10일 및 5월 30일 파종구의 개화시와 개화기간은 큰 차이가 없었으나 6월 20일 파종구의 개화시는 크게 늦어졌고 개화기간도 짧아졌다. 그러나 개화종자일은 어느 파종구나 비슷한 시기였다. 2. 주당 개화수, 착협수는 파종기가 늦어짐에 따라 감소하였으나 착협율과 결협율은 4월 20일, 5월 10일 및 5월 30일 파종구간에는 차이가 없었고 6월 20일 파종구에서는 크게 떨어졌다. 3. 어느 파종구에서나 개화시 이후 4일째부터 개화최성기가 시작되고 일정한 기간동안 일별 개화수가 비슷하게 유지되다가 개화종자일에 가까워지면서 개화수가 약간씩 감소하였다. 4. 결명은 주경 및 분지의 하위절에서부터 상위절로 올라가면서 피는 무한화서를 가지고 있었으며 주경의 결협률이 분지보다 높았다. 5. 어느 파종기에서나 개화시로부터 2주째에 핀 꽃들의 착협수 및 결협수가 가장 많았으며 그 이후 개화기가 늦어질수록 착협수와 결협수가 감소하였고 9월초순 이후에 핀 꽃들은 결협으로 연결되지 못하였다. 6. 4월20일, 5월10일 및 5월30일 파종구에서는 개화시로부터 2주째에 핀 꽃에서 발달된 협의 길이, 협당 종실수 및 천입중이 최대치에 달했으며 그 이후 개화기가 늦어질수록 감소하였다. 6월 20일 파종구는 꽃이 늦게 필수록 협장, 협당 종실수 및 천입중이 감소하였다.

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Growth and Flowering Responses of Petunia to Various Artificial Light Sources with Different Light Qualities

  • Park, In Sook;Cho, Kyung Jin;Kim, Jiseon;Cho, Ji Yoon;Lim, Tae Jo;Oh, Wook
    • 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.