• 제목/요약/키워드: Rhododendron native to China

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Chemotaxonomic Significance of Taxifolin-3-O-arabinopyranoside in Chinese Rhododendron genus

  • Tae Hee Kim;Hyeon Du Jang;Ye Ji Kim;Ye Eun Kwon;Sun Min Park;Min Seok Kim;Chan Ho Lee;Sun Eun Choi
    • Journal of Forest and Environmental Science
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    • 제40권2호
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    • pp.123-140
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    • 2024
  • More than half of the global distribution of the Rhododendron genus is found in China, with over 74% being endemic species. However, there is still insufficient data to chemically classify the Rhododendron genus native to China. Therefore, in this study, a chemotaxonomic study was conducted to determine the presence of taxifolin-3-O-arabinopyranoside, a flavonoid compound, in the Rhododendron genus native to China. Forty-three species of Rhododendron native to China-20 from across China, 8 from Beijing, 6 from Yanbian, and 9 from Yunnan-were utilized in the experiment. Through HPLC analysis, the retention time was compared with that of taxifolin-3-O-arabinopyranoside, a standard compound, and quantitative analysis was conducted. As a result, taxifolin-3-O-arabinopyranoside was detected in 22 out of 43 the Chinese Rhododendron species. Afterwards, LC-MS/MS analysis was performed on the 22 species in which taxifolin-3-O-arabinopyranoside was detected to determine whether the molecular weight was consistent with the standard compound. Under negative conditions, it was confirmed that all samples exhibited the same molecular weight as taxifolin-3-O-arabinopyranoside, 435-436 m/z. The same compound was detected in more than half of the Rhododendron species used in the experiment, and taxifolin-3-O-arabinopyranoside was determined to be an indicator compound for Rhododendron species native to China. In addition, the possibility of using the above results as basic data for chemical classification of Chinese Rhododendron genus was confirmed.

고속도로 절토비탈면의 식생구조와 천이 (Vegetation Structure and Succession of Highway Cutting-slope Area)

  • 송호경;전기성;이상화;김남춘;박관수;이병준
    • 한국환경복원기술학회지
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    • 제8권6호
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    • pp.69-79
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    • 2005
  • This study was carried out to select proper species for early stage replantation in highway cut-slope area. In highway cut-slope area, sample plots of 106 were selected, and their vegetations and environmental factors were investigated. 1. We found total 172 species in the 106 cutting area of highway. The species of high frequency of highway cut-slope were found in the order of Lespedeza bicolor, Artemisia princeps var. orientalis, Festuca arundinacea, Erigeron annuus, Lespedeza cuneata, Lactuca indica var. laciniata, Eragrostis curvula, Dactylis glomerata, Oenothera lamarckiana, Wistaria floribunda, Humulus japonica, Commelina communis, Miscanthus sinensis, Pueraria thunbergiana, Pinus densiflora, etc. 2. The average vegetation coverage was over 90% in the study sites and the average coverage was 91.4% in the total cut-slope area. The species of high coverage of highway cut-slope area were found in the order of Festuca arundinacea, Eragrostis curvula, Lespedeza bicolor, Wistaria floribunda, Lespedeza cuneata, Dactylis glomerata, Artemisia princeps var. orientalis, Humulus japonica, Pueraria thunbergiana, Robinia pseudoacacia, Poa pratensis, Medicago sativa, Festuca ovina, Pinus densiflora, Parthenocissua tricuspidata, etc. 3. The total coverage in the foreign plants of Festuca arundinacea, Eragrostis curvula, Dactylis glomerata, Poa pratensis, Medicago sativa, Coreopsis drummondii and native plants of Lespedeza bicolor, Wistaria floribunda, Lespedeza cuneata, Amorpha fruticosa, Indigofera pseudotinctoria, Lespedeza cyrtobotrya were 57.52%. That is, the ecological succession of native herbs and parachute shrubs have delayed because the afforested plants occupy 57.52%. In future, the coverage of foreign herbs have to reduce, and the coverage of the native herbs and parachute shrubs must be increased. 4. The native seed of Artemisia sp., Miscanthus sinensis, Smilax china, Pueraria thunbergiana, Rubus crataegifolius, Rubus parvifolius, Pinus densiflora, Rhus chinensis, Albizzia julibrissin, Rhododendron mucronulatum, Clematis apiifolia, Zanthoxylum schinifolium, Prunus sargentii could be added in the seedling of the temperate south zone highway with the used seeds. The native seed of Artemisia sp., Miscanthus sinensis, Rubus crataegifolius, Rhododendron mucronulatum, Weigela subsessilis, Stephanandra incisa, Rhus chinensis, Pinus densiflora, Salix koreensis, Cocculus trilobus, Populus alba, Spiraea prunifolia for. simpliciflora, Clematis apiifolia, Lindera obtusiloba, Quercus serrata, etc., could be added in the seedling of the temperate middle zone highway with the used seeds. 5. We have some recommendation. The native plants have to growth in the highway cut-slope area instead of foreign plants to have good environmental ecology. The role of the foreign plants should be the plant for the initial several years in the highway cut-slope area. And, the native plants should growth in the next season. 6. We should protect shrubs and trees in the highway slope area because shrubs and trees can be more helpful in stabilizing of the slope area than herbs.

비슬산 군립공원의 진달래에 대한 박테리아 군집 metagenomics 분석 규명 (Metagenomic Analysis of Bacterial Communities in Rhododendron mucronulatum in Biseul Mountain County Park, Daegu, Korea)

  • 최두호;정민지;권해준;김미경;김동현;김영국;김종국
    • 생명과학회지
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    • 제30권1호
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    • pp.32-39
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    • 2020
  • 한국, 몽골, 러시아, 중국 북반부에 서식하는 진달래는 예로부터 약재뿐 만이 아니라 관광 자원으로써도 잘 알려져 왔다. 이중 한국의 대구에 위치한 비슬산 군립공원 또한 진달래 관광지로 유명하다. 이러한 환경에서 진달래와 흙에 존재하는 미생물 군집 간의 관계를 조사하기 위해서, 2월과 8월에 걸쳐 군립공원 내 3 곳을 선택하여 실험을 진행하였다. 박테리아 군집 조사를 위해 확보된 흙들은 pyrosequencing 과정을 거쳤으며 총 404,899개의 sequencing reads를 확보하였다. 두 날씨에 따라 각기 다른 3 곳의 채집 장소로부터 operational taxonomic units (OTUs) 값이 측정되었으며 이는 2,349에서 4,736 수치를 보였다. OTUs 값 측정결과 채집 장소 중에서는 군립공원 입구 지역에서 가장 높은 값을 보였으며 계절로는 8월이 2월보다 높은 수치를 보였다. 반면 가장 낮은 수치의 OTUs 값을 보인 샘플은 제 2 관측지점, 특히 2월에 채집한 흙이었다. 또한 Chao1과 Sannon index 값 측정 결과, 8월에 채집한 군립공원 입구에서 유래한 샘플에서 가장 높은 생물 풍부도와 다양성 수치를 보였다. 연구를 통해, 6 샘플로부터 유래한 박테리아 군집은 비슬산 군립공원에서만 발견되는 45개의 속과 287개의 종으로 구성된 공통의 조성을 보였다. 이 발견된 공통 박테리아들은 진달래 군집 생성에 영향을 끼칠 것으로 기대되고 있다.