• Animal cells and systems
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• 제8권4호
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• pp.289-294
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• 2004

Bupleurum latissimum is a narrowly endemic and endangered plant, restricted to only two small populations on steep cliffs of a small island, Ulleung Island, in Korea. The genetic diversity and population differentiation in the two remnant populations of the species were investigated using RAPD (random amplified polymorphic DNA) analysis. The Neis gene diversities were 0.146 in the smaller population of 45 individuals, and 0.151 in the larger population of 61 individuals. The genetic variation was not significantly different between these two populations. Genetic diversity within populations was not low considering the very small size of populations. Analysis of molecular variance (AMOVA) revealed higher variation within populations (65.9%) than genetic differentiation between them (34.1%). B. latissimum revealed higher population differentiation than other outbreeding species. The differentiation of the populations corresponded to low gene flow (Nem = 0.482). The cluster and principal coordination analyses provide strong support for high population differentiation, showing that all individuals of the two populations have built up population-specific clusters. Although gene flow between the two populations of B. latissimum was limited, they have preserved relatively high levels of genetic variation.

• 한국자원식물학회지
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• 제32권1호
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• pp.86-107
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• 2019

본 연구는 전라남도 여수시 돌산읍에 위치하는 돌산도의 관속식물상을 조사하고 분포가 확인된 주요 식물에 대해 논의하였다. 현지조사는 2017년부터 2018년까지 총 15회에 걸쳐 수행되었으며, 이에 대한 증거표본은 국립수목원 산림생물표본관(KH)에 소장하였다. 분포가 확인된 관속식물은 113과 338속 517종 1아종 49변종 3품종 총 570분류군이다. 이중 한국특산식물은 개족도리풀 등 18분류군을 확인되었으며, 환경부지정 식물구계학적특정식물종은 V-I등급으로 총 90분류군이 조사되었다. 희귀식물은 위기종(EN)인 백양꽃1분류군을 포함하여 총 4분류군이며, 적색목록에 속하는 관속식물은 취약종(VU) 갯취 등 총 8분류군이다.

• Ocean and Polar Research
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• 제46권2호
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• pp.123-129
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• 2024

Melosira octogona Schmidt has been documented primarily through illustrations and light microscopy photographs, resulting in incomplete morphological descriptions. In this study, the morphological characteristics of M. octogona were investigated using scanning electron microscopy, and the small subunit rDNA of the strain isolated from the coast of Jeju Island, South Korea, was analyzed for the first time. The cells were organized in short chains, with the frustules taking on an octagonal shape in the girdle view because of the straight, obliquely oriented valve margin. The cells were joined together in specific pairs by a cingulum. Imaging analysis via SEM revealed the presence of a hemispherical valve with a well-developed corona on the valve face, along with stellate thickening and rimoportulae. The epicingulum was composed of six ligulate bands punctuated by rows of circular to elongated pores. Genetic analysis of the 18S rDNA sequence suggested a close relationship between M. octogona and Melosira sp. (KJ961704), demonstrating a high degree of similarity. Meanwhile, it exhibited comparatively low similarity (99.0 %) to Melosira cf. octogona (AY485518). The results of our analysis can enhance the precise recognition of M. octogona and enrich our understanding of its phylogenetic position within the order Melosirales.

• 대한화학회지
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• 제67권2호
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• pp.150-155
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• 2023

Eurya emarginata is an evergreen tree growing in the southern regions of Korea including Jeju Island. In this study, antioxidant and anti-photoaging effects were investigated with the extracts of E. emarginata leaves. As comparative studies with the extract and five solvent fractions, the EtOAc fraction showed the most effective DPPH and ABTS⁺ radical scavenging activities. The EtOAc fraction also inhibited matrix metalloproteinase-1 (MMP-1) production most effectively. Phytochemical study on the EtOAC fraction resulted in the isolation of three compounds; eutigoside C (1), eutigoside B (2) and quercitrin (3). Among the isolates (1-3), quercitrin (3) showed excellent antioxidant activities and inhibitory properties on MMP-1 production. Based on these results, it was suggested that extracts of E. emarginata leaves could be developed as natural anti-photoaging agents in cosmetic formulations.

• 한국자원식물학회지
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• 제25권1호
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• pp.31-47
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• 2012

본 연구는 2008년과 2010년에 걸쳐 3차례 식물상을 조사하였으며, 전체 조사된 분류군은 90과 269속 351종 3아종 43변종 6품종등 403분류군이 확인되었다. 주요 식물들로 특산식물이 서울제비꽃 등 2분류군이 확인되었고, 산림청지정 희귀 및 멸종위기 식물이 대청부채(CR) 등 8분류군, 환경부 지정 특정식물은 금방망이(V) 등 35분류군으로 나타났다. 또한 식물지리학적 분포특성에 있어 남방계 식물과 북방계식물이 함께 확인되었다. 귀화식물은 대청가시풀 등 40분류군이 확인되었으며, 한반도 미기록종인 대청지치가 새로이 발견되었다.

• Journal of Ecology and Environment
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• 제33권2호
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• pp.95-103
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• 2010

The archipelago in the southwest sea, Korea, was registered as Shinan Dadohae Biosphere Reserve by United Nations Educational, Scientific and Cultural Organization Man and the Biosphere (UNESCO MAB) on May 26, 2009. This study was conducted to determine a method of reconciling natural and anthropogenic processes and to enable sustainable development in the vicinity of the Shinan Dadohae Biosphere Reserve (SDBR). To accomplish this, the characteristics of SDBR with respect to biodiversity and cultural diversity were evaluated. In addition, a management plan regarding the wise use of the SDBR was developed while focusing on four parts: cultural support to induce motivation for native conservation and development; development and specification of fisheries and cultivation based on local community systems; restructuring of marine food products and resource transporting systems; activation and discovery of indigenous knowledge to enable networking between local residents, academia and the UNESCO-international society.

• 식물분류학회지
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• 제51권1호
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• pp.10-17
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• 2021

Invasive alien species management is pivotal for biodiversity conservation. Commelina caroliniana Walter, from the family Commelinaceae, is an alien plant native to the Himalayas and India, but it has been widely introduced around the world, including in the United States, Brazil, Philippines, and Japan. In Korea, the first population was found growing adjacent to agricultural land and farm roads on Jejudo Island, and field observations confirmed the presence of at least nine populations there. It is similar morphologically to C. diffusa Burm. f. but can be distinguished by involucral bracts that are ciliate at the base, hairs on the peduncle and obsolete upper cincinnus, brown spots on its 4-lobed antherode, and seed surfaces that are smooth to slightly alveolate. It was determined to have an invasiveness low score of 8 according to the Korean 'Invasive Alien Plant Risk Assessment', suggesting that it may spread to natural habitats. Although the current distribution of C. caroliniana is restricted to Jeju-si, it has spread dramatically in many other areas of the world. At present, it has had a limited impact on the local environment, but local and regulatory authorities should pay close attention to this plant and take measures to prevent its expansion in the future.

• 한국자원식물학회지
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• 제30권4호
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• pp.410-426
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• 2017

충청남도 태안군에 위치한 안면도에 대한 식물상을 파악하기 위하여 2015년 6월부터 2016년 10월까지 현지조사를 수행하였다. 현지조사를 통해 확보된 석엽표본을 바탕으로 안면도의 관속식물 119과 400속 632종 5아종 73변종 7품종 등 총 717분류군이 확인되었다. 확인된 관속식물 중, IUCN 평가기준에 따른 산림청 지정 희귀식물은 멸종위기종(CR) 3분류군, 위기종(EN) 1분류군, 약관심종(LC) 6분류군, 취약종(VU) 7분류군 총 17분류군이 확인되었다. 식물구계학적 특정식물은 V등급에 먹넌출, 초종용 등 5분류군, IV등급에 맥문아재비, 왕김의털 등 13분류군, III등급에 모감주나무, 병풀 등 30분류군을 포함하여 총 99분류군이 확인되었다. 조사지역내에서 특산식물은 개나리와 태안원추리등의 6분류군이 확인되었으며, 귀화식물은 애기수영, 개비름, 백령풀 등을 포함한 91분류군이 확인되었다.

• 한국해양바이오학회지
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• 제8권1호
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• pp.30-38
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• 2016

The objective of this study was to investigate the useful components and potential antioxidant activities of 30 marine algae, collected from Jeju Island in Korea. The contents of bioacitve substance of extracts from marine algae, such total polyphenol and carbohydrate, were determined. The extract of Distromium decumbens had the highest amount of total polyphenol content (21.27%), and that of Gracilaria incurvata Okamura had the highest amount of total carbohydrate content (10.18%). The antioxidant activities of extracts obtained from algae were tested through the evaluation of DPPH radical and hydroxyl radical scavenging activity. The extracts of Distromium decumbens, Sargassum hemiphyllum (Turner) C.Agardh, Sargassum serratifolium (C. Agardh) C. Agardh and Acrosorium yendoi Yamada were found to have more than 80% DPPH radical scavenging activity and that of Dictyota okamurae (Dawson) $H{\ddot{o}}tning$, Schnetter, et Prud'homme van Reine, Myagropsis myagroides (Martens ex Turner) Fensholt, Sargassum serratifolium (C. Agardh) C. Agardh and Cladophora wrightiana Harvey showed more than 50% hydroxyl radical scavenging activity. These results suggest that algae collected from Jeju Island would be good raw materials for antioxidant.

• 한국자원식물학회지
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• 제27권5호
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• pp.485-500
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• 2014

본 연구는 전라남도 고흥군 외나로도 지역에 대하여 기 확보된 표본과 2011년 현장조사를 바탕으로, 관속식물 분포를 조사하였다. 전체 관속식물은 117과 342속 503종 2아종 62변종 7품종으로 총 574분류군이 확인되었다. 주요내용으로 희귀식물은 8분류군이 확인되었으며, 특산식물은 6분류군이 확인되었다. 환경부 지정 특정식물은 101분류군이 확인되었으며, 귀화식물은 46분류군이 확인되었다. 산림청이 지정한 특별산림보호대상종은 1분류군이다. 그밖에 식물자원은 513분류군이 밝혀졌으며, 그 중 182분류군이 두 가지 이상의 활용성이 기대되는 것으로 나타났다.