• Korean Journal of Plant Resources
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• v.27 no.2
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• pp.133-154
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• 2014

We investigated the flora of Yeoseo-do (N $33^{\circ}58^{\prime}$, E $126^{\circ}55^{\prime}$), located in Wando-gun, Jeollanam-do, South Korea and discussed the vascular plants found there. Four separate field trips were completed from April to October of 2013. The vascular plants were summarized as 463 taxa; 112 families, 306 genera, 409 species, 6 subspecies, 42 varieties, 5 forms and 1 hybrids. The number of endemic species of Korea were 6 taxa, and 12 taxa designated by the Ministry of Environment as red data of endangered vascular plants were investigated in this region. There were a total of 98 taxa of floristic regional indicator plants and one taxon of level I endangered species, Neofinetia falcata (Thunb.) Hu, as designated by the Ministry of Environment. 33 taxa have shown their southern distributional limit ranges, and 10 taxa of halophytes were confirmed in the Yeoseo-do (Isl.). In additon, 27 taxa of the naturalized plants were recorded.

• Proceedings of the Plant Resources Society of Korea Conference
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• 2002.11b
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• pp.27-27
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• 2002

식용피(Echinochloa crus-galli var. formosensis Ohwi.) 유묘에 대한 생육저해 정도를 지표로 하여 경북 북부지방에 자생하는 10여종의 야생식물의 부위별 MeOH 추출물을 조사한 결과, 1,000 ppm에서 가죽나무(가지)및 할미꽃(경엽부)은 식용피 유묘의 뿌리의 생육을 약 60∼80% 억제시키는 것으로 나타났다. 식물생장억제활성이 나타난 상기 2종에 대해 각종 크로마토그래피법을 적용하여 활성의 본체를 분리ㆍ정제한 결과, 가죽나무 가지 및 할미꽂 경엽부로부터 500 ppm에서 식용피 유묘 뿌리의 생육을 각각 96%와 73% 억제하는 활성분획들이 획득되었으며, GC/MS 분석을 통해 이들 활성분획으로부터 수종의 식물생장억제활성물질들이 확인되었다.

• Korean Journal of Plant Resources
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• v.35 no.1
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• pp.44-70
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• 2022

This study was carried out to investigate the distribution and characteristics of vascular plants resources in Palbongsan Mt., to compare with previous study and to provide basic information for management and preservation of vegetation. We surveyed eleven times by dividing routes from April of 2018 to May of 2021. The result of this survey revealed a total of 450 taxa, consisting of 101 families, 298 genera, 405 species, 11 subspecies, 28 varieties and 6 forms. Among them, the Korean endemic plants were 8 taxa and the rare plants were 4 taxa. The floristic target species were 30 taxa including 2 taxa of grade IV, 6 taxa of grade III, 7 taxa of grade II, and 15 taxa of grade I. The naturalized plants were 39 taxa, the percent of naturalized plant species was calculated to be 8.67% and urbanization index was 12.15%. Ecosystem disturbance wild plants were 5 taxa. It is considered continuous monitoring and periodic vegetation management of the distribution status of naturalized plants and ecosystem disturbance wild plants found at the edges of forests, fields and forests would be carried out.

• Proceedings of the Plant Resources Society of Korea Conference
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• 2000.05a
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• pp.87-87
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• 2000

• Proceedings of the Plant Resources Society of Korea Conference
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• 2007.11a
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• pp.340.1-340.1
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• 2007

• Proceedings of the Plant Resources Society of Korea Conference
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• 2020.08a
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• pp.35-35
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• 2020

본 연구는 한남정맥의 최 북서쪽에 위치한 경기도 김포시의 문수산(376m) 일원을 중심으로 식물상을 조사하였다. 본 연구에서 확인된 관속식물은 97과, 241속, 340종, 41변종, 6아종, 2품종 등 총 389분류군으로 조사되었다. 특산식물은 병꽃나무, 복사앵도 및 산이스라지 등 6분류군이 확인되었고, 식물구계학적 특정식물은 I등급은 부싯깃고사리, 비목나무, 삿갓사초, 소사나무 등 15분류군, II등급은 꼬리조팝나무, 돌단풍, 피나무, 오리나무 등 6분류군, III등급은 좀작살나무, 좀개미취, 산벚나무, 병아리꽃나무 등 5분류군, IV등급은 복상앵도, 산복사 등 3분류으로 확인되었다. 환경부에서 지정한 외래종 및 생태계교란 야생식물은 가시박, 단풍잎돼지풀, 도깨비가지, 미국쑥부쟁이, 애기수영, 털물참새피 등 53분류분이 확인되었다. 하지만 선행연구에서 조사되었던 멸종위기종 II급인 매화마름과 산림청지정 희귀식물 위기종 깽깽이풀 2분류군이 조사되지 않아 추후 추가 조사 및 유전자원 현지내외 보전대책을 수립해야 할 것이다.

• Journal of Life Science
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• v.31 no.6
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• pp.543-549
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• 2021

Approximately 10% of all angiosperms belong to the Asteraceae family. Plant species belonging to this family have traditionally been used as medicinal plants in the Korean Peninsula. We investigated the antioxidant activity of seed extracts from 14 species belonging to the Asteraceae family. Seeds with ≥ 90% percentage of filled seed and ≥ 50% final germination were used. The total phenolic content was the highest in Dendranthema zawadskii var. tenuisectum (13.5 mg of gallic acid equivalents (GAEs)/g seeds), followed by Dendranthema zawadskii var. latilobum (11.8 mg of GAEs/g seeds), and Callistephus chinensis (11.0 mg of GAEs/g seeds). The total flavonoid content was highest in C. chinensis (9.8 mg of quercetin equivalents (QEs)/g seeds), followed by D. zawadskii var. tenuisectum (7.2 mg of QEs/g seeds) and Taraxacum officinale (6.3 mg of QEs/g seeds). Our results showed that 2,2-diphenyl-1-picrylhydrazyl radical (DPPH) scavenging activity was highest in D. zawadskii var. tenuisectum (57.4 ㎍/ml), followed by T. officinale (59.1 ㎍/ml) and D. zawadskii var. latilobum (65.0 ㎍/ml), with a half maximal inhibitory concentration (IC₅₀) of DPPH scavenging activity. Furthermore, 2,2'-azino-bis(3-ethylbenzothiazoline-6-sulfonic acid) (ABTS) radical scavenging activity was highest in C. chinensis (26.2 ㎍/ml), followed by D. zawadskii var. tenuisectum (38.4 ㎍/ml), T. officinale (40.2 ㎍/ml), with a half maximal inhibitory concentration (IC₅₀) of ABTS scavenging activity. Based on a cluster analysis according to the antioxidant activity, the 14 species were classified into five groups, with group 4 having the highest antioxidant activity and group 0 having the lowest antioxidant activity. D. zawadskii var. latilobum, D. zawadskii var. tenuisectum, T. officinale, and C. chinensis belonging to groups 3 and 4, exhibited high phenolic content and antioxidant activity and can be considered potent plant-derived natural antioxidants.

• Journal of Plant Biology
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• v.39 no.1
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• pp.31-40
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• 1996

The physiological and biochemical characterizations of the ethylene-related mutants in Arabidopsis thaliana - ethylene overproducing mutant (eto1-l) and ethylene insensitive mutants (etrl-3, ein2-l) - were detailed in this studies. Two or three week.old mature rosette leaves (before bolting) were used as the plant materials. Ethylene productions of eto1-l, etrl-3, and ein2-l mutants were about 200%, 400%, and 450% compared to that of wild type, respectively. ACC synthase and ACC oxidase activities of eto1-l mutant were similar to those of wild type. ACC content and ACC N-malonyltransferase activity, however, were 4.5 times and 3 times higher than those of wild type, respectively. SAM synthetase activity increased by 50% in eto1-l mutant plant. These results indicated that the alteration in the eto1-l mutant occured before the step of the conversion of SAM to ACe. In etrl-3 and ein2-l mutants, ACC synthase activities increased, but ACC oxidase activities decreased. ACC content and ACC N-malonyltransfcrase activity were 2 times higher than those of wild type. SAM synthetase activity in etrl-3 is similar to those of wild type, while it increased by 73% in ein2-l. These results showed that the block in ethylene action affected the autoregulation of ethylene biosynthesis, so that ACC synthase activity was not autoinhibited and ACC oxidase activity was not auto stimulated by ethylene. When the leaf tissues were used for in vitro kinase assay, a cytosolic protein (approximately 36 kDa) was phosphorylated only in eto1-l and ein2-l mutants.utants.

• Korean Journal of Environment and Ecology
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• v.25 no.3
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• pp.253-266
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• 2011

The number of vascular plants in Mt. Cheongwan was 323 taxa, which were consisted of 89 families, 221 genera, 270 species, 47 varieties, and 6 formas. Corylopsis coreana belonged in level II of extinction crisis wild plant were found. Six taxa of Korean endemic plants of 6 families, 6 genera, 5 species, and 1 forma were distributed. And also, 40 taxa of floristic specially plants of which 29 in level I, 2 in level II, 6 in level III, 2 in level IV, and finally 1 in level V were recognized. The ratio of naturalized and urbanization index was 3.72 % and 4.14 %, respectively.

• Korean Journal of Plant Resources
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• v.19 no.5
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• pp.612-616
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• 2006

In recent years, there has been increasing concerns in gene flow from GM crops to wild or weedy relatives as a potential risk in the commercialization of GM crops. To access the possibility of the environmental impacts by GM rice, small-scale experiments of gene transfer were carried out. Herbicide and drought stress resistant GM rice and non-GM rice Nakdongbyeo, wild rice Oryza nivara, and weedy rice Sharebyeo were used for artificial pollination experiments and bar gene was used as a tractable marker after pollination. The harvested putative hybrid seeds after artificial pollination were germinated and true hybrid plants were selected by basta treatment. The hybrid plants were verified again by PCR amplification of bar and trehalose-6-phosphate phosphatase (TPP) genes and RAPD PCR analysis.