This study attempted to investigate the antioxidant properties of four different species of sand dune plants (Calystegia soldanella, Messerschmidia sibirica, Vitex rotundifolia and Rosa rugosa). In order to validate the antioxidant activity of these plants, we first determined the total amount of flavonoid versus phenolic contents (TFC/TPC) and extracted crude flavonoids for measuring antioxidant activities that were determined by DPPH, ABTS and FRAP assays with radical scavenging effects. We found that highest amounts of TPC were detected in R. rugose with values of 110.20 ㎎/g (leaves) and 65.71 ㎎/g (stems), while the highest amounts of TFC in V. rotundifolia with values of 38.07 ㎎/g (leaves) and 6.55 ㎎/g (stems). We further examined how closely related the amounts of TFC/TPC in antioxidant activities and found that R. rugose has the highest activities of radical scavenging with values of 63.4 ㎍/㎖ and 51.2 ㎍/㎖ determined by DPPH and ABTS assays compared with the value of 21.2 ㎍/㎖ by FRAP assay. It is of note that there is a statistically significant correlation between the resulting antioxidant activities and the total ratio of TFC and TPC, suggesting that the different amounts of TFC/TPC may directly contribute to the various antioxidant activities.

본 연구는 우리나라 남해안과 제주도 일대 해안사구에 분포하는 유관속식물을 대상으로 2006년 2월부터 11월까지 조사한 결과, 조사지역내에 분포하는 식물은 51과 130속 152종 1품종 18변종 등 총 171분류군으로 관찰되었으며, 주요 출현종은 Calystegia soldanella(갯메꽃), Ischaemum anthephoroides(갯쇠보리), Imperata cylindrica va. koenigii(띠), Vitex rotundifolia(순비가나무), Carex pumila(좀보리사초), Carex kobomugi(통보리사초) 등으로 나타났다. 본 지역에서 조사된 171종류의 식물자원의 유용도를 분석한 결과 총 113종류의 자원식물이 분류되었으며, 식용자원(Edible source, E)은 73종류(40.5%), 약용자원(Medicinal source, M)은 61종류(33.9%), 초지자원(Pasture source, P)은 22종류(12.2%), 관상자원(Ornamental source, O)은 16종류(8.9%), 섬유자원 (Fiber source, F)은 7종류(3.9%), 목재자원(Timber source, T)은 1종류(0.5%)의 순으로 나타났다. 한국특산식물은 1분류군이 조사지역내 분포하며, 식물구계학적 특정식물 중 I III IV V등급 식물은 24과 28속 29분류군으로 소산식물 171분류군의 16.9%로 나타났으며, 귀화식물은 9과 16속 19분류군로 우리나라 전체 귀화식물 271종류의 7.0%이다.

This study was carried out to investigate and analyze the vascular flora and injury status in Shinduri coastal dune area (N36˚ 49', E126˚ 11'), where designated as Natural Monuments and the result are as follows. The vascular plants identified and surveyed were 125 taxa including 108 species, 14 varieties, 2 forms and 1 hybrid of 92 genera of 40 families and there are 20 taxa including 17 species, 2 varieties and 1 hybrid of 15 genera of 10 families for woody plants, while 105 toxa including 91 species, 12 varieties and 2 forms of 78 genera of 34 families for the herbaceous plants at the . study sites. Seventeen taxa including 17 species of 15 genera of 9 families were investigated for naturalized plants and ratio of naturalization was 13.6 percents at the study sites. Glehnia littorolis Fr. Schm. and Lilium callosum S. et Z. appeared as rare and endangered plants designated in Korea Forest Service. Nine taxa in degree 1, 2 taxa in degree 2, 4 taxa in degree 3, 2 taxa in degree 4 and 2 taxa in degree 5 were represented for especialized species.