• Title/Summary/Keyword: 고사리

Search Result 278, Processing Time 0.032 seconds

Phylogenetic study of the fern genus Hypodematium (Hypodematiaceae), focusing on Korean native taxa (한국산 금털고사리속의 계통분류학적 연구)

  • LEE, Chang Shook;LEE, Kanghyup;YEAU, Sung Hee;CHUNG, Kyong-Sook
    • Korean Journal of Plant Taxonomy
    • /
    • v.48 no.3
    • /
    • pp.163-171
    • /
    • 2018

  • In Korea, Hypodematium glanduloso-pilosum was formerly known as the only Korean native species in the genus. Recently, however, we reported one unrecorded taxon, H. squamuloso-pilosum Ching, which was found on rocks at a limestone mountain in Yeongwol, along with one new taxon, H. angustifolium in Okcheon. Traditionally, Hypodematium taxa are often distinguished from each other by vegetative characters such as pinnatifid lamina, glandular hairs, and narrower or linear lanceolate scales on stipe bases. H. glanduloso-pilosum, distributed widely throughout the country except on Jejudo Island in Korea, exhibiting variations in leaf segregation, indusia positions, hair distributions and size. The high variation in the morphological characters in the widely distributed taxon has caused problems delimitating three native species from each other. To evaluate the phylogenetic relationships among H. glanduloso-pilosum and taxa related to Hypodematium (all Korean native taxa), we carried out morphological and molecular analyses (cpDNA rbcL and psbA-trnH) of populations of the genus Hypodematium in Korea. Although H. glanduloso-pilosum exhibits high variations in some morphological characters, the species is characterized by stipes and indusia with densely multicellular hairs and rod-shaped glandular hairs or hairs and lanceolate or oblong lanceolate scales in rhizomes and stipe bases distinguished from those of other Korean native taxa (H. squamuloso-pilosum and H. angustifolium). In the analyses of cpDNA data, three Korean native taxa are placed in the same clade, i.e., in the glanduloso-pilosum group. Moreover, our analyses propose that H. squamuloso-pilosum (China and Korea), H. angustifolium (Korea), and H. fordii (China and Japan) share the same glanduloso-pilosum clade with H. glandulosopilosum (China, Korea, and Japan).

  • https://doi.org/10.11110/kjpt.2018.48.3.163 인용 PDF KSCI

Antioxidant Activities of Ostrich Fern by Different Extraction Methods and Solvents (추출방법 및 용매에 따른 청나래고사리의 항산화 활성)

  • Shin, So-Lim;Lee, Cheol-Hee
    • Journal of Life Science
    • /
    • v.21 no.1
    • /
    • pp.56-61
    • /
    • 2011

  • This study was performed to investigate effective extract conditions in fronds of the Ostrich fern (Matteuccia struthiopteris) to increase antioxidant compound contents and antioxidant capacity. Powder (1 g) of lyophilizated fronds were mixed with 3 kinds of solvents (MeOH, 80% EtOH and water). Extractions were carried out using not only immersion (room temp.), heating ($60^{\circ}C$) and stirring (200rpm) for 6 hr, but also through sonication in a 42 kHz ultrasonic bath for 15, 30 and 45 min. Extracts were filtrated and measured for contents of soluble solids (SS), total polyphenols (TP; tannic acid as a standard) and total flavonoids (TF; Naringin as a standard). Antioxidant activity was expressed as $RC_{50}$ for DPPH and ABTS radical scavenging. SS (0.317 $g{\cdot}g^{-1}$ db), TP (70.90 $mg{\cdot}g^{-1}$ db) and TF (41.53 $mg{\cdot}g^{-1}$ db) contents reached their highest levels when 30 minute sonication extraction with 80% EtOH was performed, and the highest DPPH and ABTS scavenging activity was observed in the same extraction conditions ($RC_{50}$=0.14 $mg{\cdot}ml^{-1}$ and 0.09 $mg{\cdot}ml^{-1}$, respectively). From the present investigation, it can be concluded that fronds of the ostrich fern can be used as a natural material for antioxidants, and sonication for 15-30 min with 80% EtOH is an ideal extraction method for increasing their antioxidant effects and saving extraction time.

  • https://doi.org/10.5352/JLS.2011.21.1.56 인용 PDF KSCI

금연위문편지-"국군장병 금연 위해 초등학생들 나섰다"

  • KOREA ASSOCIATION OF HEALTH PROMOTION
    • 건강소식
    • /
    • v.32 no.8
    • /
    • pp.46-47
    • /
    • 2008

  • 국군장병들의 건강을 기원하는 금연위문편지가 전달돼 화제가 되고 있다. 한국건강관리협회(회장 이순형)는 지난 6월 18일 5군수지원 사령부 186공병대대를 시작으로 부대원들을 대상으로 한 방문금연클리닉을 실시하고 금연 위문편지를 전달하는 행사를 진행했다. 어린 초등학생들이 고사리 손으로 쓴 군 장병들을 위한 금연위문 편지를 받아 본 장병들은 모처럼 즐거운 시간을 보냈다.

  • PDF