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KMID : 0613820130230010095
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Journal of Life Science
2013 Volume.23 No. 1 p.95 ~ p.101
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Plant Growth-Promoting Activity and Genetic Diversity of Endophytic Fungi Isolated from Native Plants in Dokdo Islands for Restoration of a Coastal Ecosystem
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You Young-Hyun
Yoon Hyeok-Jun
Kim Hyun
Lim Sung-Hwan
Shin Jae-Ho
Lee In-Jung
Choo Yeon-Sik
Kim Jong-Guk
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Abstract
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In this study, plant samples of five species were collected from the Dokdo islands in South Korea. Plant samples such as Asparagus schoberioides, Corydalis platycarpa, Festuca rubra, Sedum oryzifolium, and Setaria viridis were collected from the Dongdo and Seodo. Endophytic fungal strains were isolated from the roots of five plants from the Dokdo islands. Thirty-three fungal strains were isolated from these native plants. All the endophytic fungi were analyzed by internal transcribed spacer (ITS) sequencing (ITS containing ITS1, 5.8s, and the ITS2 region). Waito-c rice seedlings were treated with fungal culture filtrates to test their plant growth-promoting activity. A bioassay of the D-So-1-1 fungal strain isolated from S. oryzifolium confirmed that it has the highest plant growth-promoting activity. All the endophytic fungi belong to four orders: Eurotiales (86%), Capnodiales (3%), Hypocreales (4%), and Incertae sedis (7%). The endophytic fungi were classified as Ascomycota, which contained Aspergillus (12%), Cladosporium (3%), Eurotium (3%), Fusarium (18%), Microsphaeropsis (6%), and Penicillium (58%) at the genus level.
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KEYWORD
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Dokdo islands, endophytic fungi, diversity, plant growth promotion, phylogenetic analysis
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