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KMID : 0613820110210111619
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Journal of Life Science
2011 Volume.21 No. 11 p.1619 ~ p.1624
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Plant Growth-Promoting Activity of Endophytic Fungi Isolated from the Roots of Native Plants in Dokdo Islands
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You Young-Hyun
Yoon Hyeok-Jun
Woo Ju-Ri
Seo Yeong-Gyo
Kim Mi-Ae
Choo Yeon-Sik
Kim Jong-Guk
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Abstract
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Endophytic fungal strains were isolated from the roots of six species plants in the Dokdo islands. Native plant samples, such as Artemisia japonica, Chenopodium album and Solanum nigrum were isolated from Dongdo, and those such as Cyrtomium falcatum, Dianthus longicalyx and Tetragonia tetragonoides were isolated from Seodo. In total, thirty two fungal strains were isolated from these native plants. To identify the fungal strains, polymerase chain reaction (PCR) amplification of internal transcribed spacer (ITS: containing ITS1, 5.8s and ITS2 region) regions was done with universal primers ITS1 and ITS4. Endophytic fungi of four species were isolated from A. japonica, eight species from C. album, three species from S. nigrum, three species from C. falcatum, three species from D. longicalyx and eleven species from T. tetragonoides. Culture filtrates (CF) of isolated endophytic fungi were used to treatwaito-c rice seedlings to test plant growth-promoting activity. As a result of bioassay, Ca-5-2-2 strain isolated from C. album expressed highest plant growth-promotion activity. Of all the endophytic fungi isolated, Penicillium sp., Fusarium sp. and Aspergillus sp. were the most abundantly distributed fungal strains in the six plants used in this study.
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KEYWORD
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Dokdo islands, diversity, endophytic fungi, plant growth-promotion
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