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KMID : 0379120150430010071
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Korean Journal of Mycology
2015 Volume.43 No. 1 p.71 ~ p.76
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Gibberellins Production and Identification of Endophytic Fungi Isolated from Aquatic Plant in Fresh Water
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Yoo Young-Hyun
Kang Sang-Mo
Choi Yu-Mi
Lee Myung-Chul
Kim Jong-Kuk
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Abstract
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Aquatic plant Hydrocharis dubia (Blume) Backer was collected from the Dalsung wetland in Daegu. Sixteen endophytic fungi with different colony morphologies were isolated from the roots of aquatic plants. Waito-c rice (WR) seedlings were treated with fungal culture filtrates (FCF) for screening plant growth-promoting activity. In the results, HD1008 strain isolated from aquatic plant showed highest plant growth-promoting activity. The FCF of HD1008 strain was analyzed using gas chromatography mass spectrometry (GC/MS) with selected ion monitoring (SIM). Analysis of the FCF of HD1008 strain found that it contained gibberellins (GA) (GA1, 1.2 ng/100 mL; GA4, 5 ng/100 mL). Phylogenetic tree of HD1008 strain was constructed by partial internal transcribed spacer (ITS) region and partial beta-tubulin gene sequences. Therefore, we describe HD1008 strain as a new gibberellin-producing Penicillium trzebinskii based on morphological and molecular characteristics.
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KEYWORD
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Endophytic fungi, Fresh water, Gibberellin, Penicillium trzebinskii, Plant growth-promoting activity
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