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KMID : 0880220090470040425
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Journal of Microbiology
2009 Volume.47 No. 4 p.425 ~ p.430
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Chrysosporium pseudomerdarium produces gibberellins and promotes plant growth
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Muhammad Hamayun
Lee Byung-Hyun
Hwang Young-Hyun
Lee In-Jung
Sumera Afzal Khan
Ilyas Iqbal
Na Chae-In
Abdul Latif Khan
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Abstract
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We isolated 10 endophytic fungi from the roots of drought stressed soybean cultivar Hwangkeumkong and bioassyed on waito-c rice and soybean seedlings, in order to identify plant growth-promoting fungi. The fungal isolate D-2-1 provided the best result for plant height and biomass promotion as compared to wild type Gibberella fujikuroi. The D-2-1 culture filtrate (CF) was analyzed for the presence of gibberellins (GAs) and it was observed that all physiologically active GAs, especially gibberellic acid, were present in higher amounts (GA1, 0.24 ng/ml; GA3, 8.99 ng/ml; GA4, 2.58 ng/ml and GA7, 1.39 ng/ml) in conjunction with physiologically inactive GA5, GA9, GA15, GA19, and GA24. The fungal isolate D-2-1 was identified as a new strain of Chrysosporium pseudomerdarium through phylogenetic analysis of 18S rDNA sequence. Plant growth promotion and GAs production capacity of genus Chrysosporium have been reported for the first time in this study.
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KEYWORD
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Chrysosporium pseudomerdarium, gibberellin production, endophytic fungi, soybean, plant growth
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