Mycobiology

The Korean Society of Mycology (한국균학회)
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Aspergillus clavatus Y2H0002 as a New Endophytic Fungal Strain Producing Gibberellins Isolated from Nymphoides peltata in Fresh Water

  • You, Young-Hyun (School of Life Science, Kyungpook National University) ;
  • Kwak, Tae Won (Biomedical Research Institute, Pusan National University Hospital) ;
  • Kang, Sang-Mo (School of Applied Biosciences, Kyungpook National University) ;
  • Lee, Myung-Chul (National Agrobiodiversity Center, National Academy of Agricultural Science, Rural Development Administration) ;
  • Kim, Jong-Guk (School of Life Science, Kyungpook National University)
  • Received : 2015.02.15
  • Accepted : 2015.03.12
  • Published : 2015.03.31
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Abstract

Eighteen endophytic fungi with different colony morphologies were isolated from the roots of Nymphoides peltata growing in the Dalsung wetland. The fungal culture filtrates of the endophytic fungi were treated to Waito-c rice seedling to evaluate their plant growth-promoting activities. Culture filtrate of Y2H0002 fungal strain promoted the growth of the Waito-c rice seedlings. This strain was identified on the basis of sequences of the partial internal transcribed spacer region and the partial beta-tubulin gene. Upon chromatographic analysis of the culture filtrate of Y2H0002 strain, the gibberellins (GAs: $GA_1$, $GA_3$, and $GA_4$) were detected and quantified. Molecular and morphological studies identified the Y2H0002 strain as belonging to Aspergillus clavatus. These results indicated that A. clavatus improves the growth of plants and produces various GAs, and may participate in the growth of plants under diverse environmental conditions.

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References

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