title: Aspergillus clavatus Y2H0002 as a New Endophytic Fungal Strain Producing Gibberellins Isolated from Nymphoides pe ltata in Fresh Water.
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: GA1, GA3, and GA4) 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.
authors.affiliation: School of Life Science, Kyungpook National University, Daegu 702-701, Korea. ; National Agrobiodiversity Center, National Academy of Agricultural Science, Rural Development Administration, Jeonju 560-500, Korea.
authors.forename: Young-Hyun
authors.initials: YH
authors.lastname: You
authors.affiliation: Biomedical Research Institute, Pusan National University Hospital, Busan 602-739, Korea.
authors.forename: Tae Won
authors.initials: TW
authors.lastname: Kwak
authors.affiliation: School of Applied Biosciences, Kyungpook National University, Daegu 702-701, Korea.
authors.forename: Sang-Mo
authors.initials: SM
authors.lastname: Kang
authors.affiliation: National Agrobiodiversity Center, National Academy of Agricultural Science, Rural Development Administration, Jeonju 560-500, Korea.
authors.forename: Myung-Chul
authors.initials: MC
authors.lastname: Lee
authors.affiliation: School of Life Science, Kyungpook National University, Daegu 702-701, Korea.
authors.forename: Jong-Guk
authors.initials: JG
authors.lastname: Kim
keywords: Aquatic plant; Aspergillus clavatus; Fresh water; Gibberellin; Plant growth-promoting activity