Plant growth promotion activity of endophytic fungi isolated from the roots of Calystegia soldanella

Young Hyun You, Hyeokjun Yoon, Ju Ri Woo, Yeonggyo Seo, Jae Ho Shin, Yeon Sik Choo, In Jung Lee, Jong Guk Kim

Research output: Contribution to journalArticlepeer-review

1 Scopus citations

Abstract

Eight endophytic fungal strains were isolated from the roots of Calystegia soldanella from the western coast of South Korea. The culture filtrate of the eight endophytic fungi were applied to waito-c rice seedlings in order to verify potential plant growth promotion activities. The results of bioassay indicated that the Cs-9-7 fungal strain possessed the highest plant growth promotion activity. Fungal culture filtrates were analyzed to verify secondary metabolites using gas chromatography and mass spectroscopy with selected ion monitoring (GC/MS-S1M). The culture filtrate of the Cs-9-7 fungal strain was confirmed to contain gibberellins GA3 (1.229 ng/mL), GA4 (3.535 ng/mL), GA7 (1.408 ng/mL) and GA12 (0.378 ng/mL). Polymerase chain reactions (PCR) were performed so as to determine the internal transcribed spacer (ITS) regions for the identification of isolated strains with universal primers ITS-1 and ITS-4. The Cs-9-7 fungal strain, isolated from the root of C. soldanella, has been named Aspergillus tubingensis Cs-9-7.

Original languageEnglish
Pages (from-to)324-329
Number of pages6
JournalMicrobiology and Biotechnology Letters
Volume39
Issue number4
StatePublished - Dec 2011

Keywords

  • Aspergillus tubingensis
  • Calystegia soldanella
  • Endophytic fungi
  • Gibberellin
  • Plant growth promotion

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