title: Plant growth-promoting potential of endophytic fungi isolated from Solanum nigrum leaves.
abstract: Fungal endophytes have been characterized as producers of phytohormones and potent promoters of plant growth. In this study, two fungal endophytes, Fusarium tricinctum RSF-4L and Alternaria alternata RSF-6L, were isolated from the leaves of Solanum nigrum. Culture filtrates (CFs) from each isolate were initially screened for indole compounds, and assayed for their ability to promote the growth of Dongjin rice plants. Nearly all plant growth attributes examined (i.e., chlorophyll content, root-shoot length, and biomass production) were significantly enhanced upon treatment with fungal CFs. Subsequently, gas chromatography/mass spectrometry analyses were utilized to confirm the presence of phytohormones in the CF of each fungal endophytic isolate. These analyses revealed that RSF-4L and RSF-6L produced 54 and 30 µg/mL indole acetic acid, respectively, within their respective cultures. These findings suggest that the endophytes isolated in this study synthesize bioactive compounds that could play important roles in promoting plant growth.
authors.affiliation: School of Applied Bioscience, Kyungpook National University, Daegu, 702-701, Republic of Korea.
authors.forename: Abdur Rahim
authors.initials: AR
authors.lastname: Khan
authors.forename: Ihsan
authors.initials: I
authors.lastname: Ullah
authors.forename: Muhammad
authors.initials: M
authors.lastname: Waqas
authors.forename: Raheem
authors.initials: R
authors.lastname: Shahzad
authors.forename: Sung-Jun
authors.initials: SJ
authors.lastname: Hong
authors.forename: Gun-Seok
authors.initials: GS
authors.lastname: Park
authors.forename: Byung Kwon
authors.initials: BK
authors.lastname: Jung
authors.forename: In-Jung
authors.initials: IJ
authors.lastname: Lee
authors.forename: Jae-Ho
authors.initials: JH
authors.lastname: Shin
mesh_terms: D000528:Alternaria / Q000737:chemistry / Q000302:isolation & purification*; D060026:Endophytes / Q000737:chemistry / Q000302:isolation & purification; D005670:Fusarium / Q000737:chemistry / Q000302:isolation & purification*; D008401:Gas Chromatography-Mass Spectrometry / Q000379:methods; D012275:Oryza / Q000254:growth & development; D010937:Plant Growth Regulators / Q000378:metabolism* / Q000494:pharmacology; D018515:Plant Leaves / Q000254:growth & development / Q000382:microbiology; D032324:Solanum nigrum / Q000254:growth & development* / Q000382:microbiology
chemical_list: D010937:Plant Growth Regulators