title: Diversity and Plant Growth Promoting Capacity of Endophytic Fungi Associated with Halophytic Plants from the West Coast of Korea.
abstract: Five halophytic plant species, Suaeda maritima, Limonium tetragonum, Suaeda australis, Phragmites australis, and Suaeda glauca Bunge, which are native to the Muan salt marsh of South Korea, were examined for fungal endophytes by sequencing the internal transcribed spacer (ITS) region containing ITS1, 5.8S rRNA, and ITS2. In total, 160 endophytic fungal strains were isolated and identified from the roots of the 5 plant species. Taxonomically, all 160 strains belonged to the phyla Ascomycota, Basidiomycota, and Zygomycota. The most dominant genus was Fusarium, followed by the genera Penicillium and Alternaria. Subsequently, using 5 statistical methods, the diversity indices of the endophytes were determined at genus level. Among these halophytic plants, P. australis was found to host the greatest diversity of endophytic fungi. Culture filtrates of endophytic fungi were treated to Waito-C rice seedlings for plant growth-promoting effects. The fungal strain Su-3-4-3 isolated from S. glauca Bunge provide the maximum plant length (20.1 cm) in comparison with wild-type Gibberella fujikuroi (19.6 cm). Consequently, chromatographic analysis of the culture filtrate of Su-3-4-3 showed the presence of physiologically active gibberellins, GA1 (0.465 ng/mL), GA3 (1.808 ng/mL) along with other physiologically inactive GA9 (0.054 ng/mL) and GA24 (0.044 ng/mL). The fungal isolate Su-3-4-3 was identified as Talaromyces pinophilus.
authors.affiliation: School of Life Sciences and Biotechnology, Institute for Microorganisms, Kyungpook National University, Daegu 41566, Korea.
authors.forename: Irina
authors.initials: I
authors.lastname: Khalmuratova
authors.affiliation: School of Life Sciences and Biotechnology, Institute for Microorganisms, Kyungpook National University, Daegu 41566, Korea.
authors.forename: Hyun
authors.initials: H
authors.lastname: Kim
authors.affiliation: School of Life Sciences and Biotechnology, Institute for Microorganisms, Kyungpook National University, Daegu 41566, Korea.
authors.forename: Yoon-Jong
authors.initials: YJ
authors.lastname: Nam
authors.affiliation: School of Life Sciences and Biotechnology, Institute for Microorganisms, Kyungpook National University, Daegu 41566, Korea.
authors.forename: Yoosun
authors.initials: Y
authors.lastname: Oh
authors.affiliation: School of Life Sciences and Biotechnology, Institute for Microorganisms, Kyungpook National University, Daegu 41566, Korea.
authors.forename: Min-Ji
authors.initials: MJ
authors.lastname: Jeong
authors.affiliation: School of Life Sciences and Biotechnology, Institute for Microorganisms, Kyungpook National University, Daegu 41566, Korea.
authors.forename: Hye-Rim
authors.initials: HR
authors.lastname: Choi
authors.affiliation: School of Life Sciences and Biotechnology, Institute for Microorganisms, Kyungpook National University, Daegu 41566, Korea.
authors.forename: Young-Hyun
authors.initials: YH
authors.lastname: You
authors.affiliation: Department of Biology, College of National Sciences, Kyungpook National University, Daegu 41566, Korea.
authors.forename: Yeon-Sik
authors.initials: YS
authors.lastname: Choo
authors.affiliation: School of Applied Biosciences, Kyungpook National University, Daegu 41566, Korea.
authors.forename: In-Jung
authors.initials: IJ
authors.lastname: Lee
authors.affiliation: School of Applied Biosciences, Kyungpook National University, Daegu 41566, Korea.
authors.forename: Jae-Ho
authors.initials: JH
authors.lastname: Shin
authors.affiliation: Biological and Genetic Resources Assessment Division, National Institute of Biological Resources, Incheon 22689, Korea.
authors.forename: Hyeokjun
authors.initials: H
authors.lastname: Yoon
authors.affiliation: School of Life Sciences and Biotechnology, Institute for Microorganisms, Kyungpook National University, Daegu 41566, Korea.
authors.forename: Jong-Guk
authors.initials: JG
authors.lastname: Kim
keywords: Fungal endophytes; Genetic diversity; Gibberellin; Halophytic plants; Plant growth promotion; Salt marsh
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