title: Chrysosporium pseudomerdarium produces gibberellins and promotes plant growth.
abstract: We isolated 10 endophytic fungi from the roots of drought stressed soybean cultivar Hwangkeumkong and bioassayed on waito-c rice and soybean seedlings, in order to identify plant growth-promoting fungi. The fungal isolate D-2-1 provided the best result for plant height and biomass promotion as compared to wild type Gibberella fujikuroi. The D-2-1 culture filtrate (CF) was analyzed for the presence of gibberellins (GAs) and it was observed that all physiologically active GAs, especially gibberellic acid, were present in higher amounts (GA1, 0.24 ng/ml; GA3, 8.99 ng/ml; GA4, 2.58 ng/ml and GA7, 1.39 ng/ml) in conjunction with physiologically inactive GA5, GA9, GA15, GA19, and GA24. The fungal isolate D-2-1 was identified as a new strain of Chrysosporium pseudomerdarium through phylogenetic analysis of 18S rDNA sequence. Plant growth promotion and GAs production capacity of genus Chrysosporium have been reported for the first time in this study.
authors.affiliation: School of Applied Bioscience, Kyungpook National University, Daegu 702-701, Republic of Korea.
authors.forename: Muhammad
authors.initials: M
authors.lastname: Hamayun
authors.forename: Sumera Afzal
authors.initials: SA
authors.lastname: Khan
authors.forename: Ilyas
authors.initials: I
authors.lastname: Iqbal
authors.forename: Chae-In
authors.initials: CI
authors.lastname: Na
authors.forename: Abdul Latif
authors.initials: AL
authors.lastname: Khan
authors.forename: Young-Hyun
authors.initials: YH
authors.lastname: Hwang
authors.forename: Byung-Hyun
authors.initials: BH
authors.lastname: Lee
authors.forename: In-Jung
authors.initials: IJ
authors.lastname: Lee
mesh_terms: D018533:Biomass; D002912:Chrysosporium / Q000145:classification / Q000235:genetics / Q000302:isolation & purification / Q000378:metabolism*; D004271:DNA, Fungal / Q000235:genetics; D004275:DNA, Ribosomal / Q000235:genetics; D005875:Gibberellins / Q000096:biosynthesis*; D008969:Molecular Sequence Data; D010802:Phylogeny; D010937:Plant Growth Regulators / Q000096:biosynthesis*; D012337:RNA, Ribosomal, 18S / Q000235:genetics; D013025:Glycine max / Q000254:growth & development* / Q000382:microbiology
chemical_list: D004271:DNA, Fungal; D004275:DNA, Ribosomal; D005875:Gibberellins; D010937:Plant Growth Regulators; D012337:RNA, Ribosomal, 18S