Endophytic fungi are plant symbionts that produce a variety of beneficial metabolites for plant growth and protection against herbivory and pathogens. Fourteen fungal samples were isolated from the roots of soybean cultivar Daemangkong and screened on waito-c rice for their plant growth-promoting capacity. Twelve of the fungal isolates promoted plant growth, while two inhibited it. The fungal isolate DK-1-1 induced maximum plant growth in both waito-c rice and soybean. The plant growth promotion capacity of DK-1-1 was higher than the wild type Gibberella fujikuroi. Gibberellin (GA) analysis of culture filtrate of DK-1-1 showed the presence of higher amounts of bioactive GA3, GA4, and GA7 (6.62, 2.1 and 1.26 ng/mL, respectively) along with physiologically inactive GA5, GA15, GA19, and GA24. Phylogenetic analysis of 18S rDNA sequence identified the fungal isolate as a new strain of Cladosporium sphaerospermum. Gibberellin production and plant growth-promoting ability of genus Cladosporium are reported for the first time in the present study.
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This study was supported by the technology development program for Agriculture and Forestry, Ministry for Agriculture, Forestry and Fisheries, Republic of Korea.
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Hamayun, M., Afzal Khan, S., Ahmad, N. et al. Cladosporium sphaerospermum as a new plant growth-promoting endophyte from the roots of Glycine max (L.) Merr.. World J Microbiol Biotechnol 25, 627–632 (2009). https://doi.org/10.1007/s11274-009-9982-9
- Cladosporium sphaerospermum
- Plant growth
- Endophytic fungi
- 18S rDNA
- Waito-c rice