Antifungal activity against plant pathogens by compounds from Streptoverticillium morookaense
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Biological control of pathogens by endophytes is a promising approach. The present study reports the significant impact of an antifungal compound that is isolated from Streptoverticillium morookaense as a potential biocontrol agent. This antifungal compound demonstrated a significant inhibitory activity against the three phytopathogenic fungi, Ustilaginoidea virens, Rhizoctonia solani and Bipolaris maydis and resulted in severe morphological distortions in their structure. Minimal inhibitory concentrations of the compound ranged from 50 to 150 μg/ml. In vitro evaluation of the compound showed strong control efficacy against U. virens, a causative agent of rice false smut fungus, on susceptible rice seedlings. In addition, it promoted plant growth with increased rate of seed germination and displayed no phytotoxicity. This compound also showed stability after its exposure to a temperature of 100 °C. The antifungal metabolite produced by this actinomycete may be developed as a safe and ideal bio-fungicide for the control of different fungal plant diseases.
KeywordsAntifungal Biocontrol Ergosterol Streptoverticillium morookaense U. virens
This work was supported by the National Natural Sciences Foundation of China (30970627) and the fund for the Important Direction Research on Knowledge Innovation Project (KSCX2-EW-N-06) from CAS awarded to J.X. Li. M. Andargie was a recipient of the ‘Visiting Fellowship for Researchers from Developing Countries’ Award (2013FFSA0005) from Chinese Academy of Sciences. We would like to thank Prof Xiaoyi Wei for providing the metabolites that were extracted from S. morookaense.
Compliance with ethical standards
Conflict of interest
There is no conflict of interest in this study.
This article does not contain any studies with human participants or animals performed by any of the authors.
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