Abstract
Microbial secondary metabolites have been a valuable source of antifungal compounds for the fungicide industry to develop plant disease control agents. In order to find natural antifungal compounds useful for the control of Botrytis cinerea causing postharvest gray mold, we screened microbial culture extracts and found the extract of Streptomyces plumbeus strain CA5 which was isolated from the soil sample of Chuncheon Province. The cell extract of CA5 strain markedly reduced the disease incidence of gray mold on grapes to a value of 22.2 % while the non-treated control showed 100 % disease incidence. The active ingredient (CA5A) was identified from the cell extract of CA5 strain using a variety of chromatographic methods and spectroscopic analyses. The structure of CA5A was determined to be the polyene macrolide lucensomycin. Lucensomycin showed inhibitory effects against the spores of B. cinerea at a concentration as low as 1 mg L−1 and completely inhibited gray mold development on grapes at a concentration of 100 mg L−1.
Original language | English |
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Article number | 111115 |
Journal | Postharvest Biology and Technology |
Volume | 162 |
DOIs | |
Publication status | Published - 2020 Apr |
Bibliographical note
Funding Information:The study was partially supported by the Korea Institute of Planning and Evaluation for Technology of Food, Agriculture, Forestry and Fisheries (No. 316011053HD060 ), Republic of Korea . K.J.D was supported by a Korea University grant, and intramural grant (No. 2Z05630) from the Korea Institute of Science and Technology . Appendix A
Publisher Copyright:
© 2019 Elsevier B.V.
Keywords
- Antagonistic actinomycete
- Biofungicides
- Gray mold
- Lucensomycin
- Polyene macrolide
- Postharvest disease
ASJC Scopus subject areas
- Food Science
- Agronomy and Crop Science
- Horticulture