期刊
NATURAL PRODUCT RESEARCH
卷 33, 期 12, 页码 1751-1755出版社
TAYLOR & FRANCIS LTD
DOI: 10.1080/14786419.2018.1431630
关键词
Streptomyces luteus; actinomycin D; antifungal activity; Verticillium dahliae; membrane-splitting mechanis
资金
- National Natural Science Foundation of China [31460138]
- Doctor Program of Xinjiang Production and Construction Corps [2014BB002]
Antifungal bioassays led to the isolation of actinomycins D and A(1) from Streptomyces luteus TRM45540 collected from Norpo in Xinjiang, and these compounds were identified by nuclear magnetic resonance spectroscopy. The antifungal activity of actinomycin D was higher than that of actinomycin A(1). Actinomycin D clearly inhibited the spore germination, hyphal growth and biomass accumulation of Verticillium dahliae in a dose-dependent manner. Flow cytometric analysis with propidium iodide, total ergosterol measurement, cell leakage and scanning electron microscopy experiments demonstrated that the plasma membrane of this fungus was damaged by actinomycin D, resulting in swollen cells and cellular content leakage. Transmission electron microscopy revealed that parts of the plasma membrane infolded after being treated with actinomycin D. The antifungal activity of actinomycin D damaged the fungal plasma membrane of V. dahliae via a membrane-splitting mechanism, which provided new insights into the functional mechanism of actinomycin D. [GRAPHICS] .
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