Results
Title

Antifungal effects of actinomycin D on Verticillium dahliae via a membrane-splitting mechanism.

Authors

Zeng, Hong; Feng, Pei-Xian; Wan, Chuan-Xing

Abstract

Antifungal bioassays led to the isolation of actinomycins D and A1 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 A1. 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.

Subjects

ANTIFUNGAL agents; DACTINOMYCIN; VERTICILLIUM dahliae; NUCLEAR magnetic resonance spectroscopy; FLOW cytometry

Publication

Natural Product Research, 2019, Vol 33, Issue 12, p1751

ISSN

1478-6419

Publication type

Academic Journal

DOI

10.1080/14786419.2018.1431630