Journal
PESTICIDE BIOCHEMISTRY AND PHYSIOLOGY
Volume 165, Issue -, Pages -Publisher
ACADEMIC PRESS INC ELSEVIER SCIENCE
DOI: 10.1016/j.pestbp.2019.11.025
Keywords
Pinocembroside; Penicillium italicum; 'Newhall' navel orange; Antifungal mechanism; Lipid peroxidation
Categories
Funding
- National Natural Science Foundation of China [31760598]
- Provincial education department of Jiangxi [GJJ180175]
- Natural Science Foundation and Advantage Innovation Team Project of Jiangxi Province in China [20171BAB214031, 20181BCB24005]
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Blue mold caused by Penicillium italicum is an important postharvest disease of citrus fruit. The antifungal activity of a flavonone pinocembroside compound obtained from the fruit of Ficus hirta Vahl., was evaluated against P. italicum. Pinocembroside showed antifungal activity against in vitro mycelial growth of P. italicum, with the minimum inhibitory concentration (MIC) and minimum fungicidal concentration (MFC) of 200 and 800 mg/L, respectively. The blue mold development on 'Newhall' navel oranges was inhibited by pinocembroside in a dose-dependent manner. Moreover, pinocembroside might exert its antifungal activity via membrane-targeted mechanism with increasing membrane permeability, reduction of antioxidant enzyme activity and acceleration of lipid peroxidation in the pathogen. This pioneering study suggested that pinocembroside suppressed postharvest blue mold by direct inhibition of P. italicum mycelial growth via membrane-targeting mechanism, thus providing a novel mode of action against traditional fungicides for controlling blue mold of citrus fruit.
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