In Vitro Antifungal Activity of Peltophorum dubium (Spreng.) Taub. extracts against Aspergillus flavus

DI CIACCIO L.S.; CATALANO, A.V.; LÓPEZ, P.G. ; ROJAS, D. ; CRISTO, D.; FORTUNATO, R.H.; SALVAT A.E.

Plants

MDPI, St. Alban-Anlage 66, 4052 Basel, Switzerland

Lugar: Basel; Año: 2020 p. 1 - 11

Aspergillusflavusisafilamentous,saprophyticfungus,whosecolonizationoccursmainlyin cereal grains and oilseeds once harvested. Under certain conditions, it could produce mycotoxins called aflatoxins, known as powerful human liver carcinogens. The aim of the present study was to describe the antifungal activity of extracts of Peltophorum dubium, a species from northern Argentina (Oriental Chaco), against A. flavus. The antifungal activities of different collection sites are reported. Theextractsexhibitedaminimuminhibitoryconcentrationof125 µg/mL,andthedifferencesbetween the treatments and the inoculum control were 11 mm of P. dubium A and 10 mm of P. dubium F in colony growth. Moreover, hyphae treated with the extracts stained blue with Evans blue showed alterations in the membrane and/or cell wall, allowing the dye income. Bio-guided fractionation, High Performance Liquid Chromatography diode array ultraviolet/visible (HPLC UV/VIS DAD), and Ultra-High Performance Liquid Chromatography Electrospray Ionization Mass Spectrometry (UPLC ESI-MS) analyses were conducted to characterize the extracts and their active fractions. The HPLC UV/VIS DAD analysis allowed the determination of the presence of flavonoids (flavonols and flavones), coumarins, terpenes, and steroids. UPLC ESI/MS analysis of active fractions revealed the presence of Kaempferol, Apigenin, Naringenin, Chrysin and Daidzein.