RT journal article
T1 An Algerian Soil-Living Streptomyces alboflavus Strain as Source of Antifungal Compounds for the Management of the Pea Pathogen Fusarium oxysporum f. sp. pisi
A1 Masi, Marco
A1 Nedjar, Dorsaf
A1 Bani, Moustafa
A1 Staiano, Ivana
A1 Salvatore, Maria Michela
A1 Khenaka, Karima
A1 Castaldi, Stefany
A1 García Zorrilla, Jesús
A1 Andolf, Anna
A1 Isticato, Rachele
A1 Cimmino, Alessio
A2 Química Orgánica
K1 fusarium wilt
K1 Fusarium oxysporum
K1 Streptomyces sp.
K1 antimicrobial compounds
K1 prodiginine natural products
K1 metacycloprodigiosin
AB Fusarium wilt caused by Fusarium oxysporum f. sp. pisi (Fop) poses significant threats to pea cultivation worldwide. Controlling this disease is mainly achieved through the integration of various disease management procedures, among which biological control has proven to be a safe and effective approach. This study aims to extract and identify antifungal secondary metabolites from Streptomyces alboflavus KRO3 strain and assess their effectiveness in inhibiting the in vitro growth of Fop. This bacterial strain exerts in vitro antagonistic activity against Fop, achieving highly significant inhibition over one week. The ethyl acetate extract, obtained from its ISP2 agar medium culture, also exhibited strong antifungal activity, maintaining an inhibition rate of approximately 90% at concentrations up to 250 µg/plug compared to the control. Thus, the organic extract has been fractionated using chromatographic techniques and its bioguided purification allowed us to isolate the main bioactive compound. This latter was identified as metacycloprodigiosin using nuclear magnetic resonance (NMR) spectroscopy, electrospray ionization mass spectrometry (ESI-MS), and specific optical rotation data. Metacycloprodigiosin demonstrates dose-dependent inhibitory activity against the phytopathogen with an effective concentration of 125 µg/plug. The other secondary metabolites present in the ethyl acetate extract were also identified by gas chromatography–mass spectrometry (GC-MS) and nuclear magnetic resonance (NMR). This study highlighted the potential of S. alboflavus KRO3 strain and its antimicrobial compounds for the management of the pea pathogen Fusarium oxysporum f. sp. pisi.
PB MDPI
SN 2309-608X
YR 2024
FD 2024
LK http://hdl.handle.net/10498/37272
UL http://hdl.handle.net/10498/37272
LA eng
DS Repositorio Institucional de la Universidad de Cádiz
RD 06-nov-2026