Antifungal effects of different organic extracts from Melia azedarach L. on phytopathogenic fungi and their isolated active components.
Extracts from different parts of Melia azedarach L. were studied as potential antifungal agents for selected phytopathogenic fungi. In a serial agar dilution method, hexanic and ethanolic extracts from fruit, seed kernels, and senescent leaves exhibited fungistatic activity against Aspergillus flavus,Diaporthe phaseolorum var. meridionales, Fusarium oxysporum, Fusarium solani, Fusarium verticillioides, and Sclerotinia sclerotiorum. Both hexanic extract from senescent leaves and ethanolic extract from seed kernel were highly effective on all tested fungi, with minimum inhibitory concentration (MIC) values ranging from 0.5 to 25 mg/mL and 0.5 to 5 mg/mL, respectively. In addition, all of the above-mentioned extracts showed fungicidal activity on these fungi, with ethanolic seed kernel extract being the most active. Three compounds displaying activity against F. verticillioides were isolated from the ethanolic seed kernel extract and were characterized as vanillin (1), 4-hydroxy-3-methoxycinnamaldehyde (2), and (+/-)-pinoresinol (3), with MICs of 0.6, 0.4, and 1.0 mg/mL, respectively. These compounds also showed a synergistic effect when combined in different concentrations, needing four times less concentration to reach complete inhibition in the growth of F. verticillioides.
Carpinella
María C
MC
CEPROCOR, Agencia Córdoba Ciencia S. E., Alvarez de Arenales 230, Barrio Juniors, X5004AAP Córdoba, Argentina. ccarpine@ceprocor.uncor.edu
Giorda
Laura M
LM
Ferrayoli
Carlos G
CG
Palacios
Sara M
SM
D000935:Antifungal Agents / Q000494:pharmacology*; D004305:Dose-Response Relationship, Drug; D004357:Drug Synergism; D005658:Fungi / Q000187:drug effects* / Q000254:growth & development; D031586:Melia azedarach / Q000737:chemistry*; D008826:Microbial Sensitivity Tests; D010936:Plant Extracts / Q000494:pharmacology*
D000935:Antifungal Agents; D010936:Plant Extracts