Antimicrobial activities of extracts of Cyperus rotundus L. rhizomes against some bacterial and fungal pathogens of strawberry and tomato

• Published in: Archiv für Phytopathologie und Pflanzenschutz 2015-10, Vol.48 (13-16), p.850-861
• Main Authors: Oezdemir, Zahide, Erincik, Oemer
• Format: Article
• Language: English
• Subjects: antibacterial; antifungal; Antimicrobial agents; Bacteria; Botrytis cinerea; Clavibacter michiganensis; Clavibacter michiganensis subsp. michiganensis; Cyperus rotundus; Fragaria; Fusarium oxysporum; Fusarium oxysporum f. sp. radicis lycopersici; Lycopersicon esculentum; Pathogens; plant pathogens; Plant resistance; Pseudomonas syringae; Pseudomonas syringae pv. tomato; Ralstonia solanacearum
• ISSN: 1477-2906; 0323-5408; 1477-2906
• DOI: 10.1080/03235408.2016.1144251

Antimicrobial activities of rhizome extracts of Cyperus rotundus were investigated on selected plant pathogenic bacteria and fungi. Ethyl acetate and hexane extracts showed antibacterial activity against three isolates of Clavibacter michiganensis subsp. michiganensis at concentrations of 900 and 1000 μg/ml. However, Gram-negative bacterial pathogens of tomato; Pseudomonas syringae pv. tomato and Ralstonia solanacearum were not inhibited from the extracts. Ethyl acetate extracts at 100 μg/ml inhibited mycelial growth and spore germination of the two strawberry isolates of Botrytis cinerea ; however, no significant inhibition was found in tomato fungal pathogen, Fusarium oxysporum f. sp. radicis lycopersici . Minimum inhibitory concentrations were determined as 0.0625 and 0.125 mg/ml against C . michiganensis subsp. michiganensis for ethyl acetate and hexane extracts of rhizomes, respectively. This study shows the potentials of extracts of C. rotundus rhizomes as antimicrobial agents that are effective against the tested plant pathogenic bacteria and fungi.