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- Title
Actinomicetos aislados del compost y su actividad antagonista a fitopatógenos de la papa (Solanum tuberosum spp. andigena Hawkes).
- Authors
Rojas, Fernanda Pérez; Quispe, Jorge León; Cabello, Nadia Galindo
- Abstract
One way of controlling phytopathogens is through the use antagonistic microorganisms. Compost is a source of microorganisms capable of producing secondary metabolites of agricultural interest. We isolated 85 actinomycetes in vitro cultures and evaluated their antagonist capacity against phytopathogens affecting Solanum tuberosum. Of the isolates, 23.5% showed antagonistic activity against Ralstonia solanacearum, 16.4% against Pectobacterium carotovorum, 43.5% against Phytophthora infestans, 25.8% against Fusarium sp., and 61.1% against Rhizoctonia solani. Organic extracts obtained from the selected strains (AACI- 5, ACZI-22, ACZII-35, ACZIII-84 y ACZIII-88) with ethyl acetate and dichloromethane showed antimicrobial activity. The most important was the ethyl acetate extract from the AACI-5 strain, which had a broader spectrum of activity and showed a minimum inhibitory concentration (MIC) against Phytophthora infestans of 0.0625 mg.mL-1. The most active strains were identified as members of the genus Streptomyces. Due to the antagonist agroquímicapacity showed by actinomycetes in this work, they could be considered as potential candidates for controlling potato pathogens under the framework of sustainable agriculture.
- Subjects
BIOLOGICAL control of plant diseases; POTATO diseases &; pests; ACTINOMYCETALES; INHIBITORY Concentration 50; ERWINIA; PHYTOPHTHORA infestans; SUSTAINABLE agriculture
- Publication
Revista Mexicana de Fitopatología, 2015, Vol 33, Issue 2, p116
- ISSN
0185-3309
- Publication type
Article