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dc.contributor.authorChumpitaz Bermejo, Astrid-
dc.contributor.authorCaro Castro, Junior-
dc.contributor.authorCruz Hilacondo, Wilbert-
dc.contributor.authorLeón Quispe, Jorge-
dc.identifier.citationChumpitaz, A.; Caro, J.; Cruz, W.; León, J. 2020. Rhizospheric actinomycetes from organic crops of native potato (Solanum tuberosum): isolation, phenotypic characterization, molecular identification, and impact on biocontrol of Phytophthora infestans (Mont.) de Bary. Scientia Agropecuaria 11(2): 223-231.es_PE
dc.description9 Páginases_PE
dc.description.abstractPotato (Solanum tuberosum L.) is the fourth most consumed food crop in the world, whose production in Peru is diminished due to phytosanitary problems and high costs of chemical fertilizers. In the present work, 32 actinomycetes isolated from the rhizosphere of organic native potato crops collected in the town of Cabana, Lucanas, Ayacucho, were characterized phenotypically and evaluated for their in vitro antagonistic capacity against Oomycete phytopathogen Phytophthora infestans. The characterization tests showed that 97% of the actinomycetes were able to assimilate glucose, sucrose, and mannitol; as well as producing extracellular enzymes like amylases (100%) and cellulases (50%). Furthermore, the growth in laboratory culture was better in the range of pH 5.5-8.5 and temperature 28-30 °C. From the tests of antagonism in oat agar (71.9%) and rye agar (31.2%), three strains were selected according to the native potato variety were selected as CAB10-J2 (Ccompis), CAB9-CA4 (Cuchipa-akan) and CAB5-F5 (Futis) with pathogen inhibition rates of 80.05, 77.47 and 37.5% respectively. The strains were identified by molecular tests as members of the genus Streptomyces and owners of polyketide synthase (PKS) genes. It is concluded that the rhizospheric actinomycetes of potato are producers of bioactive compounds capable of remarkably inhibiting the pathogen Phytophthora infestans, being able to be considered candidates in biological control programs of the "potato blight".es_PE
dc.description.tableofcontents1.- Introduction. 2.- Materials and methods. 3.- Results and discussion. 4.- Conclusiones. References.es_PE
dc.publisherUniversidad Nacional de Trujilloes_PE
dc.relation.ispartofScientia Agropecuaria 11(2): 223 – 231 (2020)es_PE
dc.sourceInstituto Nacional de Innovación Agrariaes_PE
dc.source.uriRepositorio Institucional - INIAes_PE
dc.subjectPhytophthora infestanses_PE
dc.subjectNative potatoes_PE
dc.subjectBiocontrol of pestses_PE
dc.titleRhizospheric actinomycetes from organic crops of native potato (Solanum tuberosum): isolation, phenotypic characterization, molecular identification, and impact on biocontrol of Phytophthora infestans (Mont.) de Baryes_PE
dc.subject.ocdeBiotecnología agrícolaes_PE
dc.identifier.journalScientia Agropecuariaes_PE
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