Actividad antagonista de PGPR en nematodo fitoparásito Pratylenchus spp. en Musa paradisiaca (Musa acuminata × M. balbisiana) vc cavendish
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Rev. Inv. Cs. Agro. y Vet.
Abstract
El uso excesivo de nematicidas para el control de Pratylenchus spp. en el cultivo de banano incide en la reducción de microorganismos benéficos del suelo. Para lo cual el objetivo fue evaluar la actividad antagonista de Rizobacterias Promotoras del Crecimiento Vegetal (PGPR) en el control de Pratylenchus spp. El estudio se desarrolló en áreas del departamento de Biotecnología de la Universidad Técnica Estatal de Quevedo, Ecuador. Se aplicaron diseño experimental completamente aleatorizado con cinco tratamientos, tres consorcios de rizobacterias y dos controles (químico y sin aplicación). Se evaluaron variables morfológicas y fisiológicas en las plantas, además del número de nematodos en suelo y raíz. Los resultados mostraron que la combinación de cepas (Acinetobacter, Serratia, Pseudomonas) presentó mayor peso y longitud radicular (164,7g y 48,7 cm), además del contenido de raíces funcionales, un mayor contenido de clorofila y reducción de la población de nematodos en raíces y suelo en más del 50%. Por lo que las PGPR constituyen una alternativa biológica efectiva para el control de fitonematodos.
The excessive use of nematicides for the control of Pratylenchus spp. in banana crops has an impact on the reduction of beneficial microorganisms in the soil. The objective was to evaluate the antagonistic activity of Plant Growth Promoting Rhizobacteria (PGPR) in the control of Pratylenchus spp. The study was developed in areas of the Biotechnology Department of the State Technical University of Quevedo, Ecuador. A completely randomized experimental design was applied with five treatments, three consortia of rhizobacteria and two controls (chemical and without application). Morphological and physiological variables were evaluated in the plants, in addition to the number of nematodes in soil and roots. The results showed that the combination of strains (Acinetobacter, Serratia, Pseudomonas) had a higher root weight and length (164.7 g and 48.7 cm), in addition to the functional root content, a higher chlorophyll content and a reduction of the nematode population in roots and soil by more than 50%. Therefore, PGPR constitute an effective biological alternative for the control of phytonematodes.
The excessive use of nematicides for the control of Pratylenchus spp. in banana crops has an impact on the reduction of beneficial microorganisms in the soil. The objective was to evaluate the antagonistic activity of Plant Growth Promoting Rhizobacteria (PGPR) in the control of Pratylenchus spp. The study was developed in areas of the Biotechnology Department of the State Technical University of Quevedo, Ecuador. A completely randomized experimental design was applied with five treatments, three consortia of rhizobacteria and two controls (chemical and without application). Morphological and physiological variables were evaluated in the plants, in addition to the number of nematodes in soil and roots. The results showed that the combination of strains (Acinetobacter, Serratia, Pseudomonas) had a higher root weight and length (164.7 g and 48.7 cm), in addition to the functional root content, a higher chlorophyll content and a reduction of the nematode population in roots and soil by more than 50%. Therefore, PGPR constitute an effective biological alternative for the control of phytonematodes.
Description
Vol. 8, No. 24
Keywords
Antagonismo de Rizobacterias, Consorcio de bacterias, Microorganismos benéficos del suelo, Musáceas, Fitonematodos, Sostenibilidad, Rhizobacteria antagonism, Bacterial consortium, Beneficial soil microorganisms, Musaceae, Phytonematodes, Sustainability, Antagonismo de rizobactérias, Consórcio bacteriano, Microrganismos benéficos do solo, Musaceae, Fitonematoides, Sustentabilidade