Rhizobacteria potential in the control of Meloidogyne incognita in fig
The fig tree is economically important for the social role it plays in the context of family farming. However, its economic viability can be compromised in infested areas by root-knot nematode (Meloidogyne incognita) due to lack of effective and available control measures. Therefore, the insertion of the biological control on the integrated management of this pest constitutes an important strategy. The rhizobacteria are considered promising biocontrol agents for promoting plant growth and or inhibit the parasitic action of plant-parasitic nematodes in the host plants. So, the aim of this study was to evaluate the performance of 14 bacterial isolates from the rhizosphere of fig and shale rocks in biocontrol of M. incognita in fig. Seedlings of fig plants of cv. 'Roxo de Valinhos' were microbiolized with these bacterial isolates and they were transplanted in soil naturally infested with M. incognita subsequently. Seven isolates (F08, F25, F71, F76, F78, FB34 and FB59) reduced the reproduction factor of the root-knot nematode (P <0.05) at rate ranging between 20 and 49%. Besides to suppress the pathogen reproduction, the isolated F78 (Streptomyces sp.) promoting increasing of root weight, higher chlorophyll contents and content peroxidases and polyphenol oxidases resistance enzymes, and reduction of the phenol concentration of microbiolized fig plants. In this sense, conducting further studies in this pathosystem can enable a better understanding of the action mechanisms of the bacteria tested in the biocontrol of M. incognita, as well as providing additional information for the implementation of this technique in an integrated management program of root-knot nematode.
| Main Authors: | , , , , , |
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| Format: | Digital revista |
| Language: | spa |
| Published: |
Facultad de Ciencias Agrarias y Forestales de la Universidad Nacional de La Plata
2018
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| Online Access: | https://revistas.unlp.edu.ar/revagro/article/view/7312 |
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