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- Title
Biodiversidade de bactérias antagônicas a fungos associados à sindrome da morte do capim-marandu (Brachiaria brizantha).
- Authors
Both BOURSCHEIDT, Maira Laís; do CARMO, Kellen Banhos; Carneiro PEDREIRA, Bruno; de Campos Martin BERBER, Gilcele; Ferreira, Anderson
- Abstract
The death syndrome of marandu grass (Brachiaria brizantha) is one of the main problems in the degradation of pastures in the Amazon biome. Plant death occurs during the rainy season due to susceptibility to phytopathogens. Thus, the objective was to study production systems and select bacteria antagonistic to Fusarium spp., one of the phytopathogenic agents. Bacterial isolates were obtained from 10 production systems, native forest and fallow, in rain and drought season. Molecular characterization of isolates was carried out by sequencing. Two Fusarium isolates were assessed. For pathogen 1, in the rainy season, 7.5% of the isolates showed antagonism, while in the dry season it was 15%. For pathogen 2, not all isolates positive for pathogen 1 were efficient in the control, showing correlations between bacterial isolates and Fusarium spp. In the rain, for pathogen 1, the forest showed the highest number of positive isolates (20%). In the dry season, the treatments forest, 1-Forest and 8-plant-forest integration for pathogen 1, were ones with the highest number of positives (25%). In the molecular identification, 8 bacterial genera were found: Burkholderia, Bacillus, Brevibacillus, Streptomyces, Pseudomonas, Escherichia, Paenibacillus and Pandoraea, most of which are described as able to controlling Fusarium spp. in vitro.
- Publication
Nativa, 2021, Vol 9, Issue 5, p454
- ISSN
2318-7670
- Publication type
Article
- DOI
10.31413/nativa.v9i5.12666