Bacteria from the Brazilian Savanna as growth promoters in upland rice

Authors

  • Aline Cristina Mendes Façanha
  • Carlos Augusto Cavalcante de Oliveira
  • Edmilson Júnio Medeiros Caetano
  • Evandro Inácio da Costa
  • Adriano Stephan Nascente

Abstract

Beneficial bacteria can significantly enhance rice development through the production of phytohormones, biological nitrogen fixation, nutrient solubilization, siderophore synthesis and biofilm formation, which improve nutrient uptake and increase tolerance to abiotic stresses. This study aimed to assess the potential of 13 rhizobacterial isolates from the Brazilian Savanna biome to promote the growth and yield of upland rice. Biochemical assays were conducted to functionally characterize the isolates, followed by controlled-condition experiments. Evaluations included shoot and root dry biomass and grain yield components. Plants inoculated with Bacillus sp. (IA1) exhibited greater shoot biomass, whereas those treated with Acinetobacter sp. (IB10) showed higher root biomass. The Stenotrophomonas sp. (IB8) isolate resulted in the highest values for number of panicles per pot, number of grains per pot and grain yield. The principal component analysis identified Stenotrophomonas sp. (IB8) and Acinetobacter sp. (IB6) as most closely associated with yield-related traits. Bacillus sp. (IA1), B. subtilis (IR5) and Acinetobacter sp. (IB10) were more strongly linked to vegetative development. The microorganisms promoted both growth and yield in upland rice, likely due to biofilm formation, indole-3-acetic acid production and phosphate solubilization.

KEYWORDS: Oryza sativa L., seed treatment, beneficial microorganisms.

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Published

2025-09-11

How to Cite

FAÇANHA, Aline Cristina Mendes; OLIVEIRA, Carlos Augusto Cavalcante de; CAETANO, Edmilson Júnio Medeiros; COSTA, Evandro Inácio da; NASCENTE, Adriano Stephan. Bacteria from the Brazilian Savanna as growth promoters in upland rice. Pesquisa Agropecuária Tropical [Agricultural Research in the Tropics], Goiânia, p. e83152, 2025. Disponível em: https://revistas.ufg.br/pat/article/view/83152. Acesso em: 5 dec. 2025.

Issue

v. 55 (2025)

Section

Research Article

License

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