Isolation and Characterization of Plant-Growth-Promoting Bacteria Associated with Salvinia auriculata Aublet

• Published in: Microorganisms (Basel) Vol. 12; no. 9; p. 1842
• Main Authors: Goulart, Jussara Tamires de Souza Silva, Quintanilha-Peixoto, Gabriel, Esteves, Bruno Dos Santos, de Souza, Suzane Ariadina, Lopes, Pollyanna Santiago, da Silva, Nathália Duarte, Soares, Julia Ribeiro, Barroso, Laura Mathias, Suzuki, Marina Satika, Intorne, Aline Chaves
• Format: Journal Article
• Language: English
• Published: Switzerland MDPI AG 06.09.2024; MDPI
• Subjects: Acids; Aquatic environment; aquatic plant; Aquatic plants; Bacteria; Biomass; biotechnological application; Biotechnology; Contaminants; Effluent treatment; Enterobacter; Gene sequencing; Growth; Inoculation; Nutrients; Pharmaceutical industry; Phylogenetics; Plant bacterial diseases; Plant biomass; Plant growth; plant growth promotion; Plant layout; plant–bacteria interaction; rRNA 16S; Salvinia auriculata; Trees; Wastewater treatment; Water pollution; Brazil; United States; United States > US; aquatic plant; biotechnological application; plant–bacteria interaction; aquatic environment; plant growth promotion
• ISSN: 2076-2607; 2076-2607
• DOI: 10.3390/microorganisms12091842

Aublet is a floating aquatic plant, capable of absorbing the excess of nutrients and water contaminants and can be used in effluent treatment plants. The ability to survive in degraded areas may be related to the association with beneficial bacteria capable of promoting plant growth. However, little is known about the microbiota associated with this aquatic plant and its potential application to the aquatic environment. In this sense, this work aims to identify bacteria associated with that could be able to promote plant growth. Eighteen bacterial strains were identified by sequencing of the 16S rRNA gene, belonging to the genera , , , , , , and . All isolates produced indole compounds, 12 fixed N , and 16 solubilized phosphate. A new strain of (sp 3.1.3.0.X.18) was selected for inoculation into . For this purpose, 500 mL of nutrient solution and 1 g of the plant were used in the control and inoculated conditions. inoculation promoted a significant increase ( ≤ 0.05) in fresh plant biomass (17%) after 4 days of cultivation. In summary, the present study characterized 18 plant-growth-promoting bacteria isolated from with potential for biotechnological application, such as the production of bioinoculants or biomass resources, to protect or improve plant growth under conditions of stress.