Khalil, Samar
- Department of Biosystems and Technology, Swedish University of Agricultural Sciences
Abstract
Background Aquaponics are food production systems advocated for food security and health. Their sustainability from a nutritional and plant health perspective is, however, a significant challenge. Recirculated aquaculture systems (RAS) form a major part of aquaponic systems, but knowledge about their microbial potential to benefit plant growth and plant health is limited. The current study tested if the diversity and function of microbial communities in two commercial RAS were specific to the fish species used (Tilapia or Clarias) and sampling site (fish tanks and wastewaters), and whether they confer benefits to plants and have in vitro antagonistic potential towards plant pathogens. Results Microbial diversity and composition was found to be dependent on fish species and sample site. The Tilapia RAS hosted higher bacterial diversity than the Clarias RAS; but the later hosted higher fungal diversity. Both Tilapia and Clarias RAS hosted bacterial and fungal communities that promoted plant growth, inhibited plant pathogens and encouraged biodegradation. The production of extracellular enzymes, related to nutrient availability and pathogen control, by bacterial strains isolated from the Tilapia and Clarias systems, makes them a promising tool in aquaponics and in their system design. Conclusions This study explored the microbial diversity and potential of the commercial RAS with either Tilapia or Clarias as a tool to benefit the aquaponic system with respect to plant growth promotion and control of plant diseases.
Keywords
aquaponics; Tilapia; Clarias,; Pseudomonas flourescens; Pseudomonas veronii; plant growth promotion; in vitro antagonistic
Published in
BMC Microbiology
2021, volume: 21, number: 1, article number: 205
SLU Authors
Ghadamgahi, Farideh
- Department of Plant Breeding, Swedish University of Agricultural Sciences
- Department of Plant Breeding, Swedish University of Agricultural Sciences
Rosberg, Anna Karin
- Department of Biosystems and Technology, Swedish University of Agricultural Sciences
- Department of Biosystems and Technology, Swedish University of Agricultural Sciences
Vetukuri, Ramesh
- Department of Plant Breeding, Swedish University of Agricultural Sciences
- Department of Plant Breeding, Swedish University of Agricultural Sciences
Associated SLU-program
SLU Plant Protection Network
Global goals (SDG)
SDG2 Zero hunger
SDG6 Clean water and sanitation
UKÄ Subject classification
Fish and Aquacultural Science
Publication identifier
- DOI: https://doi.org/10.1186/s12866-021-02273-4
Permanent link to this page (URI)
https://res.slu.se/id/publ/112663