Comparison of two commercial recirculated aquacultural systems and their microbial potential in plant disease suppression

BMC Microbiology

Sammar Khalil¹  AnnaKarin Rosberg¹  Ramesh R Vetukuri²  Farideh Ghadamgahi²  Preeti Panda³ 

[1] Department of Biosystems and Technology, Swedish University of Agricultural Sciences, Box 103, 230 53, Alnarp, Sweden;Department of Plant Breeding, Swedish University of Agricultural Sciences, Box 102, 230 53, Alnarp, Sweden;Plant and Food Research, Plant Protection, Lincoln, New Zealand;

关键词: Aquaponics;    Tilapia;    Clarias;    Pseudomonas flourescens;    Pseudomonas veronii;    plant growth promotion;    in vitro;   

DOI  :  10.1186/s12866-021-02273-4

来源: Springer

【 摘 要 】

BackgroundAquaponics 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.ResultsMicrobial 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.ConclusionsThis 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.

【 授权许可】

CC BY