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Streptophage-mediated control of off-flavour taint producing streptomycetes isolated from barramundi ponds

Synthetic and Systems Biotechnology 2017年第2期2卷 105-112页

作者： Jodi Anne Jonns Peter Richard Brooks Paul Exley sue poole D_Ipek Kurtboke Genecology Research Centre Faculty of ScienceHealthEducation and EngineeringUniversity of the Sunshine CoastMaroochydore DCQLD4558Australia Innovative Food Technologies Department of Agriculture and FisheriesHealth and Food Sciences PrecinctBlock 1039 Kessels RoadCoopers PlainsBrisbaneQLD4108Australia

Off-flavour taint of aquaculture products is a global issue reducing consumer confidence in the farmed produce as they are taken up via the gills of fish,and deposited in the lipids of the *** the fish are not purged,resulting undesirable muddy earthy flavour taint can be tasted by *** undesirable flavour and odour is caused by the terpenoid compounds namely geosmin and 2-methylisoborneol,produced as secondary metabolites by certain bacteria including the cyanobacteria and *** strategies to remediate the problem rely on treating the symptoms not the cause and involve the use of time consuming purging methods and costly *** control using bacteriophages,specific to the problem causing bacteria,offers a natural alternative to chemical control,which might reduce further complications of copper based algaecides and its subsequent implications on water *** an adaptation of such biological control approach streptomycetes isolated from barramundi ponds were tested for their susceptibility to streptophages to understand whether host destruction via phage lysis would subsequently eliminate off-flavour taint productions by these *** the determination of the streptophage susceptibility of the isolates one of the most odourous streptomycete species(USC-14510)was selected to be tested further using different pond simulations resembling real-life *** was tested as the indicator of off-flavour taint production and as it has been previously reported that the cyanobacteria-actinomycete interactions occurring in ponds result in even greater levels of geosmin and 2-methylisoborneol,the geosmin levels for the isolate in the presence of cyanobacteria and streptophages were also *** indicated that the highly odourous Streptomyces species(USC-14510)once infected with streptophages,can lose its capacity to produce off-flavour *** simulation studies also revealed geosmin production

关键词： Actinomycetes Streptomycetes Streptophages Barramundi Aquaculture Geosmin

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