Study on the Response of Microcystis aeruginosa to Microplastic Stress in Water
In order to reveal the stress mechanism of microplastics(MPs)on harmful algae,Microcystis aeruginosa,a typical cyanobacteria in eutrophic water,was taken as the research object to explore its response under the stress of polyethylene glycol terephthalate(PET)with different particle sizes and concentrations.The results showed that PET did not damage algal cells,but affected their growth and the synthesis and release of microcystins.Under PET stress of 10 μm,the growth of algal cells was significantly inhibited with the increase of PET concentration.Under the same particle size PET(100 mg/L)stress,its growth inhibition may be regulated by the down-regulation of the relative expression of photosynthesis-related genes.In addition,under 100 mg/L PET stress,intracellular microcystins decreased,which may be related to the inhibition of microalgae growth and the down-regulation of the relative expression of microcystins-related gene mcyA.
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