Differentially forms of nitrogen regulates the response of Microcystis aeruginosa to nanoplastics under environmentally relevant nitrogen concentration

As an essential primary producer, cyanobacteria play an important role in the global cycle for both carbon and nitrogen in the ecosystems. Though the influence of nanoplastics on the carbon metabolism of cyanobacteria, especial Microcystis aeruginosa, a dominant species causing cyanobacterial blooms, is well studied, little is known about nanoplastics affecting the nitrogen metabolism. Overall design: we show that the amino-modified polystyrene nanoplastics (PS-NH2) promote the nitrogen consumption, microcystins synthesis and release of M. aeruginosa under environmentally relevant nitrogen concentration of nitrate, ammonium and urea.