Effects of lead(II) on the extracellular polysaccharide (EPS) production and colony formation of cultured Microcystis aeruginosa.

摘要: To investigate the effects of lead(II) on production extracellular polysaccharides (EPS), including bound (bEPS) and soluble (sEPS), colony formation Microcystis aeruginosa , cultures M. were exposed to four concentrations (5.0, 10.0, 20.0 40.0 mg/L) for 10 d under controlled laboratory conditions. The results showed that 5.0 10.0 mg/L stimulated growth throughout experiment while inhibited in first 2 exposure then it. As compared control group, significant increases bEPS sEPS observed treatments ( P < 0.05). Large formations not experiment. However, tested could significantly promote small middle colonies after 0.05), had best stimulatory effect. Lead(II) stimulate production, which conversely promoted formation, suggesting heavy metals might be contributing bloom-forming natural