The response mechanisms to high zinc was investigated among three cyanobacterial strains grown under two light regimes.
Photosystem II is more sensitive to high zinc compared to Photosystem I in the three studied strains.
High light increases the zinc uptake in two Microcystis aeruginosa strains, but not in Synechocystis sp..
Combined high light and high zinc treatment is lethal for the toxic M. aeruginosa CPCC299.