Fig. 6: A model depicting inorganic nitrogen exchange during algal-bacterial interactions.
From: Aerobic bacteria produce nitric oxide via denitrification and promote algal population collapse
Inorganic nitrogen exchange underlies the algal-bacterial dynamic interaction. Algae secrete nitrite in a growth-phase dependent manner, with a nitrite peak during mid exponential growth. Bacteria reduce algal-secreted nitrite to NO via denitrification. NO secreted by bacteria triggers algal death at stationary phase, during which algae produce NO. Algal-secreted NO propagates the death signal among algal cells, causing the collapse of the algal population.
