The ultraviolet (mainly UV-B) radiation enhanced by depleted ozone layer in stratosphere has caused considerable concern. Cyanobacterium use in studying the effects of UV-B on living organisms presents many advantages because of its importance in ecological system and unique status in biological evolution. Now there are fewer reports about the researches concerned with the effects of UV-B on cyanobacterium and as a result the paper introduce the concerned domestic and international researches in this field, which include effects of UV-B on biomass, photosynthetic systems, nitrogen fixation and...
