On studying the effect of simazine on Protosiphon botryoides and Anabaena variabilis, data revealed that chlorophyll a content and dry weight were decreased with the increase in simazine concentration. High concentration of simazine (0.8 mg L(-1)) reduced gross photosynthesis and carbohydrate content, whereas protein content and respiration rate were increased. Algal cell recovery from simazine toxic effect occurred after 2 and 4 days for Anabaena and Protosiphon, respectively, which may be attributed to the difference in algal genotype of the tested organisms.
Copyright 2001 Academic Press.