Light Intensity Influences Chromium Bioaccumulation and Toxicity in Scenedesmus acutus(Chlorophyceae)

摘要

The influence of light intensity on chromium uptake was studied in two strains of the freshwater unicellular alga Scenedesmus acutus(Chlorophyceae)having different sensitivity To Cr poisoning and light intensity. The two strains were sub- Jected to different Cr treatments at 3000 and 80 lux. Cr toxicity Was assessed by algal growth rate, recovery test, methylene blue Staining, and determination of photosynthetic activity. After 2 and 4 days of treatment, bioaccumulated chromium, cell dry mass, and protein and carbohydrate contents were also assessed.