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Table 1 Effects of different concentrations of heavy metals and pentachlorophenol (Pent.) on the photosynthetic efficiency (slope coefficients) of C. reinhardtii after 24 h exposure.

From: Effects of Cu2+, Ni2+, Pb2+, Zn2+ and pentachlorophenol on photosynthesis and motility in Chlamydomonas reinhardtii in short-term exposure experiments

Concentration, Substances
mg l-1 Copper Nickel Lead Zinc Pent.
0.0 0.140 0.140 0.140 0.140 0.140
0.1 0.131 0.232 0.150 0.224 0.098
0.5 0.055 0.228 0.133 0.153 0.090
1.0 0.015 0.251 0.138 0.180 0.002
1.5 0.026 0.267 0.176 0.174  
2.0 0.047 0.244 0.160 0.165  
5.0      0.014
10.0      0.014
R - 0.66 0.64 0.60 - 0.54 - 0.83
  1. R - coefficient of correlation between increasing concentrations of the substances tested and the photosynthetic efficiency.