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| Effects of Naphthalene, Phenanthrene and Pyrene on Growth of Microcystis aeruginosa |
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| KeyWord:Microcystis aeruginosa; polycyclic aromatic hydrocarbons; specific growth rate; photosynthesis; chlorophyll a; photosynthetic rate |
| Author Name | Affiliation | | WANG Xiu-cui | College of Resource and Environmental Science, Institute of Organic Contaminant Control and Soil Remediation, Nanjing Agricultural University, Nanjing 210095, China | | GAO Yan-zheng | College of Resource and Environmental Science, Institute of Organic Contaminant Control and Soil Remediation, Nanjing Agricultural University, Nanjing 210095, China | | ZHU Xue-zhu | College of Resource and Environmental Science, Institute of Organic Contaminant Control and Soil Remediation, Nanjing Agricultural University, Nanjing 210095, China | | JIN Li | College of Resource and Environmental Science, Institute of Organic Contaminant Control and Soil Remediation, Nanjing Agricultural University, Nanjing 210095, China | | WANG Wan-qing | College of Resource and Environmental Science, Institute of Organic Contaminant Control and Soil Remediation, Nanjing Agricultural University, Nanjing 210095, China | | YANG Yan | College of Resource and Environmental Science, Institute of Organic Contaminant Control and Soil Remediation, Nanjing Agricultural University, Nanjing 210095, China |
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| Abstract: |
| A laboratory culture was conducted to examine the effects of naphthalene, phenanthrene and pyrene on the growth and photosynthesis of Microcystis aeruginosa. Phenanthrene had greater effect on the growth of M. aeruginosa than naphthalene and pyrene did. Both pyrene and naphthalene at low doses promoted the growth of M. aeruginosa, while all high doses of PAHs significantly decreased its growth rates. Specific growth rates had a significant negative correlation with PAH concentrations（P<0.05）. Pearson correlation coefficients were between -0.884 and -0.653. The toxicities of both naphthalene and pyrene to M. aeruginosa reduced as the exposure time extended. Phenanthrene exposure caused an irreversible toxicity. The inhibition of phenanthrene and pyrene on M. aeruginosa growth was caused by the reduction of chlorophyll a content and photosynthesis rate in M. aeruginosa. |
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