Effects of heavy metals on some proximate composition of Eichhornia crassipes

  • VJ Odjegba, Department of Botany and Microbiology, University of Lagos, Akoka, Yaba, Lagos, Nigeria
  • IO Fasidi Department of Botany and Microbiology, University of Ibadan, Ibadan, Oyo State, Nigeria


Effects of 8 heavy metals (Ag, Cd, Cr, Cu, Hg, Ni, Pb and Zn) on the total chlorophyll, foliar proline, and protein and starch contents of Eichhornia crassipes was investigated. Plantlets were grown in quarter-strength Hoagland's solution and supplemented with 0, 0.1, 0.3, 0.5, 1.0, 3.0 and 5.0 mM of each of the metals for 3 weeks. There was a significant reduction (p≤0.05) in total chlorophyll, protein and starch contents, while foliar proline increased significantly. These effects were however dependent on the nature of the metal, its concentration and duration of exposure.

Journal of Applied Sciences and Environmental Management Vol. 10(1) 2006: 83-87

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