TOXICITY OF COPPER ON Desmodesmus subspicatus GROWTH


Guclu Z.

FRESENIUS ENVIRONMENTAL BULLETIN, cilt.21, ss.1703-1707, 2012 (SCI İndekslerine Giren Dergi) identifier identifier

  • Cilt numarası: 21
  • Basım Tarihi: 2012
  • Dergi Adı: FRESENIUS ENVIRONMENTAL BULLETIN
  • Sayfa Sayıları: ss.1703-1707

Özet

Cells of Desmodesmus subspicatus 54.80 were used to examine the toxicity of copper sulphate (CuSO4.7H(2)O). The experiments were performed according to OECD 201 standard procedures (International Organization for Standardization; 1984). Parameters measured were the number of cells as well as chlorophyll-a, intracellular and extracellular Cu contents. The number of cells and chlorophyll-a content decreased from 58.000 to 22.667 cells ml(-1) and from 0.993 to 0.331 mg L-1, with increasing Cu concentrations, respectively. The 96-h EC50 value for D. subspicatus determined was 2.447 mg L-1 Cu. Intracellular copper increased from 9.626 to 67.793 x 10(-4) ng Cu per cell whereas extracellular copper increased from 7.011 to 138.233 10(-4) ng Cu per cell of D. subspicatus exposed to 1 and 5 mg Cu L-1.