ULTRASTRUCTURAL ALTERATIONS IN CADMIUM EXPOSED CELLS OF CHARA ZEYLANICAAbstract
The Characean alga, Chara zeylanica was experimentally exposed to Cadmium ion concentrations ranging from 1, 3, 5, 7 and 10 ppb for 7 days. The ultrastructural studies and TEM X-ray microanalysis were performed on the alga exposed to 10 ppb cadmium ion concentration after 7 days of the treatment period. A fine structural examination of the cells revealed that in Cd-treated cells, the cell wall showed the absence of undulating layers, more compactness in their arrangement and much lesser in thickness than the control cells. TEM studies showed striking changes in the plastids of treated algae. They were completely devoid of starch grains. The cell organelles were lacking in the cytoplasm, but it showed the presence of several myelin-like bodies.
P. S. Punita
Department of Botany, Science Faculty, The M.S. University of Baroda, Baroda, Gujarat, India
21 July 2014
24 October 2014
28 November 2014
01 December 2014