Influence of Cadmium on the Ultrastructure of Root-Tip Cells in the Winter Wheat Seedling

doi:10.3321/j.issn:1000-7091.1993.04.004

Abstract

Abstract: The influence of cadmium on the ultrastructure of root tip cells in the winter wheat seedling was evaluated by transmission electron microscope. No marked structural changes in the mitochondria were observed at lower level of CdCl₂2.5H₂O lower (10×10-6). But under the same condition the nuclei deformed and the chromatin slightly condensed. As the concentration of cadmium increased, the most apparent structural changes induced by cadmium were remarkable in nuclei and mitochondria. The swelling and disruption of nuclei and mitochondria, were observed in the seedling exposed to 80×10^-6CdCl₂2.5H₂O. The chromatin excessively condensed and the cristae were indistinct or disappeared. The results indicated that the ultrastructural changes of root-tip cells of winter wheat seedling induced by high concentration of cadmium were non-reversible.

Key words: Winter wheats' eedling, Cadmium, Root-tip cells, Ultrastructural changes

Hao Sicheng, Yang Qiwei, Sun Jianhua, Bi Ping. Influence of Cadmium on the Ultrastructure of Root-Tip Cells in the Winter Wheat Seedling[J]. ACTA AGRICULTURAE BOREALI-SINICA, 1993, 8(4): 16-19. doi: 10.3321/j.issn:1000-7091.1993.04.004.

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