ISSN:
1615-6102
Keywords:
Carbamate herbicide
;
Euglena gracilis
;
Nucleus
;
Cytoskeleton
;
Ultrastructural alterations
Source:
Springer Online Journal Archives 1860-2000
Topics:
Biology
Notes:
Summary Ultrastructural abnormalities of various kinds and severity appeared inEuglena gracilis green cells after a 48-hour exposure to 4 × 10−4M of isoprophyl-N-phenylcarbamate (IPC), a widely used herbicide thought to affect microtubules and/or microtubule organizing centers in susceptible plant and animal species. A high proportion of cells contained nuclei in the G 2 phase of the cycle; in a significant percentage of organisms, however, structural aberrations of the nucleolus and chromosomes were evident. The pellicle outline, chloroplasts, mitochondria, and dictyosomes were also affected. The cytoplasm was rich in dense bodies which sometimes showed granular, fibrillar or tubular materials. Furthermore IPC partially inhibited flagellum regeneration after mechanical amputation. The mechanism by which IPC causes these responses remains unclear. Nevertheless, some indications suggest that the herbicide acts primarily on microtubule organizing centers. However, mitochondria, chloroplasts and nuclear constituents appear as possible additional targets of the compound.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF01281966
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