Cytological lesions in the midgut of Tribolium confusum larvae exposed to gamma radiation
The major cytological lesions in Tribolium confusum after irradiation were displayed by the midgut epithelium. At 24 hr following exposure to 5.3 kR, the regenerative cells called nidi appeared numerous. They gradually disappeared with increases in dosage and time in accordance with Arndt-Schulze's Law. The columnar epithelial cells and their nuclei appeared swollen and vacuolated on the fifth and twelfth day following exposure to 5.3 kR. They appeared disorganized and shed into the lumen of the midgut on the twelfth and fifth day following 50- and 70-kR irradiation, respectively. The basement membrane and the muscularis appeared loose on the fifth and twelfth day dollowing 70-kR irradiation. It was observed that once the catabolic activity, i.e., histolysis, was initiated in the midgut, it continued to accelerate with increasing dose and time. Thus, the last effects at low doses, 5.3 and 10 kR, appeared as immediate effects at high doses, 50 and 70 kR. The differentiated cells, i.e., columnar epithelial cells, appeared radioresistant as compared to undifferentiated cells, i.e., regenerative cells, which appeared radiosensitive in accordance with the principle of Bergonie and Tribondeau.
- Research Organization:
- Panjab Univ., Lahore, Pakistan
- OSTI ID:
- 7086741
- Journal Information:
- J. Invertebr. Pathol.; (United States), Vol. 29:1
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
TRIBOLIUM
BIOLOGICAL RADIATION EFFECTS
COBALT 60
CYTOLOGY
DOSE-RESPONSE RELATIONSHIPS
EPITHELIUM
GAMMA RADIATION
IRRADIATION
LARVAE
ANIMALS
ARTHROPODS
BEETLES
BETA DECAY RADIOISOTOPES
BETA-MINUS DECAY RADIOISOTOPES
BIOLOGICAL EFFECTS
BIOLOGY
BODY
COBALT ISOTOPES
ELECTROMAGNETIC RADIATION
INSECTS
INTERMEDIATE MASS NUCLEI
INTERNAL CONVERSION RADIOISOTOPES
INVERTEBRATES
IONIZING RADIATIONS
ISOMERIC TRANSITION ISOTOPES
ISOTOPES
MINUTES LIVING RADIOISOTOPES
NUCLEI
ODD-ODD NUCLEI
RADIATION EFFECTS
RADIATIONS
RADIOISOTOPES
TISSUES
YEARS LIVING RADIOISOTOPES
560154* - Radiation Effects on Animals- Basic Studies- (-1987)