Ammonium sulphate induced stress related alterations in the respiratory epithelium of the airbreathing organ of the catfishHeteropneustes fossilis (Bloch)
| Autor: | V. I. Paul, T. K. Banerjee |
|---|---|
| Rok vydání: | 1996 |
| Předmět: |
medicine.medical_specialty
Necrosis Regeneration (biology) General Medicine Biology Hyperplasia biology.organism_classification medicine.disease General Biochemistry Genetics and Molecular Biology Heteropneustes fossilis Endocrinology Internal medicine Respiration medicine Respiratory epithelium Respiratory system medicine.symptom General Agricultural and Biological Sciences Catfish |
| Zdroj: | Journal of Biosciences. 21:519-526 |
| ISSN: | 0973-7138 0250-5991 |
| Popis: | In this paper, histopathological changes in the inner lining of the accessory respiratory organ ofHeteropneustes fossilis following exposure to sublethal concentration (0.2 g I–1) of ammonium sulphate (3 mg I–1 total ammonia-N) has been described. The goblet cells show periodic increased followed by decreased secretory activities. Necrosis and shedding of the epithelial cells over the secondary lamellae cause periodic haemorrhages which lead to degeneration and decreased number of secondary lamellae. Subsequently regeneration takes place each time as evidenced by the appearance of inflammatory tissue. Fusion of more than one secondary lamellae is also common. Regeneration also leads to uncontrolled hyperplasia of haphazardly arranged epithelial cells. This hyperplasia causes increased distance of respiratory blood-air barrier in the secondary lamellae, leading to impaired normal aerial respiration |
| Databáze: | OpenAIRE |
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