Analysis of digestive enzymes in different breeds of Bombyx mori in response to Beauveria bassiana infection
M Sheeba Praveena, G Savithri
The study has been focused to examine the digestive enzymes such as amylase, trerhalase and lipase in the blood of the three breeds viz., bivoltine double hybrid(CSR2 X CSR27) X (CSR6 X CSR 26), crossbreed (PM x CSR2) and bivoltine single hybrid (CSR2 × CSR4) of fifth instar silkworm Bombyx mori during the development of fungal pathogen Beauveria bassiana. The enzymes play a significant role in breaking down the complex food material into simpler micro-biomolecules for absorption and assimilation, to provide energy and necessary metabolites for appropriate growth and development of an organism. Varied levels enzymes activity was recorded in the selected silkworm breeds under the fungal pathogen induced stress conditions in the haemolymph of silkworm. Steady drop in amylase and trehalaseenzymes activity was noticed throughout the 5th instar larvae with Beauveria bassiana induced stress conditions in all the breeds selected for the investigation, whereas the lipase activity was declined in the early stages of infection then the enzyme activity was elevated in diseased silkworms. The results of thecurrent investigationindicated that the activity of the digestive enzymes such as amylase, trehalase and lipase was higher in bivoltine double hybrid followed by crossbreed and bivoltine single hybrid in healthy and disease induced larvaethat indicates higher positive correlation with higher resistance.
M Sheeba Praveena, G Savithri. Analysis of digestive enzymes in different breeds of Bombyx mori in response to Beauveria bassiana infection. International Journal of Entomology Research, Volume 6, Issue 3, 2021, Pages 129-134