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1

Changes in midgut and brain proteins in Morimus funereus larvae depending on nutritive substrate

100%
Ilijin L., Jankovic-Tomanic M., Mitic M., Vlahovic M., Lazarevic M., Lazarevic J., Peric-Mataruga V., Prolic Z., Nenadovic V.
Folia Biologica
|
2003
|
vol. 51
|
issue 3-4
207-211
EN
The response of Morimus funereus larvae to total starvation and refeeding with qualitatively different nutritive substrates (artificial diets supplemented with yeast as a source of B complex vitamins or with a digestibility reducer-tannic acid) was examined in this paper. Refeeding resulted in a compensatory increase of larval growth. Feeding and refeeding with qualitatively different nutritive substrates affected both quality and quantity of midgut and brain proteins. The observed differences suggest the possible switching of enzyme isoforms in M. funereus midgut and changes in synthesis/secretion of neurohormones, depending on food presence and its nutritional value.
2

Effect of starvation on free amino acids pool in an organophosphorus-insecticide-resistant and susceptible strain of Tribolium castaneum

100%
Sallem M., Shakoori A.
Folia Biologica
|
1995
|
vol. 43
|
issue 3-4
131-135
EN
Proline constitued 51.5% and 43.5% of the total free amino acids (FAA) pool in the adult and sixth-instar larvae of the insecticide-resistant strains CTC 12 of Tribolium castaneum, whereas in the insecticide susceptible strain FSS II of T. castaneum the values are 50.5% aND 44.7% resp. Starvation for 6 days resulted in a significant increase in the FAA of sixth-instar larvae of CTC-12 except for tyrosine.In adult beetles aspartic acid (Asp), histidine (His), and lysine (Lys) increased signigficantly, whereas all other amino acids decreased.In the FSS-II strains the larvae did not show any drastic response to starvation.In the adult beetles, however, Asp, glycine, alanine, His, and Lys increased significantly, whike several other amino acids were depleted during starvation.
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