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