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1

Effects of cadmium on protocerebral neurosecretory neurons and fitness components in Lymantria dispar L

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Ilijin L., Peric-Mataruga V., Radojicic R., Lazarevic J., Nenadovic V., Vlahovic M., Mrdakovic M.
Folia Biologica
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2010
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vol. 58
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issue 1-2
91-99
EN
Changes in fitness components including larval stage duration, relative growth rate (RGR), and mass of the gypsy moth, Lymantria dispar L. (Lepidoptera: Lymantriidae), were investigated in caterpillars fed a synthetic diet with or without a cadmiumsupplement (10, 30, 100, 250 Fg Cd/g dry food weight). Morphometric changes of large protocerebral dorsomedial A2 neurosecretory neurons, their nuclei and the electrophoresis profiles of brain proteins were analyzed in the 4th instar gypsy moths fed the examined diets. The duration of the fourth larval instars were prolonged and RGR and body mass reduced if the caterpillars were fed diets containing high concentrations of cadmium(100 and 250 Fg). The size of large A2 dorsomedial neurosecretory neurons and their nuclei were significantly higher in larvae fed the diets supplemented with 10, 100 and 250 Fg Cd. A large amount of neurosecretory material appeared in dorsomedial neurosecretory neurons in larvae fed diets with 100 and 250 Fg Cd. Differences in larval brain protein profiles in the region ofmolecularmass ranges (Mr) of 98kDa, 46kDa and 3.4-6.1 kDa were identified in the experimental groups.
2

The effect of temperature on midgut and brain protein profiles in Morimus funereus larvae (Coleptera: Cerambycidae)

100%
Ilijin L., Jankovic-Tomanic M., Mitic M., Vlahovic M., Prolic Z., Nenadovic V.
Folia Biologica
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2002
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vol. 50
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issue 3-4
103-105
EN
The 7-days shift of M. funereus larvae, from nature to a constant temperature of 23?C led to changes in midgut and brain protein quality and quantity. The changes in midgut protein profiles are characterized by an intensified protein band Mr of 29 kD, the absence of protein Mr of 22 kD and less intense bands Mr of 8.5-2.5 kD. Electrophoretic patterns of brain proteins showed less intense Mr of 66-2.5 kD protein bands.
3

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

84%
Ilijin L., Jankovic-Tomanic M., Mitic M., Vlahovic M., Lazarevic M., Lazarevic J., Peric-Mataruga V., Prolic Z., Nenadovic V.
|
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.
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