THE INFLUENCE OF INCREASED REARING DENSITY ON MEDIAL PROTOCEREBRAL NEUROSECRETORY NEURONS OF LYMANTRIA DISPAR L. CATERPILLARS

摘要

Morphometric changes of A1, A1' and A2 protocerebral dorsomedial neurosecretory neurons, total brainprotein content and brain protein profiles were analyzed in 4 th instar Lymantria dispar larvae under elevated rearingdensity, i.e. under intense stress when 5 larvae were kept in a petri dish (V = 80 ml), less intense stress when 5 larvaewere kept in a plastic cup (V = 300 ml). In the control samples the larvae were reared in isolated conditions. Proteinpattern changes in the brain were observed. Proteins with the following molecular masses: 30, 14, 10 and 3.4-2.5 kDwere detected in the experimental groups. The size and cytological characteristics of protocerebral dorsomedialneurosecretory neurons were changed under elevated rearing density.