Adjustment of L1 neurosecretory neuron activity in response to different stressors in gypsy moth caterpillars
2015
Authors:
Ilijin, LarisaMrdaković, Marija
Perić Mataruga, Vesna
Lazarević, Jelica
Matić, Dragana
Todorović, Dajana
Vlahović, Milena
Document Type:
Article (Published version)
,
© the Serbian Biological Society
Metadata
Show full item recordAbstract:
Gypsy moth caterpillars were exposed to an increased rearing temperature
of 35 degrees C and diet, supplemented with Cd, a heavy metal pollutant,
and tannic acid, a plant secondary metabolite. After 3 days' exposure to
stressors, changes in the number, morphometric parameters of L1
neurosecretory neurons (nsn) (sizes of the nsn and their nuclei), and
the quantity of neurosecretory material in the cytoplasm of the neurons
were estimated. Acute exposure to the high temperature of 35 degrees C
induced increases in the number of L1 nsn, their size and the size of
their nuclei with prolonged exposure time. After acute exposure to
different Cd concentrations, the number of L1 nsn was reduced, their
size increased and the size of their nuclei decreased. Together with the
enhanced relative density of the cytoplasm, our results point to an
intensive synthesis and retention of neurosecretory material in the
neurons. The relative density of the neurosecretory material in the
cytoplasm increased at the thermal treatment, suggesting intensive
synthesis and secretory activity in L1 nsn. Caterpillars reared on an
artificial substrate with the addition of high concentrations of tannic
acid (TA) showed a decreased number of nsn, increased cell size and
decreased size of their nuclei. The reduction in the relative density of
the cytoplasm led us to conclude that this treatment induced a high
synthetic activity of L1 nsn.
Keywords:
L1 neurons; Cd; high temperature; tannic acid; Lymantria disparSource:
Archives of Biological Sciences, 2015, 67, 3, 965-972
DOI: 10.2298/ABS141210059I
ISSN: 0354-4664