Prothoracicotropic hormone-producing neurosecretory neurons and antioxidative defense in midgut of Lymantria dispar in trophic stress
2014
Authors:
Perić Mataruga, VesnaVlahović, Milena
Mrdaković, Marija
Todorović, Dajana
Matić, Dragana
Grčić, Anja
Ilijin, Larisa
Document Type:
Article (Published version)
,
© Tübi̇tak
Metadata
Show full item recordAbstract:
As a very invasive insect species, Lymantria dispar is adaptable and
sensitive to a changing environment. In insects the neuroendocrine
system first reacts to stress by production of prothoracicotropic
neurohormones (PTTH) that control ecdysteroid synthesis (morphogenetic
and stress hormones). In this article, we report changes in the L2'
brain neurosecretory neurons that synthesize PTTH in L. dispar larvae
after feeding on locust tree leaves (Robinia pseudoacacia), an
unsuitable host plant. Groups of larvae (n = 20 per experimental group)
were offered this in comparison with oak leaves (Quercus robur), a
suitable control diet, for 3 days after molting into the fourth instar.
L2' neurons and their nuclei were enlarged and the amount of
neurosecretory product in the cytoplasm was increased (15.5\%) after
consumption of locust tree leaves in comparison to the control.
Furthermore, activities of the following antioxidative defense
components were estimated: superoxide dismutase (SOD), catalase (CAT),
and amount of glutathione in the midgut. Higher SOD activity (13.85 +/-
0.9 U/mg prot.) and glutathione amount (0.56 +/- 0.06 mu MGSH/g tissue)
but unchanged CAT activity was found in the midgut of larvae offered
locust tree leaves when compared to the control.
Keywords:
Oak leaves; locust tree leaves; survival; superoxide dismutase; catalase; glutathioneSource:
Turkish Journal of Biology, 2014, 38, 3, 403-411Funding / projects:
- The effects of magnetic fields and other environmental stressors on the physiological responses and behavior of different species (RS-MESTD-Basic Research (BR or ON)-173027)
DOI: 10.3906/biy-1309-57
ISSN: 1300-0152
WoS: 000334166200012
Scopus: 2-s2.0-84898407652
URI
https://radar.ibiss.bg.ac.rs/handle/123456789/2293https://journals.tubitak.gov.tr/biology/abstract.htm?id=14878