Desiccation stress response of Bombina variegata tadpoles
2022
Аутори:
Kijanović, AnaVukov, Tanja
Mirč, Marko
Mitrović, Aleksandar
Prokić, Marko
Radovanović, Tijana
Gavrilović, Branka
Despotović, Svetlana
Gavrić, Jelena
Petrović, Tamara
Tomašević Kolarov, Nataša
Остала ауторства
Crnobrnja-Isailović, JelkaVukov, Tanja
Vučić, Tijana
Tomović, Ljiljana
Тип документа:
Конференцијски прилог (Објављена верзија)
,
© 2022 Institute for Biological Research "Siniša Stanković" – National Institute of Republic of Serbia, University of Belgrade
Метаподаци
Приказ свих података о документуАпстракт:
Many amphibian species inhabit temporary aquatic habitats for reproduction to
maximize larval growth under favorable conditions but accelerate developmental rate
to rapidly undergo metamorphosis under stress conditions when high desiccation risk
exists. Corticosterone, one of the most important vertebrate stress hormone controls
development, metabolism, and skeletal growth and together with thyroid hormone
have a critical role in anuran metamorphosis under stress conditions. Here we
compare the hormonal variation of corticosterone (CORT) in the yellow-bellied toad
Bombina variegata tadpoles in response to different water levels (constant highcontrol, constant low, constant high+exogenous CORT) and the corticosterone
inhibitor- metyrapone (MET) (treatment constant low water level+MET). Also, we
investigated the effects of CORT and MET on life-history and morphological traits at
metamorphosis. We found that B. variegata tadpoles cannot accelerate the
developmental rate in response to pond drying. The constant low water level did not
alter whole-body content of CORT and it did not significantly differ from high water
level treatment with exogenous CORT. However, individuals from high water level with
exogenous CORT have prolonged development, the highest mortality rate, the smallest
body size and mass, and the widest but the shortest tails at metamorphosis. Constant
low water level with MET decreased the whole-body content of CORT and it was
significantly different between all groups, but it did not affect the developmental rate
and tail shape although these tadpoles have intermediate size and mass between high
water levels with exogenous CORT and control. We show that responsiveness to pond
drying of Bombina variegata and its short larval period is probably associated with
modified endocrine signaling pathway that control tadpole metamorphosis.
Constitutively high whole-body content of CORT which was unaltered by pond drying
leads us to conclusion that Bombina variegata development may be canalized but more
research is needed.
У:
- Crnobrnja-Isailović J, Vukov T, Vučić T, Tomović Lj, editors. Program and Book of Abstracts: the 21st European Congress of Herpetology; 2022 Sep 5-9; Belgrade, Serbia. Belgrade: Institute for Biological Research "Siniša Stanković"– National Institute of Republic of Serbia, University of Belgrade; 2022. p. 158.