Sub-littoral and supra-littoral amphipods respond differently to acute thermal stress
Thermal tolerance was determined in two closely related amphipod species from contrasting environments (sub-littoral and supra-littoral zones of the sea) using HSP expression and the activity of antioxidant enzymes. The levels of HSP70 and small HSPs present in untreated control animals were higher...
Gespeichert in:
Veröffentlicht in: | Comparative Biochemistry and Physiology Part B: Biochemistry and Molecular Biology 2010-04, Vol.155 (4), p.413-418 |
---|---|
Hauptverfasser: | , , |
Format: | Artikel |
Sprache: | eng |
Schlagworte: | |
Online-Zugang: | Volltext |
Tags: |
Tag hinzufügen
Keine Tags, Fügen Sie den ersten Tag hinzu!
|
Zusammenfassung: | Thermal tolerance was determined in two closely related amphipod species from contrasting environments (sub-littoral and supra-littoral zones of the sea) using HSP expression and the activity of antioxidant enzymes. The levels of HSP70 and small HSPs present in untreated control animals were higher in the supra-littoral
Orchestia gammarellus
than in the sub-littoral
Gammarus oceanicus
. Under the acute thermal stress, HSP levels increased less strongly in
O. gammarellus
than in
G. oceanicus
. Activities of antioxidant enzymes peroxidase, catalase and glutathione S-transferase, were more pronounced in the supra-littoral
O. gammarellus
then in the sub-littoral
G. oceanicus
. We conclude that the environmental temperature regime modifies key cellular defense mechanisms in amphipods. Higher levels of constitutive HSP synthesis and higher levels of antioxidant enzymes in the supra-littoral species likely reflects adaptation to this highly thermally variable environment. |
---|---|
ISSN: | 1096-4959 1879-1107 |
DOI: | 10.1016/j.cbpb.2010.01.004 |