کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1975784 1060654 2010 6 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Sub-littoral and supra-littoral amphipods respond differently to acute thermal stress
موضوعات مرتبط
علوم زیستی و بیوفناوری بیوشیمی، ژنتیک و زیست شناسی مولکولی زیست شیمی
پیش نمایش صفحه اول مقاله
Sub-littoral and supra-littoral amphipods respond differently to acute thermal stress
چکیده انگلیسی

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.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Comparative Biochemistry and Physiology Part B: Biochemistry and Molecular Biology - Volume 155, Issue 4, April 2010, Pages 413–418
نویسندگان
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