[Expression of stress proteins of family HSP70 in response to cold in Myrmica ants from different geographic populations].

Expression of HSP70 is induced by stress factors, including sub-lethal chilling, but the role of HSP70 for overcoming consequenses of cold stress is not clear. If the role is positive, the level of HSP70 expression might be higher in populations from colder climates. By use of immunoblotting we investigated dynamics of HSP70 expression in response to cold stress in two Myrmica species from three localities of different latitude (50, 60 and 67 degrees N).