BIOL370 Study Guide - Final Guide: Hsp70, High High, Thermoregulation
20 Feb 2015
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Document Summary
Continuous up-regulation of heat shock proteins in larvae, but not adults, of a polar insect. Background: belgica antarctica, a flightless midge and the largest free-living animal inhabiting. Larval midges can tolerate freezing all year round encased in ice: do so by preemptive continuous up-regulation of heat shock proteins (ex. hsp. Purpose of study: report the difference in survival strategies exploited by the insect during its larval and adult stage, study examined high temperature responses and capability of thermoregulation in both life stages. Thermoprotection generated by prior exposure to less severe high temperatures. Larvae exposed to less severe higher temperatures (15, 20, 25oc) --> reduced survival rate at 30oc: adults exposed to less severe higher temperature (25oc) --> increased survival rate at. 30oc: therefore, adults are capable of generating thermoprotection while the larvae cannot. Larvae maintained at 4oc --> all hsp transcripts expressed at high levels.
