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The heat shock response of an antarctic alga is evident at 5°C

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Abstract

A subtidal seaweed collected in antarctic waters, Plocamium cartilagineum (L. Dix.), displayed induction of mRNAs encoding the 70 kDa heat shock protein (HSP70) and the ubiquitin polyprotein (UBI) when incubated at 5°C. Maximal induction of HSP70 mRNA was observed when the alga was incubated at 10°C for 1 h. Incubations at higher temperatures or for longer periods reduced the amount of HSP70 mRNA detected. Incubations at 20°C or greater resulted in cell death. These data indicate that dispite the unusually low temperature of induction, this macrophyte exhibits a heat shock response similar to that of other organisms at temperatures 5 to 10°C above usual growth conditions.

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Authors and Affiliations

  1. Department of Biochemistry, Microbiology and Molecular Biology, University of Maine, 5735 Hitchner Hall, 4469-5735, Orono, ME, USA

    Michael E. Vayda & Meng-Lan Yuan

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  1. Michael E. Vayda
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  2. Meng-Lan Yuan
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Vayda, M.E., Yuan, ML. The heat shock response of an antarctic alga is evident at 5°C. Plant Mol Biol 24, 229–233 (1994). https://doi.org/10.1007/BF00040590

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  • DOI: https://doi.org/10.1007/BF00040590

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