, Volume 121, Issue 3, pp 323–329

Natural hyperthermia and expression of the heat shock protein Hsp70 affect developmental abnormalities in Drosophila melanogaster

  • S. P. Roberts
  • M. E. Feder

DOI: 10.1007/s004420050935

Cite this article as:
Roberts, S. & Feder, M. Oecologia (1999) 121: 323. doi:10.1007/s004420050935


We demonstrate that natural heat stress on wild larval Drosophila melanogaster results in severe developmental defects in >10% of eclosing adults, and that increased copy number of the gene encoding the major inducible heat shock protein of D. melanogaster, Hsp70, is sufficient to reduce the incidence of such abnormalities. Specifically, non-adult D. melanogaster inhabiting necrotic fruit experienced severe, often lethal heat stress in natural settings. Adult flies eclosing from wild larvae that had survived natural heat stress exhibited severe developmental anomalies of wing and abdominal morphology, which should dramatically affect fitness. The frequency of developmental abnormalities varied along two independent natural thermal gradients, exceeding 10% in adults eclosing from larvae developing in warm, sunlit fruit. When exposed to natural heat stress, D. melanogaster larvae with the wild-type number of hsp70 genes (n=10) developed abnormal wings significantly more frequently than a transgenic sister strain with 22 copies of the hsp70 gene.

Key words Development Natural hyperthermia Heat shock proteins Hsp70 Drosophila melanogaster 

Copyright information

© Springer-Verlag Berlin Heidelberg 1999

Authors and Affiliations

  • S. P. Roberts
    • 1
  • M. E. Feder
    • 1
  1. 1.Department of Organismal Biology and Anatomy, The University of Chicago, 1027 East 57th Street, Chicago, IL 60637, USA e-mail: m-feder@uchicago.edu Tel.: +1-773-7028096, Fax: +1-312-7730037US

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