Thermal plasticity is related to the hardening response of heat shock protein expression in two Bactrocera fruit flies.

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  • Author(s): Hu JT;Hu JT; Chen B; Chen B; Li ZH; Li ZH
  • Source:
    Journal of insect physiology [J Insect Physiol] 2014 Aug; Vol. 67, pp. 105-13. Date of Electronic Publication: 2014 Jun 30.
  • Publication Type:
    Journal Article; Research Support, Non-U.S. Gov't
  • Language:
    English
  • Additional Information
    • Source:
      Publisher: Elsevier Country of Publication: England NLM ID: 2985080R Publication Model: Print-Electronic Cited Medium: Internet ISSN: 1879-1611 (Electronic) Linking ISSN: 00221910 NLM ISO Abbreviation: J Insect Physiol Subsets: MEDLINE
    • Publication Information:
      Publication: Oxford : Elsevier
      Original Publication: London ; New York : Pergamon Press
    • Subject Terms:
      Adaptation, Physiological* ; Gene Expression*; HSP70 Heat-Shock Proteins/*physiology ; HSP90 Heat-Shock Proteins/*physiology ; Heat-Shock Response/*physiology ; Tephritidae/*genetics ; Tephritidae/*physiology; Animals ; China ; HSP70 Heat-Shock Proteins/genetics ; HSP90 Heat-Shock Proteins/genetics ; Hot Temperature ; Introduced Species ; Larva/physiology ; Pupa/physiology ; Species Specificity
    • Abstract:
      It is generally believed that widely distributed species differ in their thermal plasticity from narrowly distributed species, but how differences in thermal plasticity are regulated at the molecular level remains largely unknown. Here, we conducted a comparative study of two closely related invasive fruit fly species, Bactrocera correcta and Bactroceradorsalis, in China. The two species had overlapping distributions, but B. dorsalis had a much wider range throughout the country and a longer invasive history than B. correcta. We first examined the effects of thermal acclimation on the ability of the two fruit flies to survive heat stress. The heat shock tolerance of B. dorsalis was significantly enhanced by heat hardening at 35, 37, 39 and 41°C, but that of B. correcta was only enhanced by heat hardening at 39°C and 41°C. Thus, the more widespread species has a higher thermal plasticity than the narrowly distributed species. We then determined the expression of Hsp70 and Hsp90 during different developmental stages and their responses to thermal hardening. The expression of both Hsp70 and Hsp90 in larvae was upregulated in response to heat hardening, starting at 35°C for B. dorsalis and at 39°C for B. correcta. The two species exhibited a highly consistent pattern of thermal response in terms of their heat shock survival rates and levels of Hsp gene expression. The results suggest that the difference in thermal plasticity may be responsible for the different distributions of the two species and that Hsp expression may be involved in the regulation of thermal plasticity. Our findings have important implications for the prediction of the thermal limits and ecological responses of related species in nature.
      (Copyright © 2014 Elsevier Ltd. All rights reserved.)
    • Contributed Indexing:
      Keywords: Acclimation; Bactrocera correcta; Bactrocera dorsalis; Heat shock protein; Invasive species; Thermal plasticity
    • Accession Number:
      0 (HSP70 Heat-Shock Proteins)
      0 (HSP90 Heat-Shock Proteins)
    • Publication Date:
      Date Created: 20140704 Date Completed: 20150330 Latest Revision: 20140721
    • Publication Date:
      20221213
    • Accession Number:
      10.1016/j.jinsphys.2014.06.009
    • Accession Number:
      24992713