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      https://www.ias.ac.in/article/fulltext/jbsc/041/03/0331-0339

    • Keywords

       

      20-Hydroxyecdysone; canalization; desiccation; developmental heterochrony; Drosophila melanogaster

    • Abstract

       

      Stressful environments are known to perturb developmental patterns in insects. In the purview of desiccation as astressor, relatively little is known about the developmental consequences linked with desiccation tolerance. In thisstudy, we have particularly focused on the exploration of the temporal profile of postembryonic development inresponse to desiccation exposure in Drosophila melanogaster and the associated trade-offs. We document a correlationbetween variations in 20-hydroxyecdysone levels and the altered timing of metamorphic events during the lifecycle. Following desiccation, we observed an extension in the larval longevity whereas the duration of the pupal andadult stages was significantly shortened. Alternately, feeding of 20-hydroxyecdysone apparently led to the restorationof the normal temporal pattern of development in the desiccated group. In spite of the desiccation-responsiveheterochronic shifts in development, the overall lifespan post recovery remained almost unaltered among thedesiccated and undesiccated groups suggesting plasticity in developmental control. This observation reminisces

      ‘canalization-like’ phenomenon that buffers alterations in the overall lifespan. We thus identified a desiccation responsiveperiod in the lifespan of D. melanogaster during which variations in ecdysone levels are capable to alter thetemporal course of development.

    • Author Affiliations

       

      LEENA THORAT1 DASHARATH P OULKAR2 KAUSHIK BANERJEE2 BIMALENDU B NATH1

      1. Stress Biology Research Laboratory, Department of Zoology, Savitribai Phule Pune University, Pune 411 007, India
      2. National Referral Laboratory, National Research Centre for Grapes, Pune 412 307, India
    • Dates

       
  • Journal of Biosciences | News

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