Heat hardening capacity in Drosophila melanogaster is life stage-specific and juveniles show the highest plasticity
Nasiri Moghadam, N., Ketola, T., Pertoldi, C., Bahrndorff, S., & Kristensen, T. N. (2019). Heat hardening capacity in Drosophila melanogaster is life stage-specific and juveniles show the highest plasticity. Biology Letters, 15(2), Article 20180628. https://doi.org/10.1098/rsbl.2018.0628
Published inBiology Letters
DisciplineEkologia ja evoluutiobiologiaBiologisten vuorovaikutusten huippututkimusyksikköEcology and Evolutionary BiologyCentre of Excellence in Biological Interactions Research
© 2019 The Author(s)
Variations in stress resistance and adaptive plastic responses during ontogeny have rarely been addressed, despite the possibility that differences between life stages can affect species' range margins and thermal tolerance. Here, we assessed the thermal sensitivity and hardening capacity of Drosophila melanogaster across developmental stages from larval to the adult stage. We observed strong differences between life stages in heat resistance, with adults being most heat resistant followed by puparia, pupae and larvae. The impact of heat hardening (1 h at 35°C) on heat resistance changed during ontogeny, with the highest positive effect of hardening observed in puparia and pupae and the lowest in adults. These results suggest that immobile life stages (puparia and pupae) have evolved high plasticity in upper thermal limits whereas adults and larvae rely more on behavioural responses to heat stress allowing them to escape from extreme high temperatures. While most studies on the plasticity of heat resistance in ectotherms have focused on the adult life stage, our findings emphasize the crucial importance of juvenile life stages of arthropods in understanding the thermal biology and life stage-specific physiological responses to variable and stressful high temperatures. Failure to acknowledge this complication might lead to biased estimates of species' ability to cope with environmental changes, such as climate change. ...
PublisherThe Royal Society Publishing
ISSN Search the Publication Forum1744-9561
Dataset(s) related to the publicationhttp://dx.doi.org/10.5061/dryad.0908bq0
Publication in research information system
MetadataShow full item record
Related funder(s)Academy of Finland
Funding program(s)Academy Research Fellow, AoF
Additional information about fundingWe thank Danish Natural Science Research Council (DFF-8021-00014B to T.N.K.), Aalborg Zoo Conservation Foundation (AZCF: 3-2017 to C.P.) and Academy of Finland (278751 to T.K.).
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