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Myo-inositol as a main metabolite in overwintering flies: seasonal metabolomic profiles and cold stress tolerance in a northern drosophilid fly

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Vesala, L., Salminen, T., Koštál, V., Zahradnícková, H., & Hoikkala, A. (2012). Myo-inositol as a main metabolite in overwintering flies: seasonal metabolomic profiles and cold stress tolerance in a northern drosophilid fly. Journal of Experimental Biology, 215(16), 2891-2897. https://doi.org/10.1242/jeb.069948
Published in
Journal of Experimental Biology
Authors
Vesala, Laura |
Salminen, Tiina |
Koštál, Vladimir |
Zahradnícková, Helen |
Hoikkala, Anneli
Date
2012
Discipline
Ekologia ja evoluutiobiologiaEcology and Evolutionary Biology
Copyright
© 2012 The Company of Biologists Ltd. Published in this repository with the kind permission of the publisher.

 
Coping with seasonal changes in temperature is an important factor underlying the ability of insects to survive over the harsh winter conditions in the northern temperate zone, and only a few drosophilids have been able to colonize sub-polar habitats. Information on their winter physiology is needed as it may shed light on the adaptive mechanisms of overwintering when compared with abundant data on the thermal physiology of more southern species, such as Drosophila melanogaster. Here we report the first seasonal metabolite analysis in a Drosophila species. We traced changes in the cold tolerance and metabolomic profiles in adult Drosophila montana flies that were exposed to thermoperiods and photoperiods similar to changes in environmental conditions of their natural habitat in northern Finland. The cold tolerance of diapausing flies increased noticeably towards the onset of winter; their chill coma recovery times showed a seasonal minimum between late autumn and early spring, whereas their survival after cold exposure remained high until late spring. The flies had already moderately accumulated glucose, trehalose and proline in autumn, but the single largest change occurred in myo-inositol concentrations. This increased up to 400-fold during the winter and peaked at 147 nmol mg−1 fresh mass, which is among the largest reported accumulations of this compound in insects. ...
Publisher
The Company of Biologists
ISSN Search the Publication Forum
0022-0949
Keywords
kylmäkoomasta toipuminen kryoprotektantit kylmään sopeutuminen lisääntymisdiapaussi vuodenaikaisuus chill coma recovery cold tolerance cryoprotectant cold acclimation reproductive diapause seasonality kylmänkestävyys
DOI
https://doi.org/10.1242/jeb.069948
URI

http://urn.fi/URN:NBN:fi:jyu-201212123333

Publication in research information system

https://converis.jyu.fi/converis/portal/detail/Publication/21734101

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