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SUMMARY 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 i...
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ftciteseerx:oai:CiteSeerX.psu:10.1.1.1035.8479 2023-05-15T17:42:35+02:00 _ Laura Vesala Tiina S Salminen Vladimir Kostál Helena Zahradníčková Anneli Hoikkala The Pennsylvania State University CiteSeerX Archives application/pdf http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.1035.8479 http://jeb.biologists.org/content/jexbio/215/16/2891.full.pdf en eng http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.1035.8479 http://jeb.biologists.org/content/jexbio/215/16/2891.full.pdf Metadata may be used without restrictions as long as the oai identifier remains attached to it. http://jeb.biologists.org/content/jexbio/215/16/2891.full.pdf text ftciteseerx 2020-02-16T01:15:39Z SUMMARY 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 147nmolmg -1 fresh mass, which is among the largest reported accumulations of this compound in insects. Supplementary material available online at Text Northern Finland Unknown |
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ftciteseerx |
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SUMMARY 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 147nmolmg -1 fresh mass, which is among the largest reported accumulations of this compound in insects. Supplementary material available online at |
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The Pennsylvania State University CiteSeerX Archives |
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Text |
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Laura Vesala Tiina S Salminen Vladimir Kostál Helena Zahradníčková Anneli Hoikkala |
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Laura Vesala Tiina S Salminen Vladimir Kostál Helena Zahradníčková Anneli Hoikkala _ |
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Laura Vesala Tiina S Salminen Vladimir Kostál Helena Zahradníčková Anneli Hoikkala |
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Laura Vesala |
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http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.1035.8479 http://jeb.biologists.org/content/jexbio/215/16/2891.full.pdf |
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Northern Finland |
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Northern Finland |
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http://jeb.biologists.org/content/jexbio/215/16/2891.full.pdf |
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http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.1035.8479 http://jeb.biologists.org/content/jexbio/215/16/2891.full.pdf |
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