Circadian clock of Drosophila montana is adapted to high variation in summer day lengths and temperatures prevailing at high latitudes
Photoperiodic regulation of the circadian rhythms in insect locomotor activity has been studied in several species, but seasonal entrainment of these rhythms is still poorly understood. We have traced the entrainment of activity rhythm of northern Drosophila montana flies in a climate chamber mimick...
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ftjyvaeskylaenun:oai:jyx.jyu.fi:123456789/49702 2024-02-04T10:03:15+01:00 Circadian clock of Drosophila montana is adapted to high variation in summer day lengths and temperatures prevailing at high latitudes Kauranen, Hannele Ala-Honkola, Outi Kankare, Maaria Hoikkala, Anneli 2016 9-18 application/pdf http://urn.fi/URN:NBN:fi:jyu-201605102464 eng eng Pergamon Journal of Insect Physiology 0022-1910 0 89 10.1016/j.jinsphys.2016.03.005 Kauranen, H., Ala-Honkola, O., Kankare, M., & Hoikkala, A. (2016). Circadian clock of Drosophila montana is adapted to high variation in summer day lengths and temperatures prevailing at high latitudes. Journal of Insect Physiology , 89 , 9-18. https://doi.org/10.1016/j.jinsphys.2016.03.005 CONVID_25600023 TUTKAID_69466 URN:NBN:fi:jyu-201605102464 http://urn.fi/URN:NBN:fi:jyu-201605102464 © 2016 Elsevier Ltd. This is a final draft version of an article whose final and definitive form has been published by Elsevier. Published in this repository with the kind permission of the publisher. openAccess seasonal adaptation photoperiod circadian clock timeless period lämpötila article http://purl.org/eprint/type/JournalArticle http://purl.org/coar/resource_type/c_2df8fbb1 acceptedVersion A1 2016 ftjyvaeskylaenun 2024-01-11T00:02:57Z Photoperiodic regulation of the circadian rhythms in insect locomotor activity has been studied in several species, but seasonal entrainment of these rhythms is still poorly understood. We have traced the entrainment of activity rhythm of northern Drosophila montana flies in a climate chamber mimicking the photoperiods and day and night temperatures that the flies encounter in northern Finland during the summer. The experiment was started by transferring freshly emerged females into the chamber in early and late summer conditions to obtain both non-diapausing and diapausing females for the studies. The locomotor activity of the females and daily changes in the expression levels of two core circadian clock genes, timeless and period, in their heads were measured at different times of summer. The study revealed several features in fly rhythmicity that are likely to help the flies to cope with high variation in the day length and temperature typical to northern summers. First, both the non-diapausing and the diapausing females showed evening activity, which decreased towards the short day length as observed in the autumn in nature. Second, timeless and period genes showed concordant daily oscillations and seasonal shifts in their expression level in both types of females. Contrary to Drosophila melanogaster, oscillation profiles of these genes were similar to each other in all conditions, including the extremely long days in early summer and the cool temperatures in late summer, and their peak expression levels were not locked to lights-off transition in any photoperiod. Third, the diapausing females were less active than the non-diapausing ones, in spite of their younger age. Overall, the study showed that D. montana clock functions well under long day conditions, and that both the photoperiod and the daily temperature cycles are important zeitgebers for seasonal changes in the circadian rhythm of this species. peerReviewed Article in Journal/Newspaper Northern Finland JYX - Jyväskylä University Digital Archive |
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JYX - Jyväskylä University Digital Archive |
op_collection_id |
ftjyvaeskylaenun |
language |
English |
topic |
seasonal adaptation photoperiod circadian clock timeless period lämpötila |
spellingShingle |
seasonal adaptation photoperiod circadian clock timeless period lämpötila Kauranen, Hannele Ala-Honkola, Outi Kankare, Maaria Hoikkala, Anneli Circadian clock of Drosophila montana is adapted to high variation in summer day lengths and temperatures prevailing at high latitudes |
topic_facet |
seasonal adaptation photoperiod circadian clock timeless period lämpötila |
description |
Photoperiodic regulation of the circadian rhythms in insect locomotor activity has been studied in several species, but seasonal entrainment of these rhythms is still poorly understood. We have traced the entrainment of activity rhythm of northern Drosophila montana flies in a climate chamber mimicking the photoperiods and day and night temperatures that the flies encounter in northern Finland during the summer. The experiment was started by transferring freshly emerged females into the chamber in early and late summer conditions to obtain both non-diapausing and diapausing females for the studies. The locomotor activity of the females and daily changes in the expression levels of two core circadian clock genes, timeless and period, in their heads were measured at different times of summer. The study revealed several features in fly rhythmicity that are likely to help the flies to cope with high variation in the day length and temperature typical to northern summers. First, both the non-diapausing and the diapausing females showed evening activity, which decreased towards the short day length as observed in the autumn in nature. Second, timeless and period genes showed concordant daily oscillations and seasonal shifts in their expression level in both types of females. Contrary to Drosophila melanogaster, oscillation profiles of these genes were similar to each other in all conditions, including the extremely long days in early summer and the cool temperatures in late summer, and their peak expression levels were not locked to lights-off transition in any photoperiod. Third, the diapausing females were less active than the non-diapausing ones, in spite of their younger age. Overall, the study showed that D. montana clock functions well under long day conditions, and that both the photoperiod and the daily temperature cycles are important zeitgebers for seasonal changes in the circadian rhythm of this species. peerReviewed |
format |
Article in Journal/Newspaper |
author |
Kauranen, Hannele Ala-Honkola, Outi Kankare, Maaria Hoikkala, Anneli |
author_facet |
Kauranen, Hannele Ala-Honkola, Outi Kankare, Maaria Hoikkala, Anneli |
author_sort |
Kauranen, Hannele |
title |
Circadian clock of Drosophila montana is adapted to high variation in summer day lengths and temperatures prevailing at high latitudes |
title_short |
Circadian clock of Drosophila montana is adapted to high variation in summer day lengths and temperatures prevailing at high latitudes |
title_full |
Circadian clock of Drosophila montana is adapted to high variation in summer day lengths and temperatures prevailing at high latitudes |
title_fullStr |
Circadian clock of Drosophila montana is adapted to high variation in summer day lengths and temperatures prevailing at high latitudes |
title_full_unstemmed |
Circadian clock of Drosophila montana is adapted to high variation in summer day lengths and temperatures prevailing at high latitudes |
title_sort |
circadian clock of drosophila montana is adapted to high variation in summer day lengths and temperatures prevailing at high latitudes |
publisher |
Pergamon |
publishDate |
2016 |
url |
http://urn.fi/URN:NBN:fi:jyu-201605102464 |
genre |
Northern Finland |
genre_facet |
Northern Finland |
op_relation |
Journal of Insect Physiology 0022-1910 0 89 10.1016/j.jinsphys.2016.03.005 Kauranen, H., Ala-Honkola, O., Kankare, M., & Hoikkala, A. (2016). Circadian clock of Drosophila montana is adapted to high variation in summer day lengths and temperatures prevailing at high latitudes. Journal of Insect Physiology , 89 , 9-18. https://doi.org/10.1016/j.jinsphys.2016.03.005 CONVID_25600023 TUTKAID_69466 URN:NBN:fi:jyu-201605102464 http://urn.fi/URN:NBN:fi:jyu-201605102464 |
op_rights |
© 2016 Elsevier Ltd. This is a final draft version of an article whose final and definitive form has been published by Elsevier. Published in this repository with the kind permission of the publisher. openAccess |
_version_ |
1789970526378131456 |