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dc.contributor.authorvan Rosmalen, Laura
dc.contributor.authorvan Dalum, Mattis Jayme
dc.contributor.authorHazlerigg, David
dc.contributor.authorHut, Roelof A.
dc.date.accessioned2020-12-03T12:43:04Z
dc.date.available2020-12-03T12:43:04Z
dc.date.issued2020-10-21
dc.description.abstractTo optimally time reproduction, seasonal mammals use a photoperiodic neuroendocrine system (PNES) that measures photoperiod and subsequently drives reproduction. To adapt to late spring arrival at northern latitudes, a lower photoperiodic sensitivity and therefore a higher critical photoperiod for reproductive onset is necessary in northern species to arrest reproductive development until spring onset. Temperature–photoperiod relationships, and hence food availability–photoperiod relationships, are highly latitude dependent. Therefore, we predict PNES sensitivity characteristics to be latitude dependent. Here, we investigated photoperiodic responses at different times during development in northern (tundra or root vole, <i>Microtus oeconomus</i>) and southern vole species (common vole, <i>Microtus arvalis</i>) exposed to constant short (SP) or long photoperiod (LP). Although the tundra vole grows faster under LP, no photoperiodic effect on somatic growth is observed in the common vole. In contrast, gonadal growth is more sensitive to photoperiod in the common vole, suggesting that photoperiodic responses in somatic and gonadal growth can be plastic, and might be regulated through different mechanisms. In both species, thyroid-stimulating hormone β-subunit (<i>Tshβ</i>) and iodothyronine deiodinase 2 (<i>Dio2</i>) expression is highly increased under LP, whereas <i>Tshr</i> and <i>Dio3</i> decrease under LP. High <i>Tshr</i> levels in voles raised under SP may lead to increased sensitivity to increasing photoperiods later in life. The higher photoperiodic-induced <i>Tshr</i> response in tundra voles suggests that the northern vole species might be more sensitive to thyroid-stimulating hormone when raised under SP. In conclusion, species differences in developmental programming of the PNES, which is dependent on photoperiod early in development, may form different breeding strategies as part of latitudinal adaptation.en_US
dc.identifier.citationvan Rosmalen, van Dalum, Hazlerigg, Hut. Gonads or body? Differences in gonadal and somatic photoperiodic growth response in two vole species. Journal of Experimental Biology. 2020;223en_US
dc.identifier.cristinIDFRIDAID 1848179
dc.identifier.doi10.1242/jeb.230987
dc.identifier.issn0022-0949
dc.identifier.issn1477-9145
dc.identifier.urihttps://hdl.handle.net/10037/19972
dc.language.isoengen_US
dc.publisherThe Company of Biologistsen_US
dc.relation.ispartofvan Dalum, M.J. (2022). Evolution of seasonal adaptations in voles - a physiological and genetic approach. (Doctoral thesis). <a href=https://hdl.handle.net/10037/24919>https://hdl.handle.net/10037/24919</a>.
dc.relation.journalJournal of Experimental Biology
dc.rights.accessRightsopenAccessen_US
dc.rights.holder© 2020. Published by The Company of Biologists Ltd |en_US
dc.subjectVDP::Mathematics and natural science: 400::Zoology and botany: 480en_US
dc.subjectVDP::Matematikk og Naturvitenskap: 400::Zoologiske og botaniske fag: 480en_US
dc.titleGonads or body? Differences in gonadal and somatic photoperiodic growth response in two vole speciesen_US
dc.type.versionacceptedVersionen_US
dc.typeJournal articleen_US
dc.typeTidsskriftartikkelen_US
dc.typePeer revieweden_US


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