Change search
ReferencesLink to record
Permanent link

Direct link
Is a change in juvenile hormone sensitivity involved in range expansion in an invasive beetle?
Stockholm University, Faculty of Science, Department of Zoology. University of Jyväskylä, Finland.
Number of Authors: 4
2015 (English)In: Frontiers in Zoology, ISSN 1742-9994, E-ISSN 1742-9994, Vol. 12, 20Article in journal (Refereed) Published
Abstract [en]

Introduction: It has been suggested that rapid range expansion could proceed through evolution in the endocrinological machinery controlling life-history switches. Based on this we tested whether the Colorado potato beetle, Leptinotarsa decemlineata, which has rapidly expanded its range across latitudinal regions in Europe, and shows photoperiodic adaptation in overwintering initiation, has different sensitivities to juvenile hormone (JH) manipulation along a latitudinal gradient. Results: A factorial experiment where beetles were reared either under a long or short day photoperiod was performed. Hormone levels were manipulated by topical applications. An allatostatin mimic, H17, was used to decrease and a juvenile hormone III analogue, pyriproxyfen, was used to increase the hormone levels. The effects of photoperiod and hormone manipulations on fecundity and overwintering related burrowing were monitored. Application of H17 decreased fecundity but did not induce overwintering related burrowing. Manipulation with pyriproxyfen increased fecundity and delayed burrowing. While small population-dependent differences in responsiveness to the topical application treatments were observed in fecundity, none were seen in overwintering related burrowing. Conclusions: The results indicate that the rapid photoperiodic adaptation manifested in several life-history and physiological traits in L. decemlineata in Europe is unlikely a result of population dependent differences in JH III sensitivity. While other endocrine factors cannot be ruled out, more likely mechanisms could be genetic changes in upstream elements, such as the photoperiodic clock or the insulin signaling pathway.

Place, publisher, year, edition, pages
2015. Vol. 12, 20
National Category
URN: urn:nbn:se:su:diva-121884DOI: 10.1186/s12983-015-0113-1ISI: 000361097600001PubMedID: 26366187OAI: diva2:862535
Available from: 2015-10-22 Created: 2015-10-19 Last updated: 2015-10-22Bibliographically approved

Open Access in DiVA

No full text

Other links

Publisher's full textPubMed

Search in DiVA

By author/editor
Lehmann, Philipp
By organisation
Department of Zoology
In the same journal
Frontiers in Zoology

Search outside of DiVA

GoogleGoogle Scholar
The number of downloads is the sum of all downloads of full texts. It may include eg previous versions that are now no longer available

Altmetric score

Total: 39 hits
ReferencesLink to record
Permanent link

Direct link