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Net superoxide levels: steeper increase with activity in cooler female and hotter male lizards


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dc.contributorCissy Ballen; mjb0100@auburn.eduen_US
dc.creatorBallen, Cissy J.
dc.creatorHealey, Mo
dc.creatorWilson, Mark
dc.creatorTobler, Michael
dc.creatorWapstra, Erik
dc.creatorOlsson, Mats
dc.date.accessioned2023-09-20T14:43:10Z
dc.date.available2023-09-20T14:43:10Z
dc.date.created2012-03
dc.identifier10.1242/jeb.062257en_US
dc.identifier.urihttps://jeb.biologists.org/content/215/5/731en_US
dc.identifier.urihttps://aurora.auburn.edu/handle/11200/50542
dc.identifier.urihttp://dx.doi.org/10.35099/aurora-610
dc.description.abstractEctotherms increase their body temperature in response to ambient heat, thereby elevating their metabolic rate. An often inferred consequence of this is an overall upregulation of gene expression and energetic expenditure, and a concomitant increased production of reactive oxygen species (e. g. superoxide) and, perhaps, a shortened lifespan. However, recent work shows that this may be a superficial interpretation. For example, sometimes a reduced temperature may in fact trigger up-regulation of gene expression. We studied temperature and associated activity effects in male and female Australian painted dragon lizards (Ctenophorus pictus) by allowing the lizards to bask for 4 h versus 12 h, and scoring their associated activity (inactive versus active basking and foraging). As predicted, long-basking lizards (hereafter 'hot') showed heightened activity in both sexes, with a more pronounced effect in females. We then tested for sex-specific effects of basking treatment and activity levels on the increase in net levels of superoxide. In males, short-baskers (hereafter 'cold') had significantly more rapidly decreasing levels of superoxide per unit increasing activity than hot males. In females, however, superoxide levels increased faster with increasing activity in the cold than in the hot basking treatment, and females earlier in the ovarian cycle had lower superoxide levels than females closer to ovulation. In short, males and females differ in how their levels of reactive oxygen species change with temperature-triggered activity.en_US
dc.formatPDFen_US
dc.publisherCOMPANY OF BIOLOGISTS LTD; Australian Research Councilen_US
dc.relation.ispartofJOURNAL OF EXPERIMENTAL BIOLOGYen_US
dc.relation.ispartofseries0022-0949en_US
dc.rights© 2012. This manuscript version is made available under the CC-BY-NC-ND 4.0 license http://creativecommons.org/licenses/by-nc-nd/4.0. Item should be cited as: Ballen, C., Healey, M., Wilson, M., Tobler, M., Wapstra, E. and Olsson, M., 2012. Net superoxide levels: steeper increase with activity in cooler female and hotter male lizards. Journal of Experimental Biology, 215(5), pp.731-735.en_US
dc.subjectreactive oxygen speciesen_US
dc.subjectthermoregulationen_US
dc.subjectlizarden_US
dc.subjectOXIDATIVE STRESSen_US
dc.subjectTEMPERATUREen_US
dc.subjectGENERATIONen_US
dc.subjectEVOLUTIONen_US
dc.titleNet superoxide levels: steeper increase with activity in cooler female and hotter male lizardsen_US
dc.typeTexten_US
dc.type.genreJournal Article, Academic Journalen_US
dc.citation.volume215en_US
dc.citation.issue5en_US
dc.citation.spage731en_US
dc.citation.epage735en_US
dc.description.statusPublisheden_US
dc.description.peerreviewYesen_US

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