Opposing effects of oxidative challenge and carotenoids on antioxidant status and condition-dependent sexual signalling

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68081766%3A_____%2F16%3A00458721" target="_blank" >RIV/68081766:_____/16:00458721 - isvavai.cz</a>

Alternative codes found

RIV/61389030:_____/16:00458721 RIV/00216208:11310/16:10323268 RIV/60460709:41210/16:72305 RIV/60460709:41330/16:70227

Result on the web

<a href="http://dx.doi.org/10.1038/srep23546" target="_blank" >http://dx.doi.org/10.1038/srep23546</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1038/srep23546" target="_blank" >10.1038/srep23546</a>

Result language

angličtina

Original language name

Opposing effects of oxidative challenge and carotenoids on antioxidant status and condition-dependent sexual signalling

Original language description

Several recent hypotheses consider oxidative stress to be a primary constraint ensuring honesty of condition-dependent carotenoid-based signalling. The key testable difference between these hypotheses is the assumed importance of carotenoids for redox homeostasis, with carotenoids being either antioxidant, pro-oxidant or unimportant. We tested the role of carotenoids in redox balance and sexual signalling by exposing adult male zebra finches (Taeniopygia guttata) to oxidative challenge (diquat dibromide) and manipulating carotenoid intake. As the current controversy over the importance of carotenoids as antioxidants could stem from the hydrophilic basis of commonly-used antioxidant assays, we used the novel measure of in vivo lipophilic antioxidant capacity. Oxidative challenge reduced beak pigmentation but elicited an increase in antioxidant capacity suggesting resource reallocation from signalling to redox homeostasis. Carotenoids counteracted the effect of oxidative challenge on lipophilic (but not hydrophilic) antioxidant capacity, thereby supporting carotenoid antioxidant function in vivo. This is inconsistent with hypotheses proposing that signalling honesty is maintained through either ROS-induced carotenoid degradation or the pro-oxidant effect of high levels of carotenoid-cleavage products acting as a physiological handicap. Our data further suggest that assessment of lipophilic antioxidant capacity is necessary to fully understand the role of redox processes in ecology and evolution.

Czech name

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Czech description

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Type

J_x - Unclassified - Peer-reviewed scientific article (Jimp, Jsc and Jost)

CEP classification

EG - Zoology

OECD FORD branch

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Project

Result was created during the realization of more than one project. More information in the Projects tab.

Continuities

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year

2016

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Name of the periodical

Scientific Reports

ISSN

2045-2322

e-ISSN

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Volume of the periodical

6

Issue of the periodical within the volume

23546

Country of publishing house

GB - UNITED KINGDOM

Number of pages

9

Pages from-to

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UT code for WoS article

000372576400001

EID of the result in the Scopus database

2-s2.0-84961572853