Data/hora: 11/06/2024 02:53:13

Provedor de dados: | Institutional Archive of Ifreme (ArchiMer)
País: | France
Título: | Variation in the link between oxygen consumption and ATP production, and its relevance for animal performance
Autores: | Salin, Karine; Auer, Sonya K.; Rey, Benjamin; Selman, Colin; Metcalfe, Neil B.
Data: | 2015-08
Ano: | 2015
Palavras-chave: | Mitochondrial coupling efficiency; Life history; Oxidative stress; Reactive oxygen species; Trade-off; Uncoupling.
Resumo: | It is often assumed that an animal's metabolic rate can be estimated through measuring the whole-organism oxygen consumption rate. However, oxygen consumption alone is unlikely to be a sufficient marker of energy metabolism in many situations. This is due to the inherent variability in the link between oxidation and phosphorylation; that is, the amount of adenosine triphosphate (ATP) generated per molecule of oxygen consumed by mitochondria (P/O ratio). In this article, we describe how the P/O ratio can vary within and among individuals, and in response to a number of environmental parameters, including diet and temperature. As the P/O ratio affects the efficiency of cellular energy production, its variability may have significant consequences for animal performance, such as growth rate and reproductive output. We explore the adaptive significance of such variability and hypothesize that while a reduction in the P/O ratio is energetically costly, it may be associated with advantages in terms of somatic maintenance through reduced production of reactive oxygen species. Finally, we discuss how considering variation in mitochondrial efficiency, together with whole-organism oxygen consumption, can permit a better understanding of the relationship between energy metabolism and life history for studies in evolutionary ecology.
Tipo: | Text
Idioma: | Inglês

Identificador:

https://archimer.ifremer.fr/doc/00414/52509/53322.pdf

DOI:10.1098/rspb.2015.1028

https://archimer.ifremer.fr/doc/00414/52509/

Editor: | Royal Soc
Formato: | application/pdf
Fonte: | Proceedings Of The Royal Society B-biological Sciences (0962-8452) (Royal Soc), 2015-08 , Vol. 282 , N. 1812 , P. 14-22

Fonte:

2015 The Authors. Published by the Royal Society under the terms of the Creative Commons Attribution License http://creativecommons.org/licenses/by/4.0/, which permits unrestricted use, provided the original author and source are credited.

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