Drosophilids with darker cuticle have higher body temperature under light.

Autor: Freoa L; Laboratoire de Biologie du Développement, UMR 7622, CNRS, Institut de Biologie Paris-Seine (IBPS), Sorbonne Université, 9 Quai St-Bernard, 75005, Paris, France.; CNRS, MAP5, Université Paris Cité, 45 Rue des Saints-Pères, 75006, Paris, France., Chevin LM; CEFE, CNRS, EPHE, IRD, Univ Montpellier, Univ Paul Valéry Montpellier 3, 34000, Montpellier, France., Christol P; UMR5214, CNRS, Institut d'électronique et des systèmes, Université de Montpellier, 34000, Montpellier, France., Méléard S; CMAP, CNRS, Ecole Polytechnique, France et Institut Universitaire de France, Institut Polytechnique de Paris, 91120, Palaiseau, France., Rera M; Inserm UMR U1284, Centre de Recherche Interdisciplinaire (CRI Paris), 8 bis Rue Charles V, 75004, Paris, France., Véber A; CNRS, MAP5, Université Paris Cité, 45 Rue des Saints-Pères, 75006, Paris, France., Gibert JM; Laboratoire de Biologie du Développement, UMR 7622, CNRS, Institut de Biologie Paris-Seine (IBPS), Sorbonne Université, 9 Quai St-Bernard, 75005, Paris, France. jean-michel.gibert@sorbonne-universite.fr.
Jazyk: angličtina
Zdroj: Scientific reports [Sci Rep] 2023 Mar 02; Vol. 13 (1), pp. 3513. Date of Electronic Publication: 2023 Mar 02.
DOI: 10.1038/s41598-023-30652-6
Abstrakt: Cuticle pigmentation was shown to be associated with body temperature for several relatively large species of insects, but it was questioned for small insects. Here we used a thermal camera to assess the association between drosophilid cuticle pigmentation and body temperature increase when individuals are exposed to light. We compared mutants of large effects within species (Drosophila melanogaster ebony and yellow mutants). Then we analyzed the impact of naturally occurring pigmentation variation within species complexes (Drosophila americana/Drosophila novamexicana and Drosophila yakuba/Drosophila santomea). Finally we analyzed lines of D. melanogaster with moderate differences in pigmentation. We found significant differences in temperatures for each of the four pairs we analyzed. The temperature differences appeared to be proportional to the differently pigmented area: between Drosophila melanogaster ebony and yellow mutants or between Drosophila americana and Drosophila novamexicana, for which the whole body is differently pigmented, the temperature difference was around 0.6 °C ± 0.2 °C. By contrast, between D. yakuba and D. santomea or between Drosophila melanogaster Dark and Pale lines, for which only the posterior abdomen is differentially pigmented, we detected a temperature difference of about 0.14 °C ± 0.10 °C. This strongly suggests that cuticle pigmentation has ecological implications in drosophilids regarding adaptation to environmental temperature.
(© 2023. The Author(s).)
Databáze: MEDLINE
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