Details

Autor(en) / Beteiligte

• Rivera-Rincón, N.
• Altindag, U.H.
• Amin, R.
• Graze, R.M.
• Appel, A.G.
• Stevison, L.S.

Titel

A comparison of thermal stress response between Drosophila melanogaster and Drosophila pseudoobscura reveals differences between species and sexes

Ist Teil von

• Journal of insect physiology, 2024-03, Vol.153, p.104616-104616, Article 104616

Ort / Verlag

England: Elsevier Ltd

Erscheinungsjahr

2024

Quelle

Alma/SFX Local Collection

Beschreibungen/Notizen

• [Display omitted] •Temperature stressors associated with climate change have different impacts on species, and sexes of the same species•The impacts of higher temperatures vary depending on the developmental stage at which the stressor is applied•D. melanogaster females exhibit higher differences in thermal tolerances, with a possible trade-off with fecundity•Oogenesis is almost twice as fast due to high temperatures•The impact of high temperature is most pronounced when its exposure is during egg and pupal development•Thermal tolerance and other stress response mechanisms seem to be associated with multiple aspects of life history The environment is changing faster than anticipated due to climate change, making species more vulnerable to its impacts. The level of vulnerability of species is influenced by factors such as the degree and duration of exposure, as well as the physiological sensitivity of organisms to changes in their environments, which has been shown to vary among species, populations, and individuals. Here, we compared physiological changes in fecundity, critical thermalmaximum (CTmax), respiratory quotient (RQ), and DNA damage in ovaries in response to temperature stress in two species of fruit fly, Drosophila melanogaster (25 vs. 29.5 °C) and Drosophila pseudoobscura (20.5 vs. 25 °C). The fecundity of D. melanogaster was more affected by high temperatures when exposed during egg through adult development, while D. pseudoobscura was most significantly affected when exposed to high temperatures exclusively during egg through pupal development. Additionally, D. melanogaster males exhibited a decrease of CTmax under high temperatures, while females showed an increase of CTmax when exposed to high temperatures during egg through adult development. while D. pseudoobscura females and males showed an increased CTmax only when reared at high temperatures during egg through pupae development. Moreover, both species showed an acceleration in oogenesis and an increase in apoptosis due to heat stress. These changes can likely be attributed to key differences in the geographic range, thermal range, development time, and other different factors between these two systems. Through this comparison of variation in physiology and developmental response to thermal stress, we found important differences between species and sexes that suggest future work needs to account for these factors separately in understanding the effects of constant increased temperatures.