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Effects of thermal acclimation on the proteome of the planarian Crenobia alpina from an alpine freshwater spring

ABSTRACT: Is is a fundamental evolutionary question which coordinated molecular changes underly adaptation generally and thermal adaptation specifically. Here we profiled the proteome of the Planarian glacial relict species Crenobia alpina. We sampled individuals from an alpine spring, acclimated groups of individuals at 8, 11, 14 and 17 °C for one week and determined their proteome. These results give insight into the molecular mechanisms underlying thermal adaptation and acclimation to cold and warm temperatures.

INSTRUMENT(S): Orbitrap Fusion Lumos

ORGANISM(S): Crenobia Alpina

TISSUE(S): Whole Body

SUBMITTER: Joshua Ebner

LAB HEAD: Joshua Niklas Ebner

PROVIDER: PXD024592 | Pride | 2022-07-28

REPOSITORIES: Pride

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Project description:As a result of increasing thermal fluctuations and mean temperature values, organisms will experience conditions beyond their physiological limits. In situ adaptation to thermal regimes is mediated via directional selection and phenotypic plasticity. The latter involves physiological and morphological adjustments realized by underlying molecular mechanisms. Understanding species' adaptive capacities requires investigating these adjustive processes. Yet, acclimation through phenotypic plasticity remains largely unexplored, especially at the molecular level; For example, whether cold-adapted species inhabiting freshwater spring ecosystems have evolved adaptive mechanisms to cope with warming of freshwater habitats has, to our knowledge, never been investigated. This work reports a comprehensive proteomics study of the stenotopic species Crunoecia irrorata (Curtis, 1834) (Trichoptera: Lepistomatidae) acclimated to 10, 15 and 20 °C for 168 h. A liquid chromatography tandem mass spectrometry (LC-MS/MS)-based shotgun proteomics approach identified molecular mechanisms underlying acclimation. We constructed a homology-based database by combining genomic and transcriptomic data from related species and quantified 1356 proteins, of which 186 were differentially expressed between temperature treatments. Through functional annotation, we identified candidate proteins facilitating, among others, trehalose accumulation, tracheal system alteration, and heat shock protein regulation, then discuss concomitant ecophysiological implications. These results provide new insights into the mechanisms of adaptive responses to warming of species inhabiting freshwater ecosystems sensitive to climate change. Further, identified candidate proteins will aid in developing targeted experiments to understand their compensatory physiology. To our knowledge, this is the first study utilizing this approach to investigate the nature of phenotypic plasticity of aquatic macroinvertebrates.

			Action	DRS
	001_Calp-LFQ_D20.raw	Raw
	002_Calp-LFQ_D20.raw	Raw
	003_Calp-LFQ_D20.raw	Raw
	004_Calp-LFQ_D20.raw	Raw
	005_Calp-LFQ_D20.raw	Raw

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Effects of thermal acclimation on the proteome of the planarian Crenobia alpina from an alpine freshwater spring

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