Details

Autor(en) / Beteiligte

• Keaveny, Ellen C.
• Helling, Mitchell R.
• Basile, Franco
• Strange, James P.
• Lozier, Jeffrey D.
• Dillon, Michael E.

Titel

Metabolomes of bumble bees reared in common garden conditions suggest constitutive differences in energy and toxin metabolism across populations

Ist Teil von

• Journal of insect physiology, 2023-12, Vol.151, p.104581-104581, Article 104581

Ort / Verlag

England: Elsevier Ltd

Erscheinungsjahr

2023

Quelle

Alma/SFX Local Collection

Beschreibungen/Notizen

• [Display omitted] •LC-MS/MS revealed constitutive differences in metabolite abundance across bumble bee populations and body segments (head, thorax, and abdomen).•Metabolites related to carbohydrate metabolism were more abundant in bees reared from queens collected from more cold-tolerant populations, despite being reared in common garden conditions.•Exogenous metabolites, including toxins, also differed between bees reared from queens collected from different populations despite being fed the same diet, suggesting differences in feeding and/or nutrient and toxin metabolism. Cold tolerance of ectotherms can vary strikingly among species and populations. Variation in cold tolerance can reflect differences in genomes and transcriptomes that confer cellular-level protection from cold; additionally, shifts in protein function and abundance can be altered by other cellular constituents as cold-exposed insects often have shifts in their metabolomes. Even without a cold challenge, insects from different populations may vary in cellular composition that could alter cold tolerance, but investigations of constitutive differences in metabolomes across wild populations remain rare. To address this gap, we reared Bombus vosnesenskii queens collected from Oregon and California (USA) that differ in cold tolerance (CTmin = -6 °C and 0 °C, respectively) in common garden conditions, and measured offspring metabolomes using untargeted LC-MS/MS. Oregon bees had higher levels of metabolites associated with carbohydrate (sorbitol, lactitol, maltitol, and sorbitol-6-phosphate) and amino acid (hydroxyproline, ornithine, and histamine) metabolism. Exogenous metabolites, likely derived from the diet, also varied between Oregon and California bees, suggesting population-level differences in toxin metabolism. Overall, our results reveal constitutive differences in metabolomes for bumble bees reared in common garden conditions from queens collected in different locations despite no previous cold exposure.