Molecular basis of parental contributions to the behavioural tolerance of elevated pCO(2) in a coral reef fish

Monroe, Alison A., Schunter, Celia, Welch, Megan J., Munday, Philip L., and Ravasi, Timothy (2021) Molecular basis of parental contributions to the behavioural tolerance of elevated pCO(2) in a coral reef fish. Proceedings of the Royal Society of London Series B, Biological Sciences, 288 (1964). 20211931.

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Abstract

Knowledge of adaptive potential is crucial to predicting the impacts of ocean acidification (OA) on marine organisms. In the spiny damselfish, Acanthochromis polyacanthus, individual variation in behavioural tolerance to elevated pCO(2) has been observed and is associated with offspring gene expression patterns in the brain. However, the maternal and paternal contributions of this variation are unknown. To investigate parental influence of behavioural pCO(2) tolerance, we crossed pCO(2)-tolerant fathers with pCO(2)-sensitive mothers and vice versa, reared their offspring at control and elevated pCO(2) levels, and compared the juveniles' brain transcriptional programme. We identified a large influence of parental phenotype on expression patterns of offspring, irrespective of environmental conditions. Circadian rhythm genes, associated with a tolerant parental phenotype, were uniquely expressed in tolerant mother offspring, while tolerant fathers had a greater role in expression of genes associated with histone binding. Expression changes in genes associated with neural plasticity were identified in both offspring types: the maternal line had a greater effect on genes related to neuron growth while paternal influence impacted the expression of synaptic development genes. Our results confirm cellular mechanisms involved in responses to varying lengths of OA exposure, while highlighting the parental phenotype's influence on offspring molecular phenotype.

Item ID: 72376
Item Type: Article (Research - C1)
ISSN: 1471-2954
Keywords: ocean acidification,climate change,parental effects,phenotypic variation,transcriptome,genetic variance
Copyright Information: © 2021 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.
Funders: Australian Research Council (ARC)
Date Deposited: 09 Feb 2022 14:40
FoR Codes: 31 BIOLOGICAL SCIENCES > 3105 Genetics > 310503 Developmental genetics (incl. sex determination) @ 50%
31 BIOLOGICAL SCIENCES > 3104 Evolutionary biology > 310406 Evolutionary impacts of climate change @ 50%
SEO Codes: 18 ENVIRONMENTAL MANAGEMENT > 1802 Coastal and estuarine systems and management > 180203 Coastal or estuarine biodiversity @ 50%
19 ENVIRONMENTAL POLICY, CLIMATE CHANGE AND NATURAL HAZARDS > 1905 Understanding climate change > 190504 Effects of climate change on Australia (excl. social impacts) @ 50%
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