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Coral Thermal Tolerance: Tuning Gene Expression to Resist Thermal Stress

The acclimatization capacity of corals is a critical consideration in the persistence of coral reefs under stresses imposed by global climate change. The stress history of corals plays a role in subsequent response to heat stress, but the transcriptomic changes associated with these plastic changes...

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Autores principales: Bellantuono, Anthony J., Granados-Cifuentes, Camila, Miller, David J., Hoegh-Guldberg, Ove, Rodriguez-Lanetty, Mauricio
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Public Library of Science 2012
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3511300/
https://www.ncbi.nlm.nih.gov/pubmed/23226355
http://dx.doi.org/10.1371/journal.pone.0050685
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author Bellantuono, Anthony J.
Granados-Cifuentes, Camila
Miller, David J.
Hoegh-Guldberg, Ove
Rodriguez-Lanetty, Mauricio
author_facet Bellantuono, Anthony J.
Granados-Cifuentes, Camila
Miller, David J.
Hoegh-Guldberg, Ove
Rodriguez-Lanetty, Mauricio
author_sort Bellantuono, Anthony J.
collection PubMed
description The acclimatization capacity of corals is a critical consideration in the persistence of coral reefs under stresses imposed by global climate change. The stress history of corals plays a role in subsequent response to heat stress, but the transcriptomic changes associated with these plastic changes have not been previously explored. In order to identify host transcriptomic changes associated with acquired thermal tolerance in the scleractinian coral Acropora millepora, corals preconditioned to a sub-lethal temperature of 3°C below bleaching threshold temperature were compared to both non-preconditioned corals and untreated controls using a cDNA microarray platform. After eight days of hyperthermal challenge, conditions under which non-preconditioned corals bleached and preconditioned corals (thermal-tolerant) maintained Symbiodinium density, a clear differentiation in the transcriptional profiles was revealed among the condition examined. Among these changes, nine differentially expressed genes separated preconditioned corals from non-preconditioned corals, with 42 genes differentially expressed between control and preconditioned treatments, and 70 genes between non-preconditioned corals and controls. Differentially expressed genes included components of an apoptotic signaling cascade, which suggest the inhibition of apoptosis in preconditioned corals. Additionally, lectins and genes involved in response to oxidative stress were also detected. One dominant pattern was the apparent tuning of gene expression observed between preconditioned and non-preconditioned treatments; that is, differences in expression magnitude were more apparent than differences in the identity of genes differentially expressed. Our work revealed a transcriptomic signature underlying the tolerance associated with coral thermal history, and suggests that understanding the molecular mechanisms behind physiological acclimatization would be critical for the modeling of reefs in impending climate change scenarios.
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spelling pubmed-35113002012-12-05 Coral Thermal Tolerance: Tuning Gene Expression to Resist Thermal Stress Bellantuono, Anthony J. Granados-Cifuentes, Camila Miller, David J. Hoegh-Guldberg, Ove Rodriguez-Lanetty, Mauricio PLoS One Research Article The acclimatization capacity of corals is a critical consideration in the persistence of coral reefs under stresses imposed by global climate change. The stress history of corals plays a role in subsequent response to heat stress, but the transcriptomic changes associated with these plastic changes have not been previously explored. In order to identify host transcriptomic changes associated with acquired thermal tolerance in the scleractinian coral Acropora millepora, corals preconditioned to a sub-lethal temperature of 3°C below bleaching threshold temperature were compared to both non-preconditioned corals and untreated controls using a cDNA microarray platform. After eight days of hyperthermal challenge, conditions under which non-preconditioned corals bleached and preconditioned corals (thermal-tolerant) maintained Symbiodinium density, a clear differentiation in the transcriptional profiles was revealed among the condition examined. Among these changes, nine differentially expressed genes separated preconditioned corals from non-preconditioned corals, with 42 genes differentially expressed between control and preconditioned treatments, and 70 genes between non-preconditioned corals and controls. Differentially expressed genes included components of an apoptotic signaling cascade, which suggest the inhibition of apoptosis in preconditioned corals. Additionally, lectins and genes involved in response to oxidative stress were also detected. One dominant pattern was the apparent tuning of gene expression observed between preconditioned and non-preconditioned treatments; that is, differences in expression magnitude were more apparent than differences in the identity of genes differentially expressed. Our work revealed a transcriptomic signature underlying the tolerance associated with coral thermal history, and suggests that understanding the molecular mechanisms behind physiological acclimatization would be critical for the modeling of reefs in impending climate change scenarios. Public Library of Science 2012-11-30 /pmc/articles/PMC3511300/ /pubmed/23226355 http://dx.doi.org/10.1371/journal.pone.0050685 Text en © 2012 Bellantuono et al http://creativecommons.org/licenses/by/4.0/ This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are properly credited.
spellingShingle Research Article
Bellantuono, Anthony J.
Granados-Cifuentes, Camila
Miller, David J.
Hoegh-Guldberg, Ove
Rodriguez-Lanetty, Mauricio
Coral Thermal Tolerance: Tuning Gene Expression to Resist Thermal Stress
title Coral Thermal Tolerance: Tuning Gene Expression to Resist Thermal Stress
title_full Coral Thermal Tolerance: Tuning Gene Expression to Resist Thermal Stress
title_fullStr Coral Thermal Tolerance: Tuning Gene Expression to Resist Thermal Stress
title_full_unstemmed Coral Thermal Tolerance: Tuning Gene Expression to Resist Thermal Stress
title_short Coral Thermal Tolerance: Tuning Gene Expression to Resist Thermal Stress
title_sort coral thermal tolerance: tuning gene expression to resist thermal stress
topic Research Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3511300/
https://www.ncbi.nlm.nih.gov/pubmed/23226355
http://dx.doi.org/10.1371/journal.pone.0050685
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