Nitric Oxide Production Rather Than Oxidative Stress And Cell Death Is Associated With The Onset Of Coral Bleaching In Pocillopora Acuta.

Jury, Christopher P.; Boeing, Brian M.; Trapido-Rosenthal, Henry; Gates, Ruth D.; Toonen, Robert J .

doi:10.7717/peerj.13321

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Nitric Oxide Production Rather Than Oxidative Stress And Cell Death Is Associated With The Onset Of Coral Bleaching In Pocillopora Acuta.

2022
By Jury, Christopher P. ; Boeing, Brian M. ; Trapido-Rosenthal, Henry ; ...
Source: PeerJ 10:e13321

[PDF-1.14 MB]

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Journal Title:

PeerJ
Personal Author:

Jury, Christopher P. ; Boeing, Brian M. ; Trapido-Rosenthal, Henry ; Gates, Ruth D. ; Toonen, Robert J .

Jury, Christopher P. ; Boeing, Brian M. ; Trapido-Rosenthal, Henry ; Gates, Ruth D. ; Toonen, Robert J . Less -
NOAA Program & Office:

Sea Grant ; OAR (Oceanic and Atmospheric Research)

Sea Grant ; OAR (Oceanic and Atmospheric Research) Less -
Sea Grant Program:

HAWAU (Hawaii Sea Grant)
Description:

Elevated seawater temperatures associated with climate change lead to coral bleaching. While the ultimate causes of bleaching are well understood, the proximate physiological mechanisms underlying the bleaching response are not as well defined. Here we measured nitric oxide synthase activity, oxidative stress, and cell death in algal symbionts (Symbiodinaceae) freshly isolated from the reef-building coral Pocillopora acuta collected in the field under natural non-bleaching conditions and from corals experimentally exposed to elevated temperatures. Nitric oxide synthase activity in the algal symbionts was >3 orders of magnitude higher than that of the host and increased dramatically with increasing temperature and time of exposure (up to 72 h), consistent with the onset of bleaching for these corals. Oxidative stress and cell death among the algal symbionts were highest in coral holobionts exposed to intermediate as opposed to maximal temperatures, suggesting that these mechanisms are not proximal triggers for bleaching in this species. Our results point to nitric oxide production by the algal symbionts, rather than symbiont dysfunction, as a more important driver of coral bleaching under acute thermal stress in this coral.
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Coral Bleaching Nitric Oxide
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PeerJ 10:e13321
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http://dx.doi.org/10.7717/peerj.13321
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PDF
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Journal Article
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Grant no. NA22OAR4170108
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https://creativecommons.org/licenses/by/4.0/
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CC BY
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This is an open access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, reproduction and adaptation in any medium and for any purpose provided that it is properly attributed. For attribution, the original author(s), title, publication source (PeerJ) and either DOI or URL of the article must be cited.
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urn:sha256:6614343a06299a8ebfa43be75f06e9aea142f813d05407bd02773aecceb07e06
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Nitric Oxide Production Rather Than Oxidative Stress And Cell Death Is Associated With The Onset Of Coral Bleaching In Pocillopora Acuta.

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