The effect of ocean acidification on symbiont photorespiration and productivity in Acropora formosa
Abstract Ocean acidification is expected to lower the net accretion of coral reefs yet little is known about its effect on coral photophysiology. This study investigated the effect of increasing CO 2 on photosynthetic capacity and photoprotection in Acropora formosa . The photoprotective role of pho...
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crwiley:10.1111/j.1365-2486.2009.01943.x 2024-06-09T07:48:46+00:00 The effect of ocean acidification on symbiont photorespiration and productivity in Acropora formosa CRAWLEY, ALICIA KLINE, DAVID I. DUNN, SIMON ANTHONY, KEN DOVE, SOPHIE 2010 http://dx.doi.org/10.1111/j.1365-2486.2009.01943.x https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1111%2Fj.1365-2486.2009.01943.x https://onlinelibrary.wiley.com/doi/pdf/10.1111/j.1365-2486.2009.01943.x en eng Wiley http://onlinelibrary.wiley.com/termsAndConditions#vor Global Change Biology volume 16, issue 2, page 851-863 ISSN 1354-1013 1365-2486 journal-article 2010 crwiley https://doi.org/10.1111/j.1365-2486.2009.01943.x 2024-05-16T14:25:59Z Abstract Ocean acidification is expected to lower the net accretion of coral reefs yet little is known about its effect on coral photophysiology. This study investigated the effect of increasing CO 2 on photosynthetic capacity and photoprotection in Acropora formosa . The photoprotective role of photorespiration within dinoflagellates (genus Symbiodinium ) has largely been overlooked due to focus on the presence of a carbon‐concentrating mechanism despite the evolutionary persistence of a Form II Rubisco. The photorespiratory fixation of oxygen produces phosphoglycolate that would otherwise inhibit carbon fixation though the Calvin cycle if it were not converted to glycolate by phosphoglycolate phosphatase (PGPase). Glycolate is then either excreted or dealt with by enzymes in the photorespiratory glycolate and/or glycerate pathways adding to the pool of carbon fixed in photosynthesis. We found that CO 2 enrichment led to enhanced photoacclimation (increased chlorophyll a per cell) to the subsaturating light levels. Light‐enhanced dark respiration per cell and xanthophyll de‐epoxidation increased, with resultant decreases in photosynthetic capacity ( P nmax ) per chlorophyll. The conservative CO 2 emission scenario (A1B; 600–790 ppm) led to a 38% increase in the P nmax per cell whereas the ‘business‐as‐usual’ scenario (A1F1; 1160–1500 ppm) led to a 45% reduction in PGPase expression and no change in P nmax per cell. These findings support an important functional role for PGPase in dinoflagellates that is potentially compromised under CO 2 enrichment. Article in Journal/Newspaper Ocean acidification Wiley Online Library Calvin ENVELOPE(165.100,165.100,-71.283,-71.283) Global Change Biology 16 2 851 863 |
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Wiley Online Library |
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English |
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Abstract Ocean acidification is expected to lower the net accretion of coral reefs yet little is known about its effect on coral photophysiology. This study investigated the effect of increasing CO 2 on photosynthetic capacity and photoprotection in Acropora formosa . The photoprotective role of photorespiration within dinoflagellates (genus Symbiodinium ) has largely been overlooked due to focus on the presence of a carbon‐concentrating mechanism despite the evolutionary persistence of a Form II Rubisco. The photorespiratory fixation of oxygen produces phosphoglycolate that would otherwise inhibit carbon fixation though the Calvin cycle if it were not converted to glycolate by phosphoglycolate phosphatase (PGPase). Glycolate is then either excreted or dealt with by enzymes in the photorespiratory glycolate and/or glycerate pathways adding to the pool of carbon fixed in photosynthesis. We found that CO 2 enrichment led to enhanced photoacclimation (increased chlorophyll a per cell) to the subsaturating light levels. Light‐enhanced dark respiration per cell and xanthophyll de‐epoxidation increased, with resultant decreases in photosynthetic capacity ( P nmax ) per chlorophyll. The conservative CO 2 emission scenario (A1B; 600–790 ppm) led to a 38% increase in the P nmax per cell whereas the ‘business‐as‐usual’ scenario (A1F1; 1160–1500 ppm) led to a 45% reduction in PGPase expression and no change in P nmax per cell. These findings support an important functional role for PGPase in dinoflagellates that is potentially compromised under CO 2 enrichment. |
format |
Article in Journal/Newspaper |
author |
CRAWLEY, ALICIA KLINE, DAVID I. DUNN, SIMON ANTHONY, KEN DOVE, SOPHIE |
spellingShingle |
CRAWLEY, ALICIA KLINE, DAVID I. DUNN, SIMON ANTHONY, KEN DOVE, SOPHIE The effect of ocean acidification on symbiont photorespiration and productivity in Acropora formosa |
author_facet |
CRAWLEY, ALICIA KLINE, DAVID I. DUNN, SIMON ANTHONY, KEN DOVE, SOPHIE |
author_sort |
CRAWLEY, ALICIA |
title |
The effect of ocean acidification on symbiont photorespiration and productivity in Acropora formosa |
title_short |
The effect of ocean acidification on symbiont photorespiration and productivity in Acropora formosa |
title_full |
The effect of ocean acidification on symbiont photorespiration and productivity in Acropora formosa |
title_fullStr |
The effect of ocean acidification on symbiont photorespiration and productivity in Acropora formosa |
title_full_unstemmed |
The effect of ocean acidification on symbiont photorespiration and productivity in Acropora formosa |
title_sort |
effect of ocean acidification on symbiont photorespiration and productivity in acropora formosa |
publisher |
Wiley |
publishDate |
2010 |
url |
http://dx.doi.org/10.1111/j.1365-2486.2009.01943.x https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1111%2Fj.1365-2486.2009.01943.x https://onlinelibrary.wiley.com/doi/pdf/10.1111/j.1365-2486.2009.01943.x |
long_lat |
ENVELOPE(165.100,165.100,-71.283,-71.283) |
geographic |
Calvin |
geographic_facet |
Calvin |
genre |
Ocean acidification |
genre_facet |
Ocean acidification |
op_source |
Global Change Biology volume 16, issue 2, page 851-863 ISSN 1354-1013 1365-2486 |
op_rights |
http://onlinelibrary.wiley.com/termsAndConditions#vor |
op_doi |
https://doi.org/10.1111/j.1365-2486.2009.01943.x |
container_title |
Global Change Biology |
container_volume |
16 |
container_issue |
2 |
container_start_page |
851 |
op_container_end_page |
863 |
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1801380654493990912 |