Future CO 2 -induced seawater acidification mediates the physiological performance of a green alga Ulva linza in different photoperiods
Photoperiods have an important impact on macroalgae living in the intertidal zone. Ocean acidification also influences the physiology of macroalgae. However, little is known about the interaction between ocean acidification and photoperiod on macroalgae. In this study, a green alga Ulva linza was cu...
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crpeerj:10.7717/peerj.7048 2024-06-23T07:55:49+00:00 Future CO 2 -induced seawater acidification mediates the physiological performance of a green alga Ulva linza in different photoperiods Yue, Furong Gao, Guang Ma, Jing Wu, Hailong Li, Xinshu Xu, Juntian Natural Science Foundation of Jiangsu Province Six Talents Peaks in Jiangsu Province “333” project of Jiangsu Province and Priority Academic Program Development of Jiangsu Higher Education Institutions 2019 http://dx.doi.org/10.7717/peerj.7048 https://peerj.com/articles/7048.pdf https://peerj.com/articles/7048.xml https://peerj.com/articles/7048.html en eng PeerJ http://creativecommons.org/licenses/by/4.0/ PeerJ volume 7, page e7048 ISSN 2167-8359 journal-article 2019 crpeerj https://doi.org/10.7717/peerj.7048 2024-06-04T06:21:57Z Photoperiods have an important impact on macroalgae living in the intertidal zone. Ocean acidification also influences the physiology of macroalgae. However, little is known about the interaction between ocean acidification and photoperiod on macroalgae. In this study, a green alga Ulva linza was cultured under three different photoperiods (L: D = 8:16, 12:12, 16:8) and two different CO 2 levels (LC, 400 ppm; HC, 1,000 ppm) to investigate their responses. The results showed that relative growth rate of U. linza increased with extended light periods under LC but decreased at HC when exposed to the longest light period of 16 h compared to 12 h. Higher CO 2 levels enhanced the relative growth rate at a L: D of 8:16, had no effect at 12:12 but reduced RGR at 16:8. At LC, the L: D of 16:8 significantly stimulated maximum quantum yield (Yield). Higher CO 2 levels enhanced Yield at L: D of 12:12 and 8:16, had negative effect at 16:8. Non-photochemical quenching (NPQ) increased with increasing light period. High CO 2 levels did not affect respiration rate during shorter light periods but enhanced it at a light period of 16 h. Longer light periods had negative effects on Chl a and Chl b content, and high CO 2 level also inhibited the synthesis of these pigments. Our data demonstrate the interactive effects of CO 2 and photoperiod on the physiological characteristics of the green tide macroalga Ulva linza and indicate that future ocean acidification may hinder the stimulatory effect of long light periods on growth of Ulva species. Article in Journal/Newspaper Ocean acidification PeerJ Publishing PeerJ 7 e7048 |
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English |
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Photoperiods have an important impact on macroalgae living in the intertidal zone. Ocean acidification also influences the physiology of macroalgae. However, little is known about the interaction between ocean acidification and photoperiod on macroalgae. In this study, a green alga Ulva linza was cultured under three different photoperiods (L: D = 8:16, 12:12, 16:8) and two different CO 2 levels (LC, 400 ppm; HC, 1,000 ppm) to investigate their responses. The results showed that relative growth rate of U. linza increased with extended light periods under LC but decreased at HC when exposed to the longest light period of 16 h compared to 12 h. Higher CO 2 levels enhanced the relative growth rate at a L: D of 8:16, had no effect at 12:12 but reduced RGR at 16:8. At LC, the L: D of 16:8 significantly stimulated maximum quantum yield (Yield). Higher CO 2 levels enhanced Yield at L: D of 12:12 and 8:16, had negative effect at 16:8. Non-photochemical quenching (NPQ) increased with increasing light period. High CO 2 levels did not affect respiration rate during shorter light periods but enhanced it at a light period of 16 h. Longer light periods had negative effects on Chl a and Chl b content, and high CO 2 level also inhibited the synthesis of these pigments. Our data demonstrate the interactive effects of CO 2 and photoperiod on the physiological characteristics of the green tide macroalga Ulva linza and indicate that future ocean acidification may hinder the stimulatory effect of long light periods on growth of Ulva species. |
author2 |
Natural Science Foundation of Jiangsu Province Six Talents Peaks in Jiangsu Province “333” project of Jiangsu Province and Priority Academic Program Development of Jiangsu Higher Education Institutions |
format |
Article in Journal/Newspaper |
author |
Yue, Furong Gao, Guang Ma, Jing Wu, Hailong Li, Xinshu Xu, Juntian |
spellingShingle |
Yue, Furong Gao, Guang Ma, Jing Wu, Hailong Li, Xinshu Xu, Juntian Future CO 2 -induced seawater acidification mediates the physiological performance of a green alga Ulva linza in different photoperiods |
author_facet |
Yue, Furong Gao, Guang Ma, Jing Wu, Hailong Li, Xinshu Xu, Juntian |
author_sort |
Yue, Furong |
title |
Future CO 2 -induced seawater acidification mediates the physiological performance of a green alga Ulva linza in different photoperiods |
title_short |
Future CO 2 -induced seawater acidification mediates the physiological performance of a green alga Ulva linza in different photoperiods |
title_full |
Future CO 2 -induced seawater acidification mediates the physiological performance of a green alga Ulva linza in different photoperiods |
title_fullStr |
Future CO 2 -induced seawater acidification mediates the physiological performance of a green alga Ulva linza in different photoperiods |
title_full_unstemmed |
Future CO 2 -induced seawater acidification mediates the physiological performance of a green alga Ulva linza in different photoperiods |
title_sort |
future co 2 -induced seawater acidification mediates the physiological performance of a green alga ulva linza in different photoperiods |
publisher |
PeerJ |
publishDate |
2019 |
url |
http://dx.doi.org/10.7717/peerj.7048 https://peerj.com/articles/7048.pdf https://peerj.com/articles/7048.xml https://peerj.com/articles/7048.html |
genre |
Ocean acidification |
genre_facet |
Ocean acidification |
op_source |
PeerJ volume 7, page e7048 ISSN 2167-8359 |
op_rights |
http://creativecommons.org/licenses/by/4.0/ |
op_doi |
https://doi.org/10.7717/peerj.7048 |
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PeerJ |
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7 |
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e7048 |
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1802648533190311936 |