Presentation_1_Effects of seawater acidification and solar ultraviolet radiation on photosynthetic performances and biochemical compositions of Rhodosorus sp. SCSIO-45730.pdf
Ocean acidification (OA) caused by rising atmospheric CO 2 concentration and solar ultraviolet radiation (UVR) resulting from ozone depletion may affect marine organisms, but little is known regarding how unicellular Rhodosorus sp. SCSIO-45730, an excellent species resource containing various biolog...
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ftunivfreestate:oai:figshare.com:article/21715601 2023-05-15T17:51:53+02:00 Presentation_1_Effects of seawater acidification and solar ultraviolet radiation on photosynthetic performances and biochemical compositions of Rhodosorus sp. SCSIO-45730.pdf Na Wang (193263) Jinting Lv (14249825) Fangfang Yang (115725) Tao Li (86810) Hualian Wu (14249828) Chulin Li (14249831) Haiwei Pei (14249834) Houbo Wu (14249837) Wenzhou Xiang (14249840) 2022-12-13T04:39:02Z https://doi.org/10.3389/fmars.2022.1092451.s001 unknown https://figshare.com/articles/presentation/Presentation_1_Effects_of_seawater_acidification_and_solar_ultraviolet_radiation_on_photosynthetic_performances_and_biochemical_compositions_of_Rhodosorus_sp_SCSIO-45730_pdf/21715601 doi:10.3389/fmars.2022.1092451.s001 CC BY 4.0 CC-BY Oceanography Marine Biology Marine Geoscience Biological Oceanography Chemical Oceanography Physical Oceanography Marine Engineering rhodosorus seawater acidification ultraviolet radiation photosynthetic performance biochemical composition enzyme activity Text Presentation 2022 ftunivfreestate https://doi.org/10.3389/fmars.2022.1092451.s001 2022-12-16T00:30:36Z Ocean acidification (OA) caused by rising atmospheric CO 2 concentration and solar ultraviolet radiation (UVR) resulting from ozone depletion may affect marine organisms, but little is known regarding how unicellular Rhodosorus sp. SCSIO-45730, an excellent species resource containing various biological-active compounds, responds to OA and UVR. Therefore, we conducted a factorial coupling experiment to unravel the combined effects of OA and UVR on the growth, photosynthetic performances, biochemical compositions and enzyme activities of Rhodosorus sp. SCSIO-45730, which were exposed to two levels of CO 2 (LC, 400 μatm, current CO 2 level; HC, 1000 μatm, future CO 2 level) and three levels of UVR (photosynthetically active radiation (PAR), PAR plus UVA, PAR plus UVB) treatments in all combinations, respectively. Compared to LC treatment, HC stimulated the relative growth rate (RGR) due to higher optimum and effective quantum yields, photosynthetic efficiency, maximum electron transport rates and photosynthetic pigments contents regardless of UVR. However, the presence of UVA had no significant effect but UVB markedly reduced the RGR. Additionally, higher carbohydrate content and lower protein and lipid contents were observed when Rhodosorus sp. SCSIO-45730 was cultured under HC due to the ample HCO3− applications and active stimulation of metabolic enzymes of carbonic anhydrase and nitrate reductase, thus resulting in higher TC/TN. OA also triggered the production of reactive oxygen species (ROS), and the increase of ROS coincided approximately with superoxide dismutase and catalase activities, as well as phenols contents. However, UVR induced photochemical inhibition and damaged macromolecules, making algal cells need more energy for self-protection. Generally, these results revealed that OA counteracted UVR-related inhibition on Rhodosorus sp. SCSIO-45730, adding our understanding of the red algae responding to future global climate changes. Conference Object Ocean acidification KovsieScholar Repository (University of the Free State - UFS UV) |
institution |
Open Polar |
collection |
KovsieScholar Repository (University of the Free State - UFS UV) |
op_collection_id |
ftunivfreestate |
language |
unknown |
topic |
Oceanography Marine Biology Marine Geoscience Biological Oceanography Chemical Oceanography Physical Oceanography Marine Engineering rhodosorus seawater acidification ultraviolet radiation photosynthetic performance biochemical composition enzyme activity |
spellingShingle |
Oceanography Marine Biology Marine Geoscience Biological Oceanography Chemical Oceanography Physical Oceanography Marine Engineering rhodosorus seawater acidification ultraviolet radiation photosynthetic performance biochemical composition enzyme activity Na Wang (193263) Jinting Lv (14249825) Fangfang Yang (115725) Tao Li (86810) Hualian Wu (14249828) Chulin Li (14249831) Haiwei Pei (14249834) Houbo Wu (14249837) Wenzhou Xiang (14249840) Presentation_1_Effects of seawater acidification and solar ultraviolet radiation on photosynthetic performances and biochemical compositions of Rhodosorus sp. SCSIO-45730.pdf |
topic_facet |
Oceanography Marine Biology Marine Geoscience Biological Oceanography Chemical Oceanography Physical Oceanography Marine Engineering rhodosorus seawater acidification ultraviolet radiation photosynthetic performance biochemical composition enzyme activity |
description |
Ocean acidification (OA) caused by rising atmospheric CO 2 concentration and solar ultraviolet radiation (UVR) resulting from ozone depletion may affect marine organisms, but little is known regarding how unicellular Rhodosorus sp. SCSIO-45730, an excellent species resource containing various biological-active compounds, responds to OA and UVR. Therefore, we conducted a factorial coupling experiment to unravel the combined effects of OA and UVR on the growth, photosynthetic performances, biochemical compositions and enzyme activities of Rhodosorus sp. SCSIO-45730, which were exposed to two levels of CO 2 (LC, 400 μatm, current CO 2 level; HC, 1000 μatm, future CO 2 level) and three levels of UVR (photosynthetically active radiation (PAR), PAR plus UVA, PAR plus UVB) treatments in all combinations, respectively. Compared to LC treatment, HC stimulated the relative growth rate (RGR) due to higher optimum and effective quantum yields, photosynthetic efficiency, maximum electron transport rates and photosynthetic pigments contents regardless of UVR. However, the presence of UVA had no significant effect but UVB markedly reduced the RGR. Additionally, higher carbohydrate content and lower protein and lipid contents were observed when Rhodosorus sp. SCSIO-45730 was cultured under HC due to the ample HCO3− applications and active stimulation of metabolic enzymes of carbonic anhydrase and nitrate reductase, thus resulting in higher TC/TN. OA also triggered the production of reactive oxygen species (ROS), and the increase of ROS coincided approximately with superoxide dismutase and catalase activities, as well as phenols contents. However, UVR induced photochemical inhibition and damaged macromolecules, making algal cells need more energy for self-protection. Generally, these results revealed that OA counteracted UVR-related inhibition on Rhodosorus sp. SCSIO-45730, adding our understanding of the red algae responding to future global climate changes. |
format |
Conference Object |
author |
Na Wang (193263) Jinting Lv (14249825) Fangfang Yang (115725) Tao Li (86810) Hualian Wu (14249828) Chulin Li (14249831) Haiwei Pei (14249834) Houbo Wu (14249837) Wenzhou Xiang (14249840) |
author_facet |
Na Wang (193263) Jinting Lv (14249825) Fangfang Yang (115725) Tao Li (86810) Hualian Wu (14249828) Chulin Li (14249831) Haiwei Pei (14249834) Houbo Wu (14249837) Wenzhou Xiang (14249840) |
author_sort |
Na Wang (193263) |
title |
Presentation_1_Effects of seawater acidification and solar ultraviolet radiation on photosynthetic performances and biochemical compositions of Rhodosorus sp. SCSIO-45730.pdf |
title_short |
Presentation_1_Effects of seawater acidification and solar ultraviolet radiation on photosynthetic performances and biochemical compositions of Rhodosorus sp. SCSIO-45730.pdf |
title_full |
Presentation_1_Effects of seawater acidification and solar ultraviolet radiation on photosynthetic performances and biochemical compositions of Rhodosorus sp. SCSIO-45730.pdf |
title_fullStr |
Presentation_1_Effects of seawater acidification and solar ultraviolet radiation on photosynthetic performances and biochemical compositions of Rhodosorus sp. SCSIO-45730.pdf |
title_full_unstemmed |
Presentation_1_Effects of seawater acidification and solar ultraviolet radiation on photosynthetic performances and biochemical compositions of Rhodosorus sp. SCSIO-45730.pdf |
title_sort |
presentation_1_effects of seawater acidification and solar ultraviolet radiation on photosynthetic performances and biochemical compositions of rhodosorus sp. scsio-45730.pdf |
publishDate |
2022 |
url |
https://doi.org/10.3389/fmars.2022.1092451.s001 |
genre |
Ocean acidification |
genre_facet |
Ocean acidification |
op_relation |
https://figshare.com/articles/presentation/Presentation_1_Effects_of_seawater_acidification_and_solar_ultraviolet_radiation_on_photosynthetic_performances_and_biochemical_compositions_of_Rhodosorus_sp_SCSIO-45730_pdf/21715601 doi:10.3389/fmars.2022.1092451.s001 |
op_rights |
CC BY 4.0 |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.3389/fmars.2022.1092451.s001 |
_version_ |
1766159179622383616 |