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240301s2024 xx |||||o 00| ||eng c |
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|a 10.1016/j.plaphy.2024.108465
|2 doi
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|a pubmed24n1359.xml
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|a eng
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|a Zhang, Yating
|e verfasserin
|4 aut
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|a Increased light intensity enhances photosynthesis and biochemical components of red macroalga of commercial importance, Kappaphycus alvarezii, in response to ocean acidification
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|c 2024
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|a Text
|b txt
|2 rdacontent
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|a ƒaComputermedien
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|2 rdamedia
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|a ƒa Online-Ressource
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|a Date Completed 01.04.2024
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|a Date Revised 01.04.2024
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|a published: Print-Electronic
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|a Citation Status MEDLINE
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|a Copyright © 2024 Elsevier Masson SAS. All rights reserved.
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|a The concentration of atmospheric carbon dioxide (CO2) has increased drastically over the past several decades, resulting in the pH of the ocean decreasing by 0.44 ± 0.005 units, known as ocean acidification (OA). The Kappaphycus alvarezii (Rhodophyta, Solieriaceae), is a commercially and ecologically important red macroalga with significant CO2 absorption potential from seawater. The K. alvarezii also experienced light variations from self-shading and varied cultivation depths. Thus, the aim of present study was to investigate the effects of two pCO2 levels (450 and 1200 ppmv) and three light intensities (50, 100, and 150 μmol photons·m-2·s-1) on photosynthesis and the biochemical components in K. alvarezii. The results of the present study showed that a light intensity of 50 μmol photons·m-2·s-1 was optimal for K. alvarezii photosynthesis with 0.663 ± 0.030 of Fv/Fm and 0.672 ± 0.025 of Fv'/Fm'. Phycoerythrin contents at two pCO2 levels decreased significantly with an increase in light intensity by 57.14-87.76%, while phycocyanin contents only decreased from 0.0069 ± 0.001 mg g-1 FW to 0.0047 ± 0.001 mg g-1 FW with an increase in light intensity at 1200 ppmv of pCO2. Moreover, moderate increases in light intensity and pCO2 had certain positive effects on the physiological performance of K. alvarezii, specifically in terms of increasing soluble carbohydrate production. Although OA and high light levels promoted total organic carbon accumulation (21.730 ± 0.205% DW) in K. alvarezii, they had a negative impact on total nitrogen accumulation (0.600 ± 0.017% DW)
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|a Journal Article
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|a Biochemical components
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|a Kappaphycus alvarezii
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|a Light intensity
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|a Ocean acidification
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|a Photosynthesis
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|a Carbon Dioxide
|2 NLM
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|a 142M471B3J
|2 NLM
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|a Xiao, Zhiliang
|e verfasserin
|4 aut
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|a Wei, Zhangliang
|e verfasserin
|4 aut
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| 700 |
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|a Long, Lijuan
|e verfasserin
|4 aut
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| 773 |
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|i Enthalten in
|t Plant physiology and biochemistry : PPB
|d 1991
|g 208(2024) vom: 26. März, Seite 108465
|w (DE-627)NLM098178261
|x 1873-2690
|7 nnns
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|g volume:208
|g year:2024
|g day:26
|g month:03
|g pages:108465
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|u http://dx.doi.org/10.1016/j.plaphy.2024.108465
|3 Volltext
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