Light history modulates growth and photosynthetic responses of a diatom to ocean acidification and UV radiation
Open accessAbstract
To examine the synergetic effects of ocean acidification (OA) and light intensity on the photosynthetic performance of marine diatoms, the marine centric diatom Thalassiosira weissflogii was cultured under ambient low CO 2 (LC, 390 μatm) and elevated high CO 2 (HC, 1000 μatm) levels under low-light (LL, 60 μmol m−2 s−1) or high-light (HL, 220 μmol m−2 s−1) conditions for over 20 generations. HL stimulated the growth rate by 128 and 99% but decreased cell size by 9 and 7% under LC and HC conditions, respectively. However, HC did not change the growth rate under LL but decreased it by 9% under HL. LL combined with HC decreased both maximum quantum yield (FV/FM) and effective quantum yield (ΦPSII), measured under either low or high actinic light. When exposed to UV radiation (UVR), LL-grown cells were more prone to UVA exposure, with higher UVA and UVR inducing inhibition of ΦPSII compared with HL-grown cells. Light use efficiency (α) and maximum relative electron transport rate (rETR max) were inhibited more in the HC-grown cells when UVR (UVA and UVB) was present, particularly under LL. Our results indicate that the growth light history influences the cell growth and photosynthetic responses to OA and UVR.
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These results have recently been extended to more species of diatoms.
“These results have recently been extended to more species of diatoms [228–230], whilst information gaps remain for other phytoplankton groups.”
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Self-citation
- Authors
- Li, W., Wang, T., Campbell, D. A., & Gao, K.
- Affiliations
- Xiamen University (CN)
- Mount Allison University (CA)
- Corresponding author
- Gao, Kunshan
- Venue
- Marine Life Science & Technology
- Published
- 2022-09-12
- Volume
- 5
- Issue
- 1
- Pages
- 116-125
- ISSN
- 2096-6490 (ISSN-L)
- 2662-1746
- PMC
- PMC10077217
- OpenAlex
- W4296554220
- Cited by
- 11
- References
- 1
- Citations by year
- 2026: 4 · 2025: 3 · 2024: 1 · 2023: 3
- FWCI
- 0.86
- Type
- journal article
- Language
- en
- Open access
- hybrid
- doi.org
- Locations
- Marine Life Science & Technology (publishedVersion, cc-by)
- PubMed Central (publishedVersion, cc-by)
- PubMed (publishedVersion)
- Funders
- National Natural Science Foundation of China (#41890803, 41720104005, 41721005)
- Huangshan University
- Anhui Provincial Key Research and Development Plan (202004i07020004)
- Topics
- Physical Sciences › Earth and Planetary Sciences › Oceanography › Ocean Acidification Effects and Responses
- Physical Sciences › Earth and Planetary Sciences › Oceanography › Marine and coastal ecosystems
- Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Photosynthetic Processes and Mechanisms
- Keywords
- ocean acidification, ultraviolet radiation, history of light, Thalassiosira weissflogii, diatom photosynthesis, elevated CO2, light intensity, photosystem II, quantum yield, electron transport rate, light use efficiency, cell growth, cell size, UVA, UV-B radiation
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