Photosynthesis and calcification of the coccolithophore Emiliania huxleyi are more sensitive to changed levels of light and CO2 under nutrient limitation

Zhang, Yong; Gao, Kunshan

doi:10.1016/j.jphotobiol.2021.112145

Cited by 8 publications

(5 citation statements)

References 63 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The response to the above question is that the magnitude and direction of the cumulative impact of UVR, CO 2 , nutrients, and temperature on marine microbial plankton communities is strongly influenced by in situ P limitation. This result of nutrient limitation has already been stressed in laboratory experiments indicating more intense photosystem II photoinhibition by UVR (Litchman et al, 2002), decreased C fixation and maximal relative electron transport rates under high CO 2 (Zhang and Gao, 2021), or increased phytoplankton sensitivity to warming, undergoing reductions of between 3 and 6 °C in its optimum temperature for growth (Thomas et al, 2017). We provide evidence for the first time in a microbial plankton community, no effect (stimulatory or inhibitory) of Future enr+warming on PP with respect to current conditions in either of the two study areas.…”

Section: Discussionmentioning

confidence: 76%

Microbial plankton responses to multiple environmental drivers in marine ecosystems with different phosphorus limitation degrees

Cabrerizo

Medina‐Sánchez

González-Olalla³

et al. 2022

Science of The Total Environment

View full text Add to dashboard Cite

Section: Discussionmentioning

confidence: 76%

Microbial plankton responses to multiple environmental drivers in marine ecosystems with different phosphorus limitation degrees

Cabrerizo

Medina‐Sánchez

González-Olalla³

et al. 2022

Science of The Total Environment

View full text Add to dashboard Cite

“…Calci cation in E. huxleyi has been suggested to act as an electron sink 51 and is known to increase with enhanced light intensities 52 . Strain PMLB 92 − 11, used in the present work, did not calcify (Fig.…”

Section: Discussionmentioning

confidence: 99%

Photosynthesis drives methane production in a coccolithophorid, creating a negative feedback for carbon sequestration.

Gao,

Rao,

Gao

et al. 2024

Preprint

Self Cite

View full text Add to dashboard Cite

Phytoplankton produces methane (CH4), a potent greenhouse gas. Little is known about the relationship between their CH4 production and photosynthesis, the predominant biological pathway of CO2 sequestration in the ocean. We show that CH4 released by the widespread, bloom-forming marine microalga Emiliania huxleyi grown under different light levels correlated positively with photosynthetic electron transfer and carbon fixation. We ruled out the possibility of classical methanogenesis in the cultures and showed that under saturating light E. huxleyi produces CH4 at a maximal rate of about 6.6 ×10− 11 µg CH4 cell− 1 d− 1 or 3.9 µg CH4 g− 1 particulate organic carbon d− 1, and cannot generate CH4 in darkness. Accounting for the CH4 released vs CO2 fixed, the stronger global warming potential of CH4, and estimates of CO2 that reaches the ocean interior, we conclude that E. huxleyi’s contribution to the marine biological carbon pump may be attenuated by up to 13% due to its CH4 release.

show abstract

“…Under supersaturating light, the diploid cells showed less photoinhibition than the haploid cells, which may be associated with a discrepancy in the capability of dissipating excess energy and subsequent production of reactive oxygen species that damage pigments and proteins and affect the structure and activity of photosystems (Foyer and Harbinson 1999 ; Shi et al 2020 ). As one of the major sinks of cell energy, calcification is important in excess energy dissipation (e Ramos et al 2012 ; Monteiro et al 2016 ; Zhang and Gao 2021 ). The energy budget of calcification (including calcium transport, bicarbonate transport, polysaccharide generation, etc.)…”

Section: Discussionmentioning

confidence: 99%

Different photosynthetic responses of haploid and diploid Emiliania huxleyi (Prymnesiophyceae) to high light and ultraviolet radiation

Ruan

Lin

et al. 2023

Bioresour. Bioprocess.

View full text Add to dashboard Cite

Solar radiation varies quantitatively and qualitatively while penetrating through the seawater column and thus is one of the most important environmental factors shaping the vertical distribution pattern of phytoplankton. The haploid and diploid life-cycle phases of coccolithophores might have different vertical distribution preferences. Therefore, the two phases respond differently to high solar photosynthetically active radiation (PAR, 400–700 nm) and ultraviolet radiation (UVR, 280–400 nm). To test this, the haploid and diploid Emiliania huxleyi were exposed to oversaturating irradiance. In the presence of PAR alone, the effective quantum yield was reduced by 10% more due to the higher damage rate of photosystem II in haploid cells than in diploid cells. The addition of UVR resulted in further inhibition of the quantum yield for both haploid and diploid cells in the first 25 min, partly because of the increased damage of photosystem II. Intriguingly, this UVR-induced inhibition of the haploid cells completely recovered half an hour later. This recovery was confirmed by the comparable maximum quantum yields, maximum relative electron transport rates and yields of the haploid cells treated with PAR and PAR + UVR. Our data indicated that photosynthesis of the haploid phase was more sensitive to high visible light than the diploid phase but resistant to UVR-induced inhibition, reflecting the ecological niches to which this species adapts. Graphical Abstract

show abstract

Photosynthesis and calcification of the coccolithophore Emiliania huxleyi are more sensitive to changed levels of light and CO2 under nutrient limitation

Cited by 8 publications

References 63 publications

Microbial plankton responses to multiple environmental drivers in marine ecosystems with different phosphorus limitation degrees

Microbial plankton responses to multiple environmental drivers in marine ecosystems with different phosphorus limitation degrees

Photosynthesis drives methane production in a coccolithophorid, creating a negative feedback for carbon sequestration.

Different photosynthetic responses of haploid and diploid Emiliania huxleyi (Prymnesiophyceae) to high light and ultraviolet radiation

Contact Info

Product

Resources

About