Calcifying Coccolithophore: An Evolutionary Advantage Against Extracellular Oxidative Damage.

Small

Physical and Theoretical Chemistry Laboratory, Department of Chemistry, University of Oxford, South Parks Road, Oxford, OX1 3QZ, Great Britain.

Published: November 2023


Category Ranking

98%

Total Visits

921

Avg Visit Duration

2 minutes

Citations

20

Article Abstract

The evolutionary advantages afforded by phytoplankton calcification remain enigmatic. In this work, fluoroelectrochemical experiments reveal that the presence of a CaCO shell of a naturally calcifying coccolithophore, Coccolithus braarudii, offers protection against extracellular oxidants as measured by the time required for the switch-off in their chlorophyll signal, compared to the deshelled equivalents, suggesting the shift toward calcification offers some advantages for survival in the surface of radical-rich seawater.

Download full-text PDF

Source
http://dx.doi.org/10.1002/smll.202300346DOI Listing

Publication Analysis

Top Keywords

calcifying coccolithophore
8
coccolithophore evolutionary
4
evolutionary advantage
4
advantage extracellular
4
extracellular oxidative
4
oxidative damage
4
damage evolutionary
4
evolutionary advantages
4
advantages afforded
4
afforded phytoplankton
4

Similar Publications

Structure of a photosystem II-FCPII supercomplex from a haptophyte reveals a distinct antenna organization.

Nat Commun

May 2025

Research Institute for Interdisciplinary Science, and Advanced Research Field, Graduate School of Environmental, Life, Natural Science and Technology, Okayama University, Okayama, Japan.

Haptophytes are unicellular algae that produce 30 to 50% of biomass in oceans. Among haptophytes, a subset named coccolithophores is characterized by calcified scales. Despite the importance of coccolithophores in global carbon fixation and CaCO production, their energy conversion system is still poorly known.

View Article and Find Full Text PDF

Coccolithophores are prominent marine pelagic calcifiers due to their production of calcite coccoliths. Diploid coccolithophores produce heterococcoliths intracellularly, with an organic cellulose baseplate scale acting as a nucleating substrate. However, coccolith production in the haploid life phase has not been extensively studied.

View Article and Find Full Text PDF

Mixotrophy via phagocytosis can have profound consequences for the survival of marine phytoplankton and the efficiency of carbon transfer in marine systems. Little is known about the cellular mechanisms that underly nutrient acquisition via prey uptake and processing in mixotrophic phytoplankton. We used confocal microscopy, flow cytometry, and electron microscopy to assess phagocytosis and intracellular prey processing in the diploid calcifying coccolithophore Scyphosphaera apsteinii.

View Article and Find Full Text PDF

Pelagic calcifying protists such as coccolithophores and foraminifera represent an important microbial component of the marine carbon cycle. Although their calcitic shells are preserved in oceanic sediments over millennia, their resilience in the future decades is uncertain. We review current literature describing the response of calcifying protists to ocean acidification and temperature warming.

View Article and Find Full Text PDF

Coccolithophores comprise a major component of the oceanic carbon cycle. These unicellular algae produce ornate structures made of calcium carbonate, termed coccoliths, representing ~ 50% of calcite production in the open ocean. The exact molecular mechanisms which direct and control coccolith formation are unknown.

View Article and Find Full Text PDF