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Harnessing coccolithophores for carbon capture and storage: exploring nutrient enrichment for future biotechnological applications

円石藻を活用した炭素回収・貯留：将来のバイオテクノロジー応用に向けた栄養塩強化の探求 (AI 翻訳)

E. Palandri, Eleonora Sforza, Sofia Ait Abbas, Federica Relitti, C. De Vittor, A. Carrara, M. Bordiga

Frontiers in Photobiology📚 査読済 / ジャーナル2026-02-17#CCUS対象セクター: biotech
DOI: 10.3389/fphbi.2026.1742840
原典: https://doi.org/10.3389/fphbi.2026.1742840

🤖 gxceed AI 要約

日本語

本研究は、CCUSにおける有望な微細藻類である円石藻に着目し、栄養塩と炭素供給の増加に対する応答を評価した。Gephyrocapsa huxleyiとChrysotila roscoffensisの2株を比較し、C. roscoffensisの1株が最も高い乾燥重量とCO2吸収を示した。また、G. huxleyiは高いPIC:POC比を示し、炭酸塩生産に優れることが明らかになった。産業利用に向けた株スクリーニングの重要性が示された。

English

This study evaluates the response of coccolithophores, a promising microalgal group for CCUS, to increased nutrient and carbon supply. Among tested strains, one Chrysotila roscoffensis strain showed the highest dry weight and CO2 absorption, while Gephyrocapsa huxleyi exhibited high PIC:POC ratio, indicating superior carbonate production. The findings highlight the importance of strain screening for industrial exploitation.

Unofficial AI-generated summary based on the public title and abstract. Not an official translation.

📝 gxceed 編集解説 — Why this matters

日本のGX文脈において

日本では、カーボンニュートラル実現に向けたCCUS技術の開発が進められており、バイオCCUSはその一つとして注目されている。本研究は、微細藻類を用いた炭素回収の可能性を示すもので、日本の研究機関や企業にとって参考になる。ただし、実用化にはコストやスケールアップの課題があり、政策支援が重要である。

In the global GX context

This study contributes to the global CCUS literature by exploring coccolithophores as a biological carbon capture method. It provides empirical data on strain selection and nutrient optimization, which is relevant for developing biotechnological CCUS solutions. The findings may inform future industrial applications and circular economy approaches, though scale-up and economic viability remain challenges.

👥 読者別の含意

🔬研究者:Provides comparative data on coccolithophore strains for CCUS, useful for further biotechnological research.

🏢実務担当者:Offers insights into strain selection and cultivation conditions for potential industrial carbon capture applications.

📄 Abstract（原文）

A less studied yet promising microalgal group within the field of Carbon Capture Usage and Storage (CCUS) is the calcifying marine microalgae known as coccolithophores. They could have significant potential for carbon capture since they can capture CO 2 , partitioning carbon into both their organic tissues and inorganic exoskeletons, composed of several micrometric plates of calcium carbonate (CaCO 3 ), called coccoliths. Moreover, the complex coccolith architecture offers valuable potential for nanotechnological applications, promoting also their reuse within a circular economy. However, comprehensive knowledge of their biotechnological potential and preliminary strain screening for quality assessment remain limited. In this study, a screening aimed at identifying the most promising strains for potential industrial applications was carried out by testing their response and yield under increasing nutrient and carbon supplies: dry weight (DW) and nutrient consumption efficiency were measured for the species Gephyrocapsa huxleyi (formerly Emiliania huxleyi ) and two strains of the species Chrysotila roscoffensis, to identify the most promising strain for industrial applications. We documented a positive effect of nutrient enrichment and an even stronger response to carbon supplementation in the form of sodium bicarbonate (NaHCO 3 ) on the growth of C. roscoffensis and on CaCO 3 production in G. huxleyi . One C. roscoffensis strain proved to be the most promising, exhibiting the highest DW (1,172.7 ± 42.2 mg/L) and CO 2 absorption (1,210.7 ± 3.1 mg/L) compared to G. huxleyi (569.4 ± 20.5 mg/L; 329.9 ± 11.9 mg/L), as well as a stable ratio between Particulate Inorganic Carbon (PIC) and Particulate Organic Carbon (POC) during cultivation. Our experiments also highlighted the ability of G. huxleyi to produce significant amounts of carbonate (2.1 ± 1.1 PIC:POC) compared with the less calcified C. roscoffensis (0.34 ± 0.01 PIC:POC) under enhanced carbon supply. This study emphasizes the importance of preliminary screening to identify the most suitable strain for industrial exploitation, particularly among understudied microalgae such as coccolithophores.

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