Self-Assembled Nanoscale Manganese Oxides Enhance Carbon Capture by Diatoms

Xuan Hou; Xiangang Hu

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Self-Assembled Nanoscale Manganese Oxides Enhance Carbon Capture by Diatoms

机译：Self-Assembled Nanoscale Manganese Oxides Enhance Carbon Capture by Diatoms

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Continuous CO2 emissions from human activities increase atmospheric CO2 concentrations and affect global climate change.The carbon storage capacity of the ocean is 20-fold higher than that of the land,and diatoms contribute to approximately 40% of carbon capture in the ocean.Manganese(Mn)is a major driver of marine phytoplankton growth and the marine carbon pump.Here,we discovered self-assembled manganese oxides(MnO-J for CO2 fixation in a diatom-based biohybrid system.MnO,shared key features(e.g.,di-μ-oxo-bridged Mn-Mn)with the Mn4CaO5 cluster of the biological catalyst in photosystem II and promoted photosynthesis and carbon capture by diatoms/MnOx.The CO2 capture capacity of diatoms/MnOx.was 1.5-fold higher than that of diatoms alone.Diatoms/MnOx easily allocated carbon into proteins and lipids instead of carbohydrates.Metabolomics showed that the contents of several metabolites(e.g.,lysine and inositol)were positively associated with increased CO2 capture.Diatoms/MnOx upregulated six genes encoding photosynthesis core proteins and a key rate-limiting enzyme(Rubisco,ribulose 1,5-bisphosphate carboxylase-oxygenase)in the Calvin-Benson-Bassham carbon assimilation cycle,revealing the link between MnOx and photosynthesis.These findings provide a route for offsetting anthropogenic CO2 emissions and inspiration for self-assembled biohybrid systems for carbon capture by marine phytoplankton.

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《Environmental Science & Technology: ES&T》 |2022年第23期|17215-17226|共12页
作者
Xuan Hou; Xiangang Hu;
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作者单位

Key Laboratory of Pollution Processes and Environmental Criteria(Ministry of Education)/Tianjin Key Laboratory of Environmental Remediation and Pollution Control,College of Environmental Science and Engineering Nankai University,Tianjin 3003S0,China;

Key Laboratory of Pollution Processes and Environmental Criteria(Ministry of Education)/Tianjin Key Laboratory of Environmental Remediation and Pollution Control,College of Environmental Science and Engineering,Nankai University,Tianjin 3003S0,China;

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收录信息美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);美国《化学文摘》(CA);
原文格式 PDF
正文语种英语
中图分类环境科学、安全科学;
关键词
diatom; phytoplankton; carbon fixation; photosynthesis; manganese;

Self-Assembled Nanoscale Manganese Oxides Enhance Carbon Capture by Diatoms

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